./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longest-1.i --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/pthread/triangular-longest-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:39:55,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:39:55,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:39:55,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:39:55,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:39:55,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:39:55,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:39:55,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:39:55,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:39:55,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:39:55,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:39:55,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:39:55,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:39:55,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:39:55,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:39:55,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:39:55,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:39:55,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:39:55,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:39:55,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:39:55,866 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:39:55,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:39:55,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:39:55,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:39:55,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:39:55,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:39:55,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:39:55,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:39:55,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:39:55,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:39:55,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:39:55,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:39:55,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:39:55,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:39:55,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:39:55,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:39:55,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:39:55,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:39:55,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:39:55,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:39:55,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:39:55,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:39:55,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:39:55,907 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:39:55,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:39:55,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:39:55,908 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:39:55,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:39:55,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:39:55,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:39:55,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:39:55,910 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:39:55,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:39:55,911 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:39:55,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:39:55,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:39:55,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:39:55,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:39:55,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:39:55,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:39:55,912 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:39:55,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:39:55,912 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:39:55,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:39:55,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:39:55,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:39:55,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:39:55,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:55,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:39:55,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:39:55,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:39:55,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:39:55,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:39:55,915 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:39:55,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:39:55,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:39:55,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 [2022-07-13 21:39:56,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:39:56,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:39:56,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:39:56,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:39:56,138 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:39:56,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longest-1.i [2022-07-13 21:39:56,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ad5b881e/10164fba133a4fd0864518cc201d4f2f/FLAGbaef22955 [2022-07-13 21:39:56,577 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:39:56,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-1.i [2022-07-13 21:39:56,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ad5b881e/10164fba133a4fd0864518cc201d4f2f/FLAGbaef22955 [2022-07-13 21:39:56,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ad5b881e/10164fba133a4fd0864518cc201d4f2f [2022-07-13 21:39:56,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:39:56,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:39:56,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:56,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:39:56,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:39:56,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377338e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56, skipping insertion in model container [2022-07-13 21:39:56,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:39:56,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:39:56,822 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2022-07-13 21:39:56,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:56,829 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:39:56,891 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2022-07-13 21:39:56,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:56,920 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:39:56,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56 WrapperNode [2022-07-13 21:39:56,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:56,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:56,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:39:56,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:39:56,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,963 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-07-13 21:39:56,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:56,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:39:56,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:39:56,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:39:56,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:56,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:57,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:39:57,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:39:57,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:39:57,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:39:57,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (1/1) ... [2022-07-13 21:39:57,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:57,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:57,032 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 21:39:57,033 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 21:39:57,063 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-13 21:39:57,063 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-13 21:39:57,063 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-13 21:39:57,063 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-13 21:39:57,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:39:57,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:39:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:39:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:39:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:39:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:39:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:39:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:39:57,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:39:57,065 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 21:39:57,159 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:39:57,161 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:39:57,258 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:39:57,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:39:57,262 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 21:39:57,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:57 BoogieIcfgContainer [2022-07-13 21:39:57,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:39:57,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:39:57,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:39:57,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:39:57,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:39:56" (1/3) ... [2022-07-13 21:39:57,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfd7582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:57, skipping insertion in model container [2022-07-13 21:39:57,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:56" (2/3) ... [2022-07-13 21:39:57,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfd7582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:57, skipping insertion in model container [2022-07-13 21:39:57,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:57" (3/3) ... [2022-07-13 21:39:57,269 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2022-07-13 21:39:57,272 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:39:57,278 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:39:57,278 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:39:57,278 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:39:57,301 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:39:57,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-07-13 21:39:57,355 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-13 21:39:57,356 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:39:57,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-07-13 21:39:57,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-07-13 21:39:57,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-07-13 21:39:57,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:39:57,372 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@1e61779b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51d5f77 [2022-07-13 21:39:57,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 21:39:57,382 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-07-13 21:39:57,382 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:39:57,383 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:57,383 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:57,384 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 21:39:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:57,387 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-07-13 21:39:57,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:57,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742294809] [2022-07-13 21:39:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:57,644 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 21:39:57,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:57,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742294809] [2022-07-13 21:39:57,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742294809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:57,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:57,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922073702] [2022-07-13 21:39:57,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:57,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:57,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:57,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:57,687 