./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-vector-add.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 f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:37:30,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:37:30,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:37:30,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:37:30,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:37:30,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:37:30,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:37:30,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:37:30,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:37:30,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:37:30,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:37:30,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:37:30,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:37:30,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:37:30,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:37:30,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:37:30,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:37:30,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:37:30,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:37:30,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:37:30,122 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:37:30,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:37:30,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:37:30,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:37:30,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:37:30,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:37:30,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:37:30,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:37:30,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:37:30,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:37:30,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:37:30,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:37:30,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:37:30,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:37:30,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:37:30,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:37:30,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:37:30,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:37:30,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:37:30,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:37:30,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:37:30,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:37:30,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:37:30,158 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:37:30,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:37:30,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:37:30,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:37:30,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:37:30,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:37:30,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:37:30,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:37:30,161 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:37:30,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:37:30,161 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:37:30,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:37:30,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:37:30,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:37:30,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:37:30,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:37:30,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:37:30,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:37:30,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:37:30,162 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:37:30,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:37:30,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:37:30,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:37:30,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:37:30,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:37:30,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:37:30,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:37:30,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:37:30,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:37:30,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:37:30,164 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:37:30,164 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:37:30,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:37:30,164 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d [2022-07-12 10:37:30,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:37:30,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:37:30,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:37:30,373 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:37:30,373 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:37:30,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2022-07-12 10:37:30,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31897483e/fd041d5028ac4cd2aea2b880a5a1f97e/FLAGbdea2368f [2022-07-12 10:37:30,742 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:37:30,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2022-07-12 10:37:30,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31897483e/fd041d5028ac4cd2aea2b880a5a1f97e/FLAGbdea2368f [2022-07-12 10:37:31,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31897483e/fd041d5028ac4cd2aea2b880a5a1f97e [2022-07-12 10:37:31,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:37:31,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:37:31,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:37:31,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:37:31,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:37:31,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@378ae0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31, skipping insertion in model container [2022-07-12 10:37:31,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:37:31,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:37:31,337 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c[2598,2611] [2022-07-12 10:37:31,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:37:31,357 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:37:31,388 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c[2598,2611] [2022-07-12 10:37:31,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:37:31,402 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:37:31,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31 WrapperNode [2022-07-12 10:37:31,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:37:31,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:37:31,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:37:31,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:37:31,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,449 INFO L137 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 11, calls inlined = 17, statements flattened = 193 [2022-07-12 10:37:31,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:37:31,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:37:31,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:37:31,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:37:31,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:37:31,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:37:31,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:37:31,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:37:31,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (1/1) ... [2022-07-12 10:37:31,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:37:31,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:31,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:37:31,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:37:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:37:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:37:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:37:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:37:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:37:31,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:37:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:37:31,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:37:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:37:31,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:37:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:37:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:37:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:37:31,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:37:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:37:31,551 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:37:31,633 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:37:31,634 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:37:31,920 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:37:31,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:37:31,927 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-12 10:37:31,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:37:31 BoogieIcfgContainer [2022-07-12 10:37:31,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:37:31,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:37:31,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:37:31,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:37:31,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:37:31" (1/3) ... [2022-07-12 10:37:31,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fce1c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:37:31, skipping insertion in model container [2022-07-12 10:37:31,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:31" (2/3) ... [2022-07-12 10:37:31,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fce1c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:37:31, skipping insertion in model container [2022-07-12 10:37:31,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:37:31" (3/3) ... [2022-07-12 10:37:31,934 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-vector-add.wvr.c [2022-07-12 10:37:31,938 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:37:31,944 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:37:31,944 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:37:31,944 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:37:32,012 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:37:32,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 279 places, 294 transitions, 612 flow [2022-07-12 10:37:32,126 INFO L129 PetriNetUnfolder]: 25/291 cut-off events. [2022-07-12 10:37:32,127 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:37:32,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 291 events. 25/291 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 177 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 234. Up to 2 conditions per place. [2022-07-12 10:37:32,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 294 transitions, 612 flow [2022-07-12 10:37:32,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 280 transitions, 578 flow [2022-07-12 10:37:32,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:37:32,172 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@1e8dc1b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@70cf795c [2022-07-12 10:37:32,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:37:32,232 INFO L129 PetriNetUnfolder]: 25/279 cut-off events. [2022-07-12 10:37:32,235 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:37:32,235 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:32,236 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:32,237 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 1 more)] === [2022-07-12 10:37:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash 968961542, now seen corresponding path program 1 times [2022-07-12 10:37:32,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:32,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45039237] [2022-07-12 10:37:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:32,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:32,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:32,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45039237] [2022-07-12 10:37:32,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45039237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:32,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:32,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:37:32,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281655054] [2022-07-12 10:37:32,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:32,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:37:32,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:32,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:37:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:37:32,530 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 294 [2022-07-12 10:37:32,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 280 transitions, 578 flow. Second operand has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:32,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:32,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 294 [2022-07-12 10:37:32,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:32,589 INFO L129 PetriNetUnfolder]: 7/262 cut-off events. [2022-07-12 10:37:32,589 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-12 10:37:32,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 262 events. 7/262 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 24/268 useless extension candidates. Maximal degree in co-relation 221. Up to 7 conditions per place. [2022-07-12 10:37:32,592 INFO L132 encePairwiseOnDemand]: 276/294 looper letters, 6 selfloop transitions, 0 changer transitions 11/262 dead transitions. [2022-07-12 10:37:32,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 262 transitions, 554 flow [2022-07-12 10:37:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:37:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:37:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 562 transitions. [2022-07-12 10:37:32,609 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.95578231292517 [2022-07-12 10:37:32,610 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 562 transitions. [2022-07-12 10:37:32,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 562 transitions. [2022-07-12 10:37:32,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:32,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 562 transitions. [2022-07-12 10:37:32,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 281.0) internal successors, (562), 2 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:32,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:32,639 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:32,640 INFO L186 Difference]: Start difference. First operand has 265 places, 280 transitions, 578 flow. Second operand 2 states and 562 transitions. [2022-07-12 10:37:32,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 262 transitions, 554 flow [2022-07-12 10:37:32,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 262 transitions, 542 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:37:32,650 INFO L