./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:54:05,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:54:05,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:54:05,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:54:05,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:54:05,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:54:05,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:54:05,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:54:05,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:54:05,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:54:05,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:54:05,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:54:05,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:54:05,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:54:05,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:54:05,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:54:05,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:54:05,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:54:05,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:54:05,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:54:05,998 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:54:06,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:54:06,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:54:06,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:54:06,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:54:06,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:54:06,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:54:06,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:54:06,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:54:06,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:54:06,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:54:06,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:54:06,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:54:06,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:54:06,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:54:06,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:54:06,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:54:06,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:54:06,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:54:06,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:54:06,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:54:06,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:54:06,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:54:06,065 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:54:06,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:54:06,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:54:06,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:54:06,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:54:06,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:54:06,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:54:06,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:54:06,069 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:54:06,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:54:06,070 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:54:06,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:54:06,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:54:06,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:54:06,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:54:06,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:54:06,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:54:06,072 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:54:06,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:54:06,072 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:54:06,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:54:06,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:54:06,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:54:06,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:54:06,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:54:06,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:54:06,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:54:06,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:54:06,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:54:06,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:54:06,074 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:54:06,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:54:06,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:54:06,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 [2022-07-21 08:54:06,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:54:06,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:54:06,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:54:06,459 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:54:06,460 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:54:06,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-07-21 08:54:06,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c01f13030/e4463baec1264f0f9d48bc6d19ef9abb/FLAG4e2e856fa [2022-07-21 08:54:07,003 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:54:07,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-07-21 08:54:07,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c01f13030/e4463baec1264f0f9d48bc6d19ef9abb/FLAG4e2e856fa [2022-07-21 08:54:07,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c01f13030/e4463baec1264f0f9d48bc6d19ef9abb [2022-07-21 08:54:07,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:54:07,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:54:07,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:54:07,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:54:07,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:54:07,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ebeea38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07, skipping insertion in model container [2022-07-21 08:54:07,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:54:07,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:54:07,277 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c[2237,2250] [2022-07-21 08:54:07,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:54:07,321 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:54:07,357 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c[2237,2250] [2022-07-21 08:54:07,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:54:07,372 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:54:07,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07 WrapperNode [2022-07-21 08:54:07,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:54:07,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:54:07,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:54:07,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:54:07,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,429 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-07-21 08:54:07,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:54:07,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:54:07,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:54:07,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:54:07,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:54:07,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:54:07,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:54:07,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:54:07,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (1/1) ... [2022-07-21 08:54:07,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:54:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:07,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:54:07,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:54:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:54:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 08:54:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 08:54:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 08:54:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 08:54:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 08:54:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 08:54:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-21 08:54:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-21 