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:57,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:57,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:57,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:57,808 INFO L129 PetriNetUnfolder]: 42/203 cut-off events. [2022-07-13 21:39:57,808 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 21:39:57,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 761 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-07-13 21:39:57,811 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-07-13 21:39:57,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-07-13 21:39:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:39:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:39:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-07-13 21:39:57,821 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-07-13 21:39:57,822 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-07-13 21:39:57,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-07-13 21:39:57,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:57,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-07-13 21:39:57,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,843 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,844 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-07-13 21:39:57,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-07-13 21:39:57,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 21:39:57,848 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-07-13 21:39:57,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-07-13 21:39:57,853 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-07-13 21:39:57,855 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-07-13 21:39:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,856 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:57,856 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:57,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:39:57,857 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 21:39:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-07-13 21:39:57,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:57,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578467658] [2022-07-13 21:39:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:57,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:57,940 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 21:39:57,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:57,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578467658] [2022-07-13 21:39:57,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578467658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:57,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:57,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272841904] [2022-07-13 21:39:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:57,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:57,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:57,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:57,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:57,943 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:57,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:57,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:57,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:58,040 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2022-07-13 21:39:58,043 INFO L130 PetriNetUnfolder]: For 115/120 co-relation queries the response was YES. [2022-07-13 21:39:58,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 115/120 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 854 event pairs, 0 based on Foata normal form. 3/206 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2022-07-13 21:39:58,050 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-07-13 21:39:58,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-07-13 21:39:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:39:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:39:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-07-13 21:39:58,052 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-07-13 21:39:58,052 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-07-13 21:39:58,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-07-13 21:39:58,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:58,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-07-13 21:39:58,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,056 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,056 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-07-13 21:39:58,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-07-13 21:39:58,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:39:58,064 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-07-13 21:39:58,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-07-13 21:39:58,065 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-07-13 21:39:58,066 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-07-13 21:39:58,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:58,066 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:58,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:39:58,067 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 21:39:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-07-13 21:39:58,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:58,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745419577] [2022-07-13 21:39:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:58,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:58,160 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 21:39:58,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:58,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745419577] [2022-07-13 21:39:58,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745419577] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:58,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:58,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:58,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824321203] [2022-07-13 21:39:58,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:58,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:58,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:58,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:58,163 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:58,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:58,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:58,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:58,255 INFO L129 PetriNetUnfolder]: 37/196 cut-off events. [2022-07-13 21:39:58,255 INFO L130 PetriNetUnfolder]: For 265/276 co-relation queries the response was YES. [2022-07-13 21:39:58,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 265/276 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 654 event pairs, 0 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-07-13 21:39:58,258 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-07-13 21:39:58,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-07-13 21:39:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:39:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:39:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-07-13 21:39:58,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-07-13 21:39:58,260 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-07-13 21:39:58,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-07-13 21:39:58,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:58,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-07-13 21:39:58,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,265 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,265 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-07-13 21:39:58,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-07-13 21:39:58,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-07-13 21:39:58,278 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-07-13 21:39:58,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-07-13 21:39:58,280 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-07-13 21:39:58,280 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-07-13 21:39:58,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,280 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:58,280 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:58,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:39:58,280 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 21:39:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:58,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-07-13 21:39:58,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:58,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051892952] [2022-07-13 21:39:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:58,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:58,381 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 21:39:58,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051892952] [2022-07-13 21:39:58,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051892952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:58,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:58,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:58,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248339854] [2022-07-13 21:39:58,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:58,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:58,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:58,384 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:58,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:58,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:58,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:58,459 INFO L129 PetriNetUnfolder]: 30/185 cut-off events. [2022-07-13 21:39:58,459 INFO L130 PetriNetUnfolder]: For 253/276 co-relation queries the response was YES. [2022-07-13 21:39:58,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 185 events. 30/185 cut-off events. For 253/276 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 18/186 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2022-07-13 21:39:58,461 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-07-13 21:39:58,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-07-13 21:39:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:39:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:39:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-07-13 21:39:58,463 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-07-13 21:39:58,463 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-07-13 21:39:58,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-07-13 21:39:58,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:58,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-07-13 21:39:58,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,465 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,466 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-07-13 21:39:58,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-07-13 21:39:58,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-13 21:39:58,468 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-07-13 21:39:58,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-07-13 21:39:58,469 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-07-13 21:39:58,469 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-07-13 21:39:58,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,470 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:58,470 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:58,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:39:58,470 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 21:39:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1461818299, now seen corresponding path program 1 times [2022-07-13 21:39:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:58,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128790504] [2022-07-13 21:39:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:58,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:58,551 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 21:39:58,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:58,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128790504] [2022-07-13 21:39:58,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128790504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:58,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:58,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:39:58,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015774329] [2022-07-13 21:39:58,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:39:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:39:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:39:58,553 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:58,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:58,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:58,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:58,653 INFO L129 PetriNetUnfolder]: 43/234 cut-off events. [2022-07-13 21:39:58,653 INFO L130 PetriNetUnfolder]: For 621/645 co-relation queries the response was YES. [2022-07-13 21:39:58,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 234 events. 43/234 cut-off events. For 621/645 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 845 event pairs, 1 based on Foata normal form. 17/229 useless extension candidates. Maximal degree in co-relation 535. Up to 50 conditions per place. [2022-07-13 21:39:58,655 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 21 changer transitions 8/97 dead transitions. [2022-07-13 21:39:58,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 660 flow [2022-07-13 21:39:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:39:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:39:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-07-13 21:39:58,657 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-07-13 21:39:58,657 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-07-13 21:39:58,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-07-13 21:39:58,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:58,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-07-13 21:39:58,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,660 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,660 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 644 transitions. [2022-07-13 21:39:58,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 660 flow [2022-07-13 21:39:58,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 544 flow, removed 45 selfloop flow, removed 10 redundant places. [2022-07-13 21:39:58,665 INFO L242 Difference]: Finished difference. Result has 97 places, 79 transitions, 417 flow [2022-07-13 21:39:58,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2022-07-13 21:39:58,667 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2022-07-13 21:39:58,667 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 417 flow [2022-07-13 21:39:58,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,668 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:58,668 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:58,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:39:58,668 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 21:39:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-07-13 21:39:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:58,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468486940] [2022-07-13 21:39:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:58,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:58,779 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 21:39:58,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:58,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468486940] [2022-07-13 21:39:58,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468486940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:58,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:58,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:39:58,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666754039] [2022-07-13 21:39:58,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:58,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:39:58,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:58,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:39:58,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:39:58,783 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:58,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:58,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:58,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:58,896 INFO L129 PetriNetUnfolder]: 38/219 cut-off events. [2022-07-13 21:39:58,896 INFO L130 PetriNetUnfolder]: For 833/879 co-relation queries the response was YES. [2022-07-13 21:39:58,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 219 events. 38/219 cut-off events. For 833/879 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 801 event pairs, 1 based on Foata normal form. 27/225 useless extension candidates. Maximal degree in co-relation 579. Up to 46 conditions per place. [2022-07-13 21:39:58,898 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 21 selfloop transitions, 23 changer transitions 11/100 dead transitions. [2022-07-13 21:39:58,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 791 flow [2022-07-13 21:39:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 21:39:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 21:39:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2022-07-13 21:39:58,900 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-13 21:39:58,900 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2022-07-13 21:39:58,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2022-07-13 21:39:58,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:58,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2022-07-13 21:39:58,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states 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 21:39:58,905 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states 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 21:39:58,905 INFO L186 Difference]: Start difference. First operand has 97 places, 79 transitions, 417 flow. Second operand 12 states and 696 transitions. [2022-07-13 21:39:58,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 791 flow [2022-07-13 21:39:58,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 733 flow, removed 20 selfloop flow, removed 5 redundant places. [2022-07-13 21:39:58,909 INFO L242 Difference]: Finished difference. Result has 106 places, 82 transitions, 505 flow [2022-07-13 21:39:58,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=505, PETRI_PLACES=106, PETRI_TRANSITIONS=82} [2022-07-13 21:39:58,910 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 36 predicate places. [2022-07-13 21:39:58,910 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 82 transitions, 505 flow [2022-07-13 21:39:58,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,910 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:58,910 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:58,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:39:58,911 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 21:39:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1359039926, now seen corresponding path program 1 times [2022-07-13 21:39:58,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:58,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438288901] [2022-07-13 21:39:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:59,002 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 21:39:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:59,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438288901] [2022-07-13 21:39:59,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438288901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:59,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577982915] [2022-07-13 21:39:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:59,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:59,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:59,008 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 21:39:59,009 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 21:39:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:59,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:39:59,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:59,161 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 21:39:59,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:59,342 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 21:39:59,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577982915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:59,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:59,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-13 21:39:59,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492068999] [2022-07-13 21:39:59,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:59,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:39:59,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:39:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-13 21:39:59,344 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:59,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 82 transitions, 505 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:59,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:59,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:59,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:59,516 INFO L129 PetriNetUnfolder]: 50/302 cut-off events. [2022-07-13 21:39:59,517 INFO L130 PetriNetUnfolder]: For 1613/1662 co-relation queries the response was YES. [2022-07-13 21:39:59,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 918 conditions, 302 events. 50/302 cut-off events. For 1613/1662 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1061 event pairs, 0 based on Foata normal form. 31/302 useless extension candidates. Maximal degree in co-relation 868. Up to 62 conditions per place. [2022-07-13 21:39:59,519 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 35 selfloop transitions, 17 changer transitions 20/117 dead transitions. [2022-07-13 21:39:59,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 117 transitions, 1183 flow [2022-07-13 21:39:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 21:39:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 21:39:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1104 transitions. [2022-07-13 21:39:59,522 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8300751879699249 [2022-07-13 21:39:59,522 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1104 transitions. [2022-07-13 21:39:59,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1104 transitions. [2022-07-13 21:39:59,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:59,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1104 transitions. [2022-07-13 21:39:59,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states 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 21:39:59,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states 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 21:39:59,527 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states 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 21:39:59,527 INFO L186 Difference]: Start difference. First operand has 106 places, 82 transitions, 505 flow. Second operand 19 states and 1104 transitions. [2022-07-13 21:39:59,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 117 transitions, 1183 flow [2022-07-13 21:39:59,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 117 transitions, 1094 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-07-13 21:39:59,533 INFO L242 Difference]: Finished difference. Result has 125 places, 88 transitions, 628 flow [2022-07-13 21:39:59,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=628, PETRI_PLACES=125, PETRI_TRANSITIONS=88} [2022-07-13 21:39:59,533 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 55 predicate places. [2022-07-13 21:39:59,534 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 88 transitions, 628 flow [2022-07-13 21:39:59,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:59,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:59,536 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:59,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:59,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:59,756 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 21:39:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:59,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2088183908, now seen corresponding path program 2 times [2022-07-13 21:39:59,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:59,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042939045] [2022-07-13 21:39:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:59,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:59,822 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 21:39:59,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042939045] [2022-07-13 21:39:59,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042939045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:59,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887938988] [2022-07-13 21:39:59,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:39:59,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:59,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:59,824 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 21:39:59,867 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 21:39:59,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:39:59,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:59,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:39:59,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:59,955 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 21:39:59,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:00,048 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 21:40:00,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887938988] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:00,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:00,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-13 21:40:00,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539251333] [2022-07-13 21:40:00,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:00,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:40:00,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:00,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:40:00,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-13 21:40:00,052 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:00,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 88 transitions, 628 flow. Second operand has 13 states, 13 states have (on average 56.69230769230769) internal successors, (737), 13 states have internal predecessors, (737), 0 states have call successors, (0), 0 states 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 21:40:00,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:00,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:00,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:00,325 INFO L129 PetriNetUnfolder]: 79/415 cut-off events. [2022-07-13 21:40:00,325 INFO L130 PetriNetUnfolder]: For 6917/7071 co-relation queries the response was YES. [2022-07-13 21:40:00,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1890 conditions, 415 events. 79/415 cut-off events. For 6917/7071 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1882 event pairs, 0 based on Foata normal form. 34/410 useless extension candidates. Maximal degree in co-relation 1821. Up to 102 conditions per place. [2022-07-13 21:40:00,330 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 31 selfloop transitions, 48 changer transitions 23/147 dead transitions. [2022-07-13 21:40:00,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 147 transitions, 2258 flow [2022-07-13 21:40:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 21:40:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-13 21:40:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1626 transitions. [2022-07-13 21:40:00,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8295918367346938 [2022-07-13 21:40:00,335 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1626 transitions. [2022-07-13 21:40:00,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1626 transitions. [2022-07-13 21:40:00,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:00,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1626 transitions. [2022-07-13 21:40:00,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 58.07142857142857) internal successors, (1626), 28 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states 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 21:40:00,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states 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 21:40:00,343 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states 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 21:40:00,343 INFO L186 Difference]: Start difference. First operand has 125 places, 88 transitions, 628 flow. Second operand 28 states and 1626 transitions. [2022-07-13 21:40:00,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 147 transitions, 2258 flow [2022-07-13 21:40:00,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 147 transitions, 1816 flow, removed 210 selfloop flow, removed 12 redundant places. [2022-07-13 21:40:00,354 INFO L242 Difference]: Finished difference. Result has 154 places, 107 transitions, 1086 flow [2022-07-13 21:40:00,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1086, PETRI_PLACES=154, PETRI_TRANSITIONS=107} [2022-07-13 21:40:00,356 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2022-07-13 21:40:00,356 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 107 transitions, 1086 flow [2022-07-13 21:40:00,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.69230769230769) internal successors, (737), 13 states have internal predecessors, (737), 0 states have call successors, (0), 0 states 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 21:40:00,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:00,357 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:00,377 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 21:40:00,567 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,SelfDestructingSolverStorable7 [2022-07-13 21:40:00,568 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 21:40:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2093229174, now seen corresponding path program 1 times [2022-07-13 21:40:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:00,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273679836] [2022-07-13 21:40:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273679836] [2022-07-13 21:40:00,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273679836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055432755] [2022-07-13 21:40:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:00,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:00,653 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 21:40:00,654 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 21:40:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:00,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 21:40:00,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:00,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:00,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055432755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:00,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:00,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-13 21:40:00,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547588346] [2022-07-13 21:40:00,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:00,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 21:40:00,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 21:40:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:40:00,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:00,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 107 transitions, 1086 flow. Second operand has 16 states, 16 states have (on average 56.5) internal successors, (904), 16 states have internal predecessors, (904), 0 states have call successors, (0), 0 states 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 21:40:00,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:00,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:00,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:01,312 INFO L129 PetriNetUnfolder]: 99/547 cut-off events. [2022-07-13 21:40:01,313 INFO L130 PetriNetUnfolder]: For 18187/18428 co-relation queries the response was YES. [2022-07-13 21:40:01,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 547 events. 99/547 cut-off events. For 18187/18428 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3045 event pairs, 2 based on Foata normal form. 40/533 useless extension candidates. Maximal degree in co-relation 3060. Up to 138 conditions per place. [2022-07-13 21:40:01,318 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 35 selfloop transitions, 65 changer transitions 23/168 dead transitions. [2022-07-13 21:40:01,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 168 transitions, 3523 flow [2022-07-13 21:40:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 21:40:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-13 21:40:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1679 transitions. [2022-07-13 21:40:01,321 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8270935960591133 [2022-07-13 21:40:01,321 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1679 transitions. [2022-07-13 21:40:01,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1679 transitions. [2022-07-13 21:40:01,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:01,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1679 transitions. [2022-07-13 21:40:01,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 57.89655172413793) internal successors, (1679), 29 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states 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 21:40:01,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 70.0) internal successors, (2100), 30 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 21:40:01,329 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 70.0) internal successors, (2100), 30 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 21:40:01,329 INFO L186 Difference]: Start difference. First operand has 154 places, 107 transitions, 1086 flow. Second operand 29 states and 1679 transitions. [2022-07-13 21:40:01,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 168 transitions, 3523 flow [2022-07-13 21:40:01,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 168 transitions, 2968 flow, removed 267 selfloop flow, removed 13 redundant places. [2022-07-13 21:40:01,351 INFO L242 Difference]: Finished difference. Result has 179 places, 129 transitions, 1676 flow [2022-07-13 21:40:01,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1676, PETRI_PLACES=179, PETRI_TRANSITIONS=129} [2022-07-13 21:40:01,352 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 109 predicate places. [2022-07-13 21:40:01,352 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 129 transitions, 1676 flow [2022-07-13 21:40:01,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.5) internal successors, (904), 16 states have internal predecessors, (904), 0 states have call successors, (0), 0 states 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 21:40:01,353 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:01,353 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:01,372 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 21:40:01,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:01,572 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 21:40:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1854653567, now seen corresponding path program 2 times [2022-07-13 21:40:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993471866] [2022-07-13 21:40:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:01,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:01,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993471866] [2022-07-13 21:40:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993471866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652906113] [2022-07-13 21:40:01,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:40:01,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:01,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:01,658 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 21:40:01,711 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 21:40:01,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:40:01,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:01,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 21:40:01,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:01,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:01,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652906113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:01,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:01,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-13 21:40:01,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721860846] [2022-07-13 21:40:01,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:01,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:40:01,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:01,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:40:01,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:40:01,929 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:01,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 129 transitions, 1676 flow. Second operand has 18 states, 18 states have (on average 56.5) internal successors, (1017), 18 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states 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 21:40:01,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:01,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:01,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:02,439 INFO L129 PetriNetUnfolder]: 121/704 cut-off events. [2022-07-13 21:40:02,439 INFO L130 PetriNetUnfolder]: For 37894/38150 co-relation queries the response was YES. [2022-07-13 21:40:02,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 704 events. 121/704 cut-off events. For 37894/38150 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4173 event pairs, 0 based on Foata normal form. 54/691 useless extension candidates. Maximal degree in co-relation 4618. Up to 168 conditions per place. [2022-07-13 21:40:02,460 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 41 selfloop transitions, 96 changer transitions 29/211 dead transitions. [2022-07-13 21:40:02,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 211 transitions, 5643 flow [2022-07-13 21:40:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 21:40:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-13 21:40:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2143 transitions. [2022-07-13 21:40:02,462 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8274131274131274 [2022-07-13 21:40:02,462 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2143 transitions. [2022-07-13 21:40:02,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2143 transitions. [2022-07-13 21:40:02,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:02,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2143 transitions. [2022-07-13 21:40:02,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.91891891891892) internal successors, (2143), 37 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states 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 21:40:02,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states 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 21:40:02,469 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states 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 21:40:02,469 INFO L186 Difference]: Start difference. First operand has 179 places, 129 transitions, 1676 flow. Second operand 37 states and 2143 transitions. [2022-07-13 21:40:02,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 211 transitions, 5643 flow [2022-07-13 21:40:02,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 211 transitions, 4675 flow, removed 453 selfloop flow, removed 19 redundant places. [2022-07-13 21:40:02,503 INFO L242 Difference]: Finished difference. Result has 211 places, 157 transitions, 2486 flow [2022-07-13 21:40:02,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2486, PETRI_PLACES=211, PETRI_TRANSITIONS=157} [2022-07-13 21:40:02,504 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 141 predicate places. [2022-07-13 21:40:02,504 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 157 transitions, 2486 flow [2022-07-13 21:40:02,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.5) internal successors, (1017), 18 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states 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 21:40:02,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:02,505 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:02,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 21:40:02,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:02,719 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 21:40:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:02,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1085222120, now seen corresponding path program 3 times [2022-07-13 21:40:02,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:02,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529514819] [2022-07-13 21:40:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:02,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:02,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529514819] [2022-07-13 21:40:02,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529514819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761597324] [2022-07-13 21:40:02,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:40:02,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:02,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:02,836 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 21:40:02,855 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 21:40:02,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 21:40:02,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:02,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 21:40:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:03,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:03,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761597324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:03,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:03,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-07-13 21:40:03,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025264012] [2022-07-13 21:40:03,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:03,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 21:40:03,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:03,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 21:40:03,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-07-13 21:40:03,190 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:03,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 157 transitions, 2486 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:03,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:03,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:03,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:04,166 INFO L129 PetriNetUnfolder]: 173/1034 cut-off events. [2022-07-13 21:40:04,166 INFO L130 PetriNetUnfolder]: For 79406/79786 co-relation queries the response was YES. [2022-07-13 21:40:04,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 1034 events. 173/1034 cut-off events. For 79406/79786 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 5880 event pairs, 1 based on Foata normal form. 46/976 useless extension candidates. Maximal degree in co-relation 7794. Up to 230 conditions per place. [2022-07-13 21:40:04,181 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 57 selfloop transitions, 142 changer transitions 32/276 dead transitions. [2022-07-13 21:40:04,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 276 transitions, 9682 flow [2022-07-13 21:40:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-13 21:40:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-13 21:40:04,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2893 transitions. [2022-07-13 21:40:04,184 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8265714285714286 [2022-07-13 21:40:04,184 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2893 transitions. [2022-07-13 21:40:04,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2893 transitions. [2022-07-13 21:40:04,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:04,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2893 transitions. [2022-07-13 21:40:04,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.86) internal successors, (2893), 50 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states 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 21:40:04,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states 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 21:40:04,194 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states 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 21:40:04,194 INFO L186 Difference]: Start difference. First operand has 211 places, 157 transitions, 2486 flow. Second operand 50 states and 2893 transitions. [2022-07-13 21:40:04,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 276 transitions, 9682 flow [2022-07-13 21:40:04,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 276 transitions, 7780 flow, removed 914 selfloop flow, removed 26 redundant places. [2022-07-13 21:40:04,286 INFO L242 Difference]: Finished difference. Result has 256 places, 207 transitions, 3902 flow [2022-07-13 21:40:04,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3902, PETRI_PLACES=256, PETRI_TRANSITIONS=207} [2022-07-13 21:40:04,287 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 186 predicate places. [2022-07-13 21:40:04,287 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 207 transitions, 3902 flow [2022-07-13 21:40:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:04,287 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:04,288 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:04,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 21:40:04,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 21:40:04,504 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 21:40:04,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash -35884208, now seen corresponding path program 4 times [2022-07-13 21:40:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652675521] [2022-07-13 21:40:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:04,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:04,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652675521] [2022-07-13 21:40:04,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652675521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:04,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10324438] [2022-07-13 21:40:04,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 21:40:04,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:04,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:04,760 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 21:40:04,761 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 21:40:04,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 21:40:04,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:04,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 21:40:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:05,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:05,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10324438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:05,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:05,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-07-13 21:40:05,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255586113] [2022-07-13 21:40:05,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:05,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 21:40:05,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:05,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 21:40:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 21:40:05,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:05,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 207 transitions, 3902 flow. Second operand has 41 states, 41 states have (on average 56.24390243902439) internal successors, (2306), 41 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states 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 21:40:05,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:05,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:05,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:06,957 INFO L129 PetriNetUnfolder]: 231/1526 cut-off events. [2022-07-13 21:40:06,958 INFO L130 PetriNetUnfolder]: For 190333/190570 co-relation queries the response was YES. [2022-07-13 21:40:06,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13461 conditions, 1526 events. 231/1526 cut-off events. For 190333/190570 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8216 event pairs, 0 based on Foata normal form. 41/1405 useless extension candidates. Maximal degree in co-relation 13337. Up to 326 conditions per place. [2022-07-13 21:40:06,981 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 183 selfloop transitions, 55 changer transitions 62/345 dead transitions. [2022-07-13 21:40:06,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 345 transitions, 15462 flow [2022-07-13 21:40:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 21:40:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-13 21:40:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3526 transitions. [2022-07-13 21:40:06,984 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8257611241217798 [2022-07-13 21:40:06,985 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3526 transitions. [2022-07-13 21:40:06,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3526 transitions. [2022-07-13 21:40:06,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:06,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3526 transitions. [2022-07-13 21:40:06,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 57.80327868852459) internal successors, (3526), 61 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states 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 21:40:07,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 70.0) internal successors, (4340), 62 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states 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 21:40:07,021 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 70.0) internal successors, (4340), 62 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states 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 21:40:07,021 INFO L186 Difference]: Start difference. First operand has 256 places, 207 transitions, 3902 flow. Second operand 61 states and 3526 transitions. [2022-07-13 21:40:07,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 345 transitions, 15462 flow [2022-07-13 21:40:07,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 345 transitions, 12149 flow, removed 1622 selfloop flow, removed 21 redundant places. [2022-07-13 21:40:07,240 INFO L242 Difference]: Finished difference. Result has 331 places, 245 transitions, 4983 flow [2022-07-13 21:40:07,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4983, PETRI_PLACES=331, PETRI_TRANSITIONS=245} [2022-07-13 21:40:07,241 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 261 predicate places. [2022-07-13 21:40:07,241 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 245 transitions, 4983 flow [2022-07-13 21:40:07,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.24390243902439) internal successors, (2306), 41 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states 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 21:40:07,242 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:07,242 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:07,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:07,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:07,454 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 21:40:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1499272378, now seen corresponding path program 5 times [2022-07-13 21:40:07,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:07,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601122116] [2022-07-13 21:40:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:07,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:07,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:07,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601122116] [2022-07-13 21:40:07,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601122116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:07,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765419725] [2022-07-13 21:40:07,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 21:40:07,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:07,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:07,678 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 21:40:07,679 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 21:40:07,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-13 21:40:07,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:07,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 21:40:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:07,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:08,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765419725] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:08,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:08,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-07-13 21:40:08,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166432357] [2022-07-13 21:40:08,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:08,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 21:40:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:08,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 21:40:08,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1288, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 21:40:08,536 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:08,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 245 transitions, 4983 flow. Second operand has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states 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 21:40:08,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:08,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:08,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:10,078 INFO L129 PetriNetUnfolder]: 311/2133 cut-off events. [2022-07-13 21:40:10,079 INFO L130 PetriNetUnfolder]: For 416457/417749 co-relation queries the response was YES. [2022-07-13 21:40:10,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21836 conditions, 2133 events. 311/2133 cut-off events. For 416457/417749 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 13974 event pairs, 0 based on Foata normal form. 52/1961 useless extension candidates. Maximal degree in co-relation 21677. Up to 486 conditions per place. [2022-07-13 21:40:10,116 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 147 selfloop transitions, 178 changer transitions 62/432 dead transitions. [2022-07-13 21:40:10,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 432 transitions, 20548 flow [2022-07-13 21:40:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-13 21:40:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-13 21:40:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3985 transitions. [2022-07-13 21:40:10,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8250517598343685 [2022-07-13 21:40:10,142 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3985 transitions. [2022-07-13 21:40:10,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3985 transitions. [2022-07-13 21:40:10,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:10,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3985 transitions. [2022-07-13 21:40:10,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 57.7536231884058) internal successors, (3985), 69 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states 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 21:40:10,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 70.0) internal successors, (4900), 70 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states 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 21:40:10,152 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 70.0) internal successors, (4900), 70 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states 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 21:40:10,152 INFO L186 Difference]: Start difference. First operand has 331 places, 245 transitions, 4983 flow. Second operand 69 states and 3985 transitions. [2022-07-13 21:40:10,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 432 transitions, 20548 flow [2022-07-13 21:40:10,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 432 transitions, 17294 flow, removed 1613 selfloop flow, removed 31 redundant places. [2022-07-13 21:40:11,003 INFO L242 Difference]: Finished difference. Result has 388 places, 324 transitions, 7599 flow [2022-07-13 21:40:11,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3749, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=7599, PETRI_PLACES=388, PETRI_TRANSITIONS=324} [2022-07-13 21:40:11,003 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 318 predicate places. [2022-07-13 21:40:11,004 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 324 transitions, 7599 flow [2022-07-13 21:40:11,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states 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 21:40:11,004 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:11,005 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:11,020 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 21:40:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:11,206 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 21:40:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1030953512, now seen corresponding path program 6 times [2022-07-13 21:40:11,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:11,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280319738] [2022-07-13 21:40:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:11,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:11,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280319738] [2022-07-13 21:40:11,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280319738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559268184] [2022-07-13 21:40:11,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 21:40:11,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:11,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:11,434 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 21:40:11,435 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 21:40:11,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-13 21:40:11,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:11,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 21:40:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:11,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:12,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559268184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:12,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:12,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2022-07-13 21:40:12,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126249685] [2022-07-13 21:40:12,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:12,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-13 21:40:12,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-13 21:40:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 21:40:12,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:12,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 324 transitions, 7599 flow. Second operand has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states 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 21:40:12,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:12,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:12,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:14,173 INFO L129 PetriNetUnfolder]: 411/2990 cut-off events. [2022-07-13 21:40:14,173 INFO L130 PetriNetUnfolder]: For 804449/806183 co-relation queries the response was YES. [2022-07-13 21:40:14,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33882 conditions, 2990 events. 411/2990 cut-off events. For 804449/806183 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 22818 event pairs, 0 based on Foata normal form. 59/2732 useless extension candidates. Maximal degree in co-relation 33701. Up to 682 conditions per place. [2022-07-13 21:40:14,235 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 97 selfloop transitions, 339 changer transitions 62/543 dead transitions. [2022-07-13 21:40:14,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 543 transitions, 28396 flow [2022-07-13 21:40:14,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-13 21:40:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-07-13 21:40:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4391 transitions. [2022-07-13 21:40:14,239 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8253759398496241 [2022-07-13 21:40:14,239 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4391 transitions. [2022-07-13 21:40:14,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4391 transitions. [2022-07-13 21:40:14,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:14,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4391 transitions. [2022-07-13 21:40:14,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 57.776315789473685) internal successors, (4391), 76 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states 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 21:40:14,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 70.0) internal successors, (5390), 77 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states 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 21:40:14,249 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 70.0) internal successors, (5390), 77 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states 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 21:40:14,249 INFO L186 Difference]: Start difference. First operand has 388 places, 324 transitions, 7599 flow. Second operand 76 states and 4391 transitions. [2022-07-13 21:40:14,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 543 transitions, 28396 flow [2022-07-13 21:40:16,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 543 transitions, 24112 flow, removed 2107 selfloop flow, removed 36 redundant places. [2022-07-13 21:40:16,042 INFO L242 Difference]: Finished difference. Result has 452 places, 427 transitions, 11451 flow [2022-07-13 21:40:16,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5981, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=11451, PETRI_PLACES=452, PETRI_TRANSITIONS=427} [2022-07-13 21:40:16,043 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 382 predicate places. [2022-07-13 21:40:16,043 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 427 transitions, 11451 flow [2022-07-13 21:40:16,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states 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 21:40:16,044 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:16,044 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:16,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:16,245 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,SelfDestructingSolverStorable13 [2022-07-13 21:40:16,245 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 21:40:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1999369348, now seen corresponding path program 7 times [2022-07-13 21:40:16,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:16,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710069912] [2022-07-13 21:40:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:16,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:16,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:16,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710069912] [2022-07-13 21:40:16,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710069912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:16,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139071693] [2022-07-13 21:40:16,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 21:40:16,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:16,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:16,429 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 21:40:16,430 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 21:40:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:16,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 21:40:16,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:16,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:17,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139071693] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:17,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:17,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2022-07-13 21:40:17,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31836386] [2022-07-13 21:40:17,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:17,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-13 21:40:17,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:17,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-13 21:40:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1408, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 21:40:17,047 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:17,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 427 transitions, 11451 flow. Second operand has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states 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 21:40:17,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:17,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:17,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:19,956 INFO L129 PetriNetUnfolder]: 541/3896 cut-off events. [2022-07-13 21:40:19,956 INFO L130 PetriNetUnfolder]: For 1454840/1456270 co-relation queries the response was YES. [2022-07-13 21:40:19,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49988 conditions, 3896 events. 541/3896 cut-off events. For 1454840/1456270 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 31942 event pairs, 0 based on Foata normal form. 73/3556 useless extension candidates. Maximal degree in co-relation 49781. Up to 878 conditions per place. [2022-07-13 21:40:20,037 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 88 selfloop transitions, 494 changer transitions 65/692 dead transitions. [2022-07-13 21:40:20,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 692 transitions, 41282 flow [2022-07-13 21:40:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-13 21:40:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-13 21:40:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5378 transitions. [2022-07-13 21:40:20,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8261136712749616 [2022-07-13 21:40:20,042 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5378 transitions. [2022-07-13 21:40:20,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5378 transitions. [2022-07-13 21:40:20,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:20,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5378 transitions. [2022-07-13 21:40:20,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 57.82795698924731) internal successors, (5378), 93 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states 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 21:40:20,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 70.0) internal successors, (6580), 94 states have internal predecessors, (6580), 0 states have call successors, (0), 0 states 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 21:40:20,053 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 70.0) internal successors, (6580), 94 states have internal predecessors, (6580), 0 states have call successors, (0), 0 states 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 21:40:20,053 INFO L186 Difference]: Start difference. First operand has 452 places, 427 transitions, 11451 flow. Second operand 93 states and 5378 transitions. [2022-07-13 21:40:20,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 692 transitions, 41282 flow [2022-07-13 21:40:22,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 692 transitions, 31238 flow, removed 4958 selfloop flow, removed 40 redundant places. [2022-07-13 21:40:22,147 INFO L242 Difference]: Finished difference. Result has 543 places, 560 transitions, 16392 flow [2022-07-13 21:40:22,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=16392, PETRI_PLACES=543, PETRI_TRANSITIONS=560} [2022-07-13 21:40:22,147 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 473 predicate places. [2022-07-13 21:40:22,147 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 560 transitions, 16392 flow [2022-07-13 21:40:22,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states 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 21:40:22,148 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:22,148 INFO L200 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:22,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-13 21:40:22,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 21:40:22,349 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 21:40:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1374206889, now seen corresponding path program 8 times [2022-07-13 21:40:22,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:22,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207926039] [2022-07-13 21:40:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:22,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:22,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:22,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207926039] [2022-07-13 21:40:22,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207926039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:22,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903853851] [2022-07-13 21:40:22,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:40:22,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:22,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:22,667 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 21:40:22,668 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 21:40:22,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:40:22,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:40:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:22,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:23,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903853851] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:23,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:23,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-07-13 21:40:23,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895274354] [2022-07-13 21:40:23,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:23,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-13 21:40:23,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:23,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-13 21:40:23,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1673, Unknown=0, NotChecked=0, Total=2162 [2022-07-13 21:40:23,322 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:23,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 560 transitions, 16392 flow. Second operand has 47 states, 47 states have (on average 56.170212765957444) internal successors, (2640), 47 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states 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 21:40:23,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:23,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:23,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:27,224 INFO L129 PetriNetUnfolder]: 653/4659 cut-off events. [2022-07-13 21:40:27,224 INFO L130 PetriNetUnfolder]: For 2185876/2186977 co-relation queries the response was YES. [2022-07-13 21:40:27,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66086 conditions, 4659 events. 653/4659 cut-off events. For 2185876/2186977 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 37760 event pairs, 1 based on Foata normal form. 80/4245 useless extension candidates. Maximal degree in co-relation 65839. Up to 1050 conditions per place. [2022-07-13 21:40:27,326 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 114 selfloop transitions, 603 changer transitions 50/812 dead transitions. [2022-07-13 21:40:27,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 812 transitions, 52273 flow [2022-07-13 21:40:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-07-13 21:40:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-07-13 21:40:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 5895 transitions. [2022-07-13 21:40:27,330 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8256302521008403 [2022-07-13 21:40:27,331 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 5895 transitions. [2022-07-13 21:40:27,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 5895 transitions. [2022-07-13 21:40:27,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:27,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 5895 transitions. [2022-07-13 21:40:27,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 57.794117647058826) internal successors, (5895), 102 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states 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 21:40:27,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 70.0) internal successors, (7210), 103 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states 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 21:40:27,342 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 70.0) internal successors, (7210), 103 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states 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 21:40:27,343 INFO L186 Difference]: Start difference. First operand has 543 places, 560 transitions, 16392 flow. Second operand 102 states and 5895 transitions. [2022-07-13 21:40:27,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 812 transitions, 52273 flow [2022-07-13 21:40:30,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 812 transitions, 40158 flow, removed 5894 selfloop flow, removed 51 redundant places. [2022-07-13 21:40:30,773 INFO L242 Difference]: Finished difference. Result has 620 places, 673 transitions, 20050 flow [2022-07-13 21:40:30,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=12103, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=20050, PETRI_PLACES=620, PETRI_TRANSITIONS=673} [2022-07-13 21:40:30,774 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 550 predicate places. [2022-07-13 21:40:30,774 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 673 transitions, 20050 flow [2022-07-13 21:40:30,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 56.170212765957444) internal successors, (2640), 47 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states 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 21:40:30,775 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:30,775 INFO L200 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:30,792 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 21:40:30,989 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,SelfDestructingSolverStorable15 [2022-07-13 21:40:30,989 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 21:40:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:30,989 INFO L85 PathProgramCache]: Analyzing trace with hash 876299344, now seen corresponding path program 9 times [2022-07-13 21:40:30,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:30,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474352255] [2022-07-13 21:40:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:30,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:31,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:31,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474352255] [2022-07-13 21:40:31,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474352255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:31,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511989045] [2022-07-13 21:40:31,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:40:31,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:31,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:31,569 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 21:40:31,570 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 21:40:31,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-07-13 21:40:31,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:31,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 21:40:31,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:31,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:40:32,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511989045] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:32,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:32,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 51 [2022-07-13 21:40:32,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894730493] [2022-07-13 21:40:32,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:32,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-13 21:40:32,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-13 21:40:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1997, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 21:40:32,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:32,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 673 transitions, 20050 flow. Second operand has 51 states, 51 states have (on average 56.19607843137255) internal successors, (2866), 51 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states 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 21:40:32,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:32,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:32,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:36,584 INFO L129 PetriNetUnfolder]: 699/5119 cut-off events. [2022-07-13 21:40:36,584 INFO L130 PetriNetUnfolder]: For 2860513/2861476 co-relation queries the response was YES. [2022-07-13 21:40:36,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74253 conditions, 5119 events. 699/5119 cut-off events. For 2860513/2861476 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 42044 event pairs, 0 based on Foata normal form. 81/4655 useless extension candidates. Maximal degree in co-relation 73980. Up to 1126 conditions per place. [2022-07-13 21:40:36,775 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 115 selfloop transitions, 674 changer transitions 27/861 dead transitions. [2022-07-13 21:40:36,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 701 places, 861 transitions, 49799 flow [2022-07-13 21:40:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-13 21:40:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-07-13 21:40:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5705 transitions. [2022-07-13 21:40:36,779 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8232323232323232 [2022-07-13 21:40:36,779 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5705 transitions. [2022-07-13 21:40:36,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5705 transitions. [2022-07-13 21:40:36,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:36,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5705 transitions. [2022-07-13 21:40:36,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 57.62626262626262) internal successors, (5705), 99 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states 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 21:40:36,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 70.0) internal successors, (7000), 100 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 21:40:36,789 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 70.0) internal successors, (7000), 100 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 21:40:36,789 INFO L186 Difference]: Start difference. First operand has 620 places, 673 transitions, 20050 flow. Second operand 99 states and 5705 transitions. [2022-07-13 21:40:36,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 701 places, 861 transitions, 49799 flow [2022-07-13 21:40:43,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 861 transitions, 39183 flow, removed 5206 selfloop flow, removed 36 redundant places. [2022-07-13 21:40:43,903 INFO L242 Difference]: Finished difference. Result has 682 places, 743 transitions, 19711 flow [2022-07-13 21:40:43,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=15380, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=19711, PETRI_PLACES=682, PETRI_TRANSITIONS=743} [2022-07-13 21:40:43,904 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 612 predicate places. [2022-07-13 21:40:43,904 INFO L495 AbstractCegarLoop]: Abstraction has has 682 places, 743 transitions, 19711 flow [2022-07-13 21:40:43,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 56.19607843137255) internal successors, (2866), 51 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states 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 21:40:43,905 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:43,905 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:43,921 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 21:40:44,105 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,SelfDestructingSolverStorable16 [2022-07-13 21:40:44,105 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 21:40:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:44,106 INFO L85 PathProgramCache]: Analyzing trace with hash -126817088, now seen corresponding path program 10 times [2022-07-13 21:40:44,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:44,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999488141] [2022-07-13 21:40:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:44,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1766 proven. 95 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 21:40:44,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:44,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999488141] [2022-07-13 21:40:44,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999488141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:44,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11340868] [2022-07-13 21:40:44,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 21:40:44,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:44,617 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 21:40:44,618 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 21:40:44,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 21:40:44,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:44,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 21:40:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1861 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 21:40:44,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:40:44,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11340868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:44,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:40:44,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2022-07-13 21:40:44,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557610426] [2022-07-13 21:40:44,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:44,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 21:40:44,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 21:40:44,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 21:40:44,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-07-13 21:40:44,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 743 transitions, 19711 flow. Second operand has 43 states, 43 states have (on average 59.95348837209303) internal successors, (2578), 43 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states 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 21:40:44,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:44,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-07-13 21:40:44,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:41:12,725 INFO L129 PetriNetUnfolder]: 10105/51002 cut-off events. [2022-07-13 21:41:12,725 INFO L130 PetriNetUnfolder]: For 26341903/26342298 co-relation queries the response was YES. [2022-07-13 21:41:14,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 715299 conditions, 51002 events. 10105/51002 cut-off events. For 26341903/26342298 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 689384 event pairs, 2778 based on Foata normal form. 114/45058 useless extension candidates. Maximal degree in co-relation 715059. Up to 12159 conditions per place. [2022-07-13 21:41:14,843 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 883/883 dead transitions. [2022-07-13 21:41:14,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 883 transitions, 18762 flow [2022-07-13 21:41:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-13 21:41:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-13 21:41:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3820 transitions. [2022-07-13 21:41:14,847 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8662131519274376 [2022-07-13 21:41:14,847 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3820 transitions. [2022-07-13 21:41:14,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3820 transitions. [2022-07-13 21:41:14,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:41:14,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3820 transitions. [2022-07-13 21:41:14,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.63492063492063) internal successors, (3820), 63 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states 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 21:41:14,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 70.0) internal successors, (4480), 64 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states 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 21:41:14,854 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 70.0) internal successors, (4480), 64 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states 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 21:41:14,854 INFO L186 Difference]: Start difference. First operand has 682 places, 743 transitions, 19711 flow. Second operand 63 states and 3820 transitions. [2022-07-13 21:41:14,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 883 transitions, 18762 flow