08:54:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:54:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:54:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:54:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:54:07,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:54:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:54:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:54:07,561 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:54:07,647 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:54:07,649 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:54:07,945 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:54:07,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:54:07,967 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 08:54:07,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:54:07 BoogieIcfgContainer [2022-07-21 08:54:07,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:54:07,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:54:07,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:54:07,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:54:07,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:54:07" (1/3) ... [2022-07-21 08:54:07,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f95663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:54:07, skipping insertion in model container [2022-07-21 08:54:07,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:54:07" (2/3) ... [2022-07-21 08:54:07,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f95663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:54:07, skipping insertion in model container [2022-07-21 08:54:08,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:54:07" (3/3) ... [2022-07-21 08:54:08,005 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2022-07-21 08:54:08,010 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:54:08,023 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:54:08,023 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:54:08,024 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:54:08,138 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:54:08,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 128 places, 125 transitions, 282 flow [2022-07-21 08:54:08,270 INFO L129 PetriNetUnfolder]: 10/121 cut-off events. [2022-07-21 08:54:08,271 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:54:08,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 121 events. 10/121 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2022-07-21 08:54:08,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 125 transitions, 282 flow [2022-07-21 08:54:08,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 108 transitions, 240 flow [2022-07-21 08:54:08,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:54:08,307 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@6d380328, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@73a33c11 [2022-07-21 08:54:08,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:54:08,352 INFO L129 PetriNetUnfolder]: 10/107 cut-off events. [2022-07-21 08:54:08,352 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:54:08,352 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:08,353 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:08,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 129648811, now seen corresponding path program 1 times [2022-07-21 08:54:08,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:08,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505712650] [2022-07-21 08:54:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:08,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:08,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:08,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505712650] [2022-07-21 08:54:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505712650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:08,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:08,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:54:08,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247387948] [2022-07-21 08:54:08,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:08,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:54:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:54:08,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:54:08,703 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 125 [2022-07-21 08:54:08,708 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 108 transitions, 240 flow. Second operand has 2 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:08,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:08,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 125 [2022-07-21 08:54:08,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:08,781 INFO L129 PetriNetUnfolder]: 4/102 cut-off events. [2022-07-21 08:54:08,781 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:54:08,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 102 events. 4/102 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 18/114 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-07-21 08:54:08,784 INFO L132 encePairwiseOnDemand]: 119/125 looper letters, 8 selfloop transitions, 0 changer transitions 2/102 dead transitions. [2022-07-21 08:54:08,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 102 transitions, 244 flow [2022-07-21 08:54:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:54:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:54:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 234 transitions. [2022-07-21 08:54:08,800 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.936 [2022-07-21 08:54:08,801 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 234 transitions. [2022-07-21 08:54:08,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 234 transitions. [2022-07-21 08:54:08,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:08,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 234 transitions. [2022-07-21 08:54:08,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:08,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:08,813 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:08,815 INFO L186 Difference]: Start difference. First operand has 111 places, 108 transitions, 240 flow. Second operand 2 states and 234 transitions. [2022-07-21 08:54:08,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 102 transitions, 244 flow [2022-07-21 08:54:08,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-21 08:54:08,822 INFO L242 Difference]: Finished difference. Result has 104 places, 100 transitions, 208 flow [2022-07-21 08:54:08,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=208, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-07-21 08:54:08,828 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, -7 predicate places. [2022-07-21 08:54:08,828 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 208 flow [2022-07-21 08:54:08,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:08,829 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:08,829 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:08,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:54:08,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash 560355165, now seen corresponding path program 1 times [2022-07-21 08:54:08,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:08,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353376925] [2022-07-21 08:54:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:08,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:09,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:09,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353376925] [2022-07-21 08:54:09,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353376925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:09,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:09,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:54:09,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750339179] [2022-07-21 08:54:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:09,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:54:09,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:54:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:54:09,325 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 125 [2022-07-21 08:54:09,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:09,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 125 [2022-07-21 08:54:09,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:09,806 INFO L129 PetriNetUnfolder]: 895/1458 cut-off events. [2022-07-21 08:54:09,806 INFO L130 PetriNetUnfolder]: For 80/134 co-relation queries the response was YES. [2022-07-21 08:54:09,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2774 conditions, 1458 events. 895/1458 cut-off events. For 80/134 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6472 event pairs, 272 based on Foata normal form. 1/1011 useless extension candidates. Maximal degree in co-relation 2771. Up to 796 conditions per place. [2022-07-21 08:54:09,821 INFO L132 encePairwiseOnDemand]: 115/125 looper letters, 47 selfloop transitions, 7 changer transitions 4/122 dead transitions. [2022-07-21 08:54:09,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 122 transitions, 375 flow [2022-07-21 08:54:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:54:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 08:54:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2022-07-21 08:54:09,828 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7074285714285714 [2022-07-21 08:54:09,828 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2022-07-21 08:54:09,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2022-07-21 08:54:09,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:09,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2022-07-21 08:54:09,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,838 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,838 INFO L186 Difference]: Start difference. First operand has 104 places, 100 transitions, 208 flow. Second operand 7 states and 619 transitions. [2022-07-21 08:54:09,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 122 transitions, 375 flow [2022-07-21 08:54:09,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 122 transitions, 375 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:54:09,844 INFO L242 Difference]: Finished difference. Result has 111 places, 104 transitions, 249 flow [2022-07-21 08:54:09,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=111, PETRI_TRANSITIONS=104} [2022-07-21 08:54:09,845 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 0 predicate places. [2022-07-21 08:54:09,845 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 104 transitions, 249 flow [2022-07-21 08:54:09,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:09,846 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:09,847 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:09,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:54:09,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:09,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1559793883, now seen corresponding path program 1 times [2022-07-21 08:54:09,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:09,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323875773] [2022-07-21 08:54:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:09,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:10,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323875773] [2022-07-21 08:54:10,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323875773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:10,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:10,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:54:10,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599084588] [2022-07-21 08:54:10,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:10,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:54:10,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:54:10,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:54:10,114 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 125 [2022-07-21 08:54:10,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 104 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:10,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:10,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 125 [2022-07-21 08:54:10,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:10,477 INFO L129 PetriNetUnfolder]: 1043/2032 cut-off events. [2022-07-21 08:54:10,477 INFO L130 PetriNetUnfolder]: For 229/268 co-relation queries the response was YES. [2022-07-21 08:54:10,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4006 conditions, 2032 events. 1043/2032 cut-off events. For 229/268 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11929 event pairs, 266 based on Foata normal form. 1/1431 useless extension candidates. Maximal degree in co-relation 3999. Up to 512 conditions per place. [2022-07-21 08:54:10,498 INFO L132 encePairwiseOnDemand]: 112/125 looper letters, 58 selfloop transitions, 19 changer transitions 0/147 dead transitions. [2022-07-21 08:54:10,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 147 transitions, 522 flow [2022-07-21 08:54:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:54:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 08:54:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 662 transitions. [2022-07-21 08:54:10,506 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7565714285714286 [2022-07-21 08:54:10,507 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 662 transitions. [2022-07-21 08:54:10,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 662 transitions. [2022-07-21 08:54:10,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:10,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 662 transitions. [2022-07-21 08:54:10,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.57142857142857) internal successors, (662), 7 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:10,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:10,513 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:10,513 INFO L186 Difference]: Start difference. First operand has 111 places, 104 transitions, 249 flow. Second operand 7 states and 662 transitions. [2022-07-21 08:54:10,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 147 transitions, 522 flow [2022-07-21 08:54:10,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 147 transitions, 503 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-21 08:54:10,523 INFO L242 Difference]: Finished difference. Result has 113 places, 114 transitions, 342 flow [2022-07-21 08:54:10,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=113, PETRI_TRANSITIONS=114} [2022-07-21 08:54:10,525 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 2 predicate places. [2022-07-21 08:54:10,526 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 114 transitions, 342 flow [2022-07-21 08:54:10,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:10,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:10,527 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:10,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:54:10,527 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 920643877, now seen corresponding path program 1 times [2022-07-21 08:54:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:10,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864988555] [2022-07-21 08:54:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:10,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:10,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864988555] [2022-07-21 08:54:10,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864988555] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:10,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291918628] [2022-07-21 08:54:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:10,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:10,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:10,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:54:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:10,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:54:10,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:11,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:11,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291918628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:11,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:11,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-21 08:54:11,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438267519] [2022-07-21 08:54:11,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:11,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 08:54:11,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:11,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 08:54:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-21 08:54:11,448 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-21 08:54:11,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 114 transitions, 342 flow. Second operand has 14 states, 14 states have (on average 81.71428571428571) internal successors, (1144), 14 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:11,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:11,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-21 08:54:11,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:12,725 INFO L129 PetriNetUnfolder]: 2556/4598 cut-off events. [2022-07-21 08:54:12,725 INFO L130 PetriNetUnfolder]: For 3486/3505 co-relation queries the response was YES. [2022-07-21 08:54:12,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 4598 events. 2556/4598 cut-off events. For 3486/3505 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29747 event pairs, 270 based on Foata normal form. 1/4004 useless extension candidates. Maximal degree in co-relation 11811. Up to 1129 conditions per place. [2022-07-21 08:54:12,771 INFO L132 encePairwiseOnDemand]: 110/125 looper letters, 175 selfloop transitions, 30 changer transitions 1/268 dead transitions. [2022-07-21 08:54:12,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 268 transitions, 1440 flow [2022-07-21 08:54:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:54:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 08:54:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1252 transitions. [2022-07-21 08:54:12,775 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7154285714285714 [2022-07-21 08:54:12,775 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1252 transitions. [2022-07-21 08:54:12,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1252 transitions. [2022-07-21 08:54:12,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:12,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1252 transitions. [2022-07-21 08:54:12,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.42857142857143) internal successors, (1252), 14 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:12,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:12,783 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:12,783 INFO L186 Difference]: Start difference. First operand has 113 places, 114 transitions, 342 flow. Second operand 14 states and 1252 transitions. [2022-07-21 08:54:12,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 268 transitions, 1440 flow [2022-07-21 08:54:12,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 268 transitions, 1436 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:54:12,814 INFO L242 Difference]: Finished difference. Result has 133 places, 132 transitions, 549 flow [2022-07-21 08:54:12,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=549, PETRI_PLACES=133, PETRI_TRANSITIONS=132} [2022-07-21 08:54:12,816 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 22 predicate places. [2022-07-21 08:54:12,816 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 132 transitions, 549 flow [2022-07-21 08:54:12,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.71428571428571) internal successors, (1144), 14 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:12,818 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:12,818 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:12,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:13,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:13,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash -571222771, now seen corresponding path program 2 times [2022-07-21 08:54:13,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:13,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204191168] [2022-07-21 08:54:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:13,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:13,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:13,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204191168] [2022-07-21 08:54:13,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204191168] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:13,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:13,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:54:13,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756497478] [2022-07-21 08:54:13,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:13,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:54:13,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:54:13,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:54:13,269 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-21 08:54:13,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 132 transitions, 549 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:13,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:13,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-21 08:54:13,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:13,979 INFO L129 PetriNetUnfolder]: 2506/4537 cut-off events. [2022-07-21 08:54:13,979 INFO L130 PetriNetUnfolder]: For 9876/9971 co-relation queries the response was YES. [2022-07-21 08:54:13,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15051 conditions, 4537 events. 2506/4537 cut-off events. For 9876/9971 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29778 event pairs, 896 based on Foata normal form. 26/4246 useless extension candidates. Maximal degree in co-relation 15034. Up to 3151 conditions per place. [2022-07-21 08:54:14,028 INFO L132 encePairwiseOnDemand]: 114/125 looper letters, 81 selfloop transitions, 15 changer transitions 2/160 dead transitions. [2022-07-21 08:54:14,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 885 flow [2022-07-21 08:54:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:54:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:54:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 538 transitions. [2022-07-21 08:54:14,031 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7173333333333334 [2022-07-21 08:54:14,031 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 538 transitions. [2022-07-21 08:54:14,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 538 transitions. [2022-07-21 08:54:14,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:14,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 538 transitions. [2022-07-21 08:54:14,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,035 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,035 INFO L186 Difference]: Start difference. First operand has 133 places, 132 transitions, 549 flow. Second operand 6 states and 538 transitions. [2022-07-21 08:54:14,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 885 flow [2022-07-21 08:54:14,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 160 transitions, 868 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 08:54:14,049 INFO L242 Difference]: Finished difference. Result has 136 places, 134 transitions, 587 flow [2022-07-21 08:54:14,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=587, PETRI_PLACES=136, PETRI_TRANSITIONS=134} [2022-07-21 08:54:14,050 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 25 predicate places. [2022-07-21 08:54:14,051 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 134 transitions, 587 flow [2022-07-21 08:54:14,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:14,051 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:14,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:54:14,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1166830447, now seen corresponding path program 2 times [2022-07-21 08:54:14,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:14,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229930704] [2022-07-21 08:54:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:14,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:14,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:14,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229930704] [2022-07-21 08:54:14,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229930704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:14,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:14,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:54:14,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913017685] [2022-07-21 08:54:14,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:14,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:54:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:54:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:54:14,225 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-21 08:54:14,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 134 transitions, 587 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:14,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-21 08:54:14,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:14,893 INFO L129 PetriNetUnfolder]: 2307/4169 cut-off events. [2022-07-21 08:54:14,893 INFO L130 PetriNetUnfolder]: For 10203/10286 co-relation queries the response was YES. [2022-07-21 08:54:14,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14651 conditions, 4169 events. 2307/4169 cut-off events. For 10203/10286 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26701 event pairs, 1058 based on Foata normal form. 32/3915 useless extension candidates. Maximal degree in co-relation 14631. Up to 2939 conditions per place. [2022-07-21 08:54:14,955 INFO L132 encePairwiseOnDemand]: 114/125 looper letters, 82 selfloop transitions, 18 changer transitions 5/167 dead transitions. [2022-07-21 08:54:14,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 167 transitions, 1009 flow [2022-07-21 08:54:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:54:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:54:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 538 transitions. [2022-07-21 08:54:14,958 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7173333333333334 [2022-07-21 08:54:14,958 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 538 transitions. [2022-07-21 08:54:14,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 538 transitions. [2022-07-21 08:54:14,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:14,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 538 transitions. [2022-07-21 08:54:14,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,962 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,962 INFO L186 Difference]: Start difference. First operand has 136 places, 134 transitions, 587 flow. Second operand 6 states and 538 transitions. [2022-07-21 08:54:14,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 167 transitions, 1009 flow [2022-07-21 08:54:14,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 167 transitions, 987 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-21 08:54:14,978 INFO L242 Difference]: Finished difference. Result has 140 places, 139 transitions, 689 flow [2022-07-21 08:54:14,979 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=689, PETRI_PLACES=140, PETRI_TRANSITIONS=139} [2022-07-21 08:54:14,980 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 29 predicate places. [2022-07-21 08:54:14,980 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 139 transitions, 689 flow [2022-07-21 08:54:14,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:14,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:14,981 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:14,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:54:14,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash 557506817, now seen corresponding path program 1 times [2022-07-21 08:54:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:14,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338002681] [2022-07-21 08:54:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:14,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:15,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:15,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338002681] [2022-07-21 08:54:15,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338002681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:15,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901317492] [2022-07-21 08:54:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:15,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:15,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:15,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:15,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:54:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:54:15,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:15,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:15,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901317492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:15,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:15,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-21 08:54:15,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847942735] [2022-07-21 08:54:15,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:15,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 08:54:15,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 08:54:15,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-21 08:54:15,799 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-21 08:54:15,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 139 transitions, 689 flow. Second operand has 14 states, 14 states have (on average 82.28571428571429) internal successors, (1152), 14 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:15,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:15,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-21 08:54:15,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:17,080 INFO L129 PetriNetUnfolder]: 3235/5863 cut-off events. [2022-07-21 08:54:17,080 INFO L130 PetriNetUnfolder]: For 16618/16722 co-relation queries the response was YES. [2022-07-21 08:54:17,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21013 conditions, 5863 events. 3235/5863 cut-off events. For 16618/16722 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40482 event pairs, 458 based on Foata normal form. 177/5802 useless extension candidates. Maximal degree in co-relation 20991. Up to 1542 conditions per place. [2022-07-21 08:54:17,145 INFO L132 encePairwiseOnDemand]: 110/125 looper letters, 206 selfloop transitions, 34 changer transitions 2/304 dead transitions. [2022-07-21 08:54:17,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 304 transitions, 2235 flow [2022-07-21 08:54:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:54:17,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 08:54:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1248 transitions. [2022-07-21 08:54:17,148 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7131428571428572 [2022-07-21 08:54:17,148 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1248 transitions. [2022-07-21 08:54:17,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1248 transitions. [2022-07-21 08:54:17,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:17,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1248 transitions. [2022-07-21 08:54:17,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.14285714285714) internal successors, (1248), 14 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:17,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:17,156 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:17,156 INFO L186 Difference]: Start difference. First operand has 140 places, 139 transitions, 689 flow. Second operand 14 states and 1248 transitions. [2022-07-21 08:54:17,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 304 transitions, 2235 flow [2022-07-21 08:54:17,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 304 transitions, 2157 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-07-21 08:54:17,184 INFO L242 Difference]: Finished difference. Result has 157 places, 149 transitions, 842 flow [2022-07-21 08:54:17,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=842, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2022-07-21 08:54:17,185 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 46 predicate places. [2022-07-21 08:54:17,185 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 842 flow [2022-07-21 08:54:17,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.28571428571429) internal successors, (1152), 14 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:17,186 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:17,186 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:17,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:17,399 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,SelfDestructingSolverStorable6 [2022-07-21 08:54:17,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1750943981, now seen corresponding path program 2 times [2022-07-21 08:54:17,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:17,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606784234] [2022-07-21 08:54:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:17,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:17,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:17,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606784234] [2022-07-21 08:54:17,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606784234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:54:17,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:54:17,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:54:17,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620216180] [2022-07-21 08:54:17,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:54:17,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:54:17,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:54:17,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:54:17,567 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-21 08:54:17,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 842 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:17,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:17,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-21 08:54:17,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:18,443 INFO L129 PetriNetUnfolder]: 3125/5514 cut-off events. [2022-07-21 08:54:18,443 INFO L130 PetriNetUnfolder]: For 18961/19023 co-relation queries the response was YES. [2022-07-21 08:54:18,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22407 conditions, 5514 events. 3125/5514 cut-off events. For 18961/19023 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37200 event pairs, 848 based on Foata normal form. 10/5332 useless extension candidates. Maximal degree in co-relation 22379. Up to 4139 conditions per place. [2022-07-21 08:54:18,632 INFO L132 encePairwiseOnDemand]: 115/125 looper letters, 89 selfloop transitions, 17 changer transitions 8/176 dead transitions. [2022-07-21 08:54:18,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 176 transitions, 1224 flow [2022-07-21 08:54:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:54:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:54:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2022-07-21 08:54:18,635 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.716 [2022-07-21 08:54:18,635 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2022-07-21 08:54:18,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2022-07-21 08:54:18,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:18,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2022-07-21 08:54:18,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:18,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:18,639 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:18,639 INFO L186 Difference]: Start difference. First operand has 157 places, 149 transitions, 842 flow. Second operand 6 states and 537 transitions. [2022-07-21 08:54:18,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 176 transitions, 1224 flow [2022-07-21 08:54:18,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 176 transitions, 1189 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-21 08:54:18,701 INFO L242 Difference]: Finished difference. Result has 159 places, 150 transitions, 858 flow [2022-07-21 08:54:18,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=858, PETRI_PLACES=159, PETRI_TRANSITIONS=150} [2022-07-21 08:54:18,704 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 48 predicate places. [2022-07-21 08:54:18,704 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 150 transitions, 858 flow [2022-07-21 08:54:18,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:18,705 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:18,705 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:18,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:54:18,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:18,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1325521599, now seen corresponding path program 3 times [2022-07-21 08:54:18,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:18,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45610699] [2022-07-21 08:54:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:18,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:18,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45610699] [2022-07-21 08:54:18,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45610699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:18,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045302296] [2022-07-21 08:54:18,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:54:18,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:18,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:18,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:18,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:54:18,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 08:54:18,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:54:18,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:54:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:19,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:19,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045302296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:19,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:19,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-21 08:54:19,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966329212] [2022-07-21 08:54:19,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:19,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:54:19,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:19,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:54:19,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:54:19,356 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 125 [2022-07-21 08:54:19,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 150 transitions, 858 flow. Second operand has 10 states, 10 states have (on average 88.4) internal successors, (884), 10 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:19,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:19,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 125 [2022-07-21 08:54:19,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:20,267 INFO L129 PetriNetUnfolder]: 3265/6219 cut-off events. [2022-07-21 08:54:20,267 INFO L130 PetriNetUnfolder]: For 20783/20885 co-relation queries the response was YES. [2022-07-21 08:54:20,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24384 conditions, 6219 events. 3265/6219 cut-off events. For 20783/20885 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 46909 event pairs, 373 based on Foata normal form. 158/6131 useless extension candidates. Maximal degree in co-relation 24353. Up to 2069 conditions per place. [2022-07-21 08:54:20,471 INFO L132 encePairwiseOnDemand]: 112/125 looper letters, 131 selfloop transitions, 30 changer transitions 0/240 dead transitions. [2022-07-21 08:54:20,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 240 transitions, 1771 flow [2022-07-21 08:54:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 08:54:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 08:54:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1106 transitions. [2022-07-21 08:54:20,474 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7373333333333333 [2022-07-21 08:54:20,474 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1106 transitions. [2022-07-21 08:54:20,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1106 transitions. [2022-07-21 08:54:20,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:20,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1106 transitions. [2022-07-21 08:54:20,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.16666666666667) internal successors, (1106), 12 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:20,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:20,481 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:20,481 INFO L186 Difference]: Start difference. First operand has 159 places, 150 transitions, 858 flow. Second operand 12 states and 1106 transitions. [2022-07-21 08:54:20,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 240 transitions, 1771 flow [2022-07-21 08:54:20,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 240 transitions, 1746 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-07-21 08:54:20,553 INFO L242 Difference]: Finished difference. Result has 170 places, 158 transitions, 996 flow [2022-07-21 08:54:20,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=996, PETRI_PLACES=170, PETRI_TRANSITIONS=158} [2022-07-21 08:54:20,554 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 59 predicate places. [2022-07-21 08:54:20,554 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 158 transitions, 996 flow [2022-07-21 08:54:20,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.4) internal successors, (884), 10 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:20,555 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:20,555 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:20,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:20,771 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 [2022-07-21 08:54:20,772 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash -13600267, now seen corresponding path program 1 times [2022-07-21 08:54:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:20,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977745622] [2022-07-21 08:54:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:20,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:20,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977745622] [2022-07-21 08:54:20,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977745622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:20,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069829204] [2022-07-21 08:54:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:20,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:20,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:20,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:20,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:54:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:21,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:54:21,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:21,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:54:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:21,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069829204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:54:21,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:54:21,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-21 08:54:21,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815489058] [2022-07-21 08:54:21,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:54:21,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 08:54:21,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:54:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 08:54:21,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-21 08:54:21,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-21 08:54:21,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 158 transitions, 996 flow. Second operand has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:21,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:54:21,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-21 08:54:21,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:54:23,242 INFO L129 PetriNetUnfolder]: 5063/8597 cut-off events. [2022-07-21 08:54:23,243 INFO L130 PetriNetUnfolder]: For 40129/40192 co-relation queries the response was YES. [2022-07-21 08:54:23,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38136 conditions, 8597 events. 5063/8597 cut-off events. For 40129/40192 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 60765 event pairs, 980 based on Foata normal form. 132/8573 useless extension candidates. Maximal degree in co-relation 38103. Up to 3224 conditions per place. [2022-07-21 08:54:23,350 INFO L132 encePairwiseOnDemand]: 110/125 looper letters, 296 selfloop transitions, 32 changer transitions 2/392 dead transitions. [2022-07-21 08:54:23,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 392 transitions, 3771 flow [2022-07-21 08:54:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:54:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 08:54:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1246 transitions. [2022-07-21 08:54:23,354 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.712 [2022-07-21 08:54:23,354 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1246 transitions. [2022-07-21 08:54:23,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1246 transitions. [2022-07-21 08:54:23,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:54:23,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1246 transitions. [2022-07-21 08:54:23,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:23,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:23,362 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:23,362 INFO L186 Difference]: Start difference. First operand has 170 places, 158 transitions, 996 flow. Second operand 14 states and 1246 transitions. [2022-07-21 08:54:23,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 392 transitions, 3771 flow [2022-07-21 08:54:23,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 392 transitions, 3571 flow, removed 70 selfloop flow, removed 6 redundant places. [2022-07-21 08:54:23,550 INFO L242 Difference]: Finished difference. Result has 181 places, 164 transitions, 1091 flow [2022-07-21 08:54:23,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1091, PETRI_PLACES=181, PETRI_TRANSITIONS=164} [2022-07-21 08:54:23,552 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 70 predicate places. [2022-07-21 08:54:23,553 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 164 transitions, 1091 flow [2022-07-21 08:54:23,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:54:23,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:54:23,554 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:54:23,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:54:23,767 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 [2022-07-21 08:54:23,767 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:54:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:54:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash -95233455, now seen corresponding path program 1 times [2022-07-21 08:54:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:54:23,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958884416] [2022-07-21 08:54:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:23,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:54:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:24,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:54:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958884416] [2022-07-21 08:54:24,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958884416] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:54:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637578009] [2022-07-21 08:54:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:54:24,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:54:24,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:54:24,287 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:54:24,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:54:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:54:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 08:54:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:54:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:54:48,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:55:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:55:07,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637578009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:55:07,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:55:07,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-07-21 08:55:07,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891568645] [2022-07-21 08:55:07,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:55:07,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 08:55:07,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:55:07,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 08:55:07,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=545, Unknown=4, NotChecked=0, Total=702 [2022-07-21 08:55:07,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-21 08:55:07,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 164 transitions, 1091 flow. Second operand has 27 states, 27 states have (on average 80.5925925925926) internal successors, (2176), 27 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:55:07,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:55:07,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-21 08:55:07,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:55:20,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:22,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:24,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:26,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:28,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:30,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:32,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:34,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:36,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:38,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:40,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:42,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:44,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:46,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:47,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:50,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:55:52,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:24,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:25,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:27,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:29,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:30,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:37,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:40,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:43,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:46,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:48,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:50,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:52,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:54,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:56:58,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:01,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:04,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:15,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:17,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:20,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:21,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:29,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:33,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:35,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:57:46,707 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 57 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 08:57:46,913 INFO L129 PetriNetUnfolder]: 10808/18710 cut-off events. [2022-07-21 08:57:46,914 INFO L130 PetriNetUnfolder]: For 96191/96451 co-relation queries the response was YES. [2022-07-21 08:57:47,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84967 conditions, 18710 events. 10808/18710 cut-off events. For 96191/96451 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 152929 event pairs, 1131 based on Foata normal form. 81/18293 useless extension candidates. Maximal degree in co-relation 84930. Up to 8886 conditions per place. [2022-07-21 08:57:47,195 INFO L132 encePairwiseOnDemand]: 102/125 looper letters, 381 selfloop transitions, 217 changer transitions 24/684 dead transitions. [2022-07-21 08:57:47,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 684 transitions, 6802 flow [2022-07-21 08:57:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 08:57:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 08:57:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2748 transitions. [2022-07-21 08:57:47,203 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7091612903225807 [2022-07-21 08:57:47,203 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2748 transitions. [2022-07-21 08:57:47,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2748 transitions. [2022-07-21 08:57:47,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:57:47,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2748 transitions. [2022-07-21 08:57:47,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 88.64516129032258) internal successors, (2748), 31 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:57:47,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 125.0) internal successors, (4000), 32 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:57:47,221 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 125.0) internal successors, (4000), 32 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:57:47,221 INFO L186 Difference]: Start difference. First operand has 181 places, 164 transitions, 1091 flow. Second operand 31 states and 2748 transitions. [2022-07-21 08:57:47,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 684 transitions, 6802 flow [2022-07-21 08:57:47,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 684 transitions, 6645 flow, removed 54 selfloop flow, removed 8 redundant places. [2022-07-21 08:57:47,686 INFO L242 Difference]: Finished difference. Result has 218 places, 362 transitions, 3878 flow [2022-07-21 08:57:47,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3878, PETRI_PLACES=218, PETRI_TRANSITIONS=362} [2022-07-21 08:57:47,687 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 107 predicate places. [2022-07-21 08:57:47,687 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 362 transitions, 3878 flow [2022-07-21 08:57:47,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 80.5925925925926) internal successors, (2176), 27 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:57:47,688 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:57:47,688 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:57:47,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:57:47,894 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 [2022-07-21 08:57:47,894 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:57:47,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:57:47,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1339608379, now seen corresponding path program 1 times [2022-07-21 08:57:47,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:57:47,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103484452] [2022-07-21 08:57:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:57:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:57:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:57:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:57:48,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:57:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103484452] [2022-07-21 08:57:48,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103484452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:57:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585464696] [2022-07-21 08:57:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:57:48,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:57:48,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:57:48,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:57:48,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:57:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:57:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 08:57:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:57:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:57:58,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:58:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:58:21,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585464696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:58:21,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:58:21,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-07-21 08:58:21,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627584497] [2022-07-21 08:58:21,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:58:21,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 08:58:21,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:58:21,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 08:58:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=542, Unknown=3, NotChecked=0, Total=702 [2022-07-21 08:58:21,878 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-21 08:58:21,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 362 transitions, 3878 flow. Second operand has 27 states, 27 states have (on average 80.74074074074075) internal successors, (2180), 27 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:58:21,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:58:21,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-21 08:58:21,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:58:26,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:58:28,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:58:30,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:58:32,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:58:35,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:58:37,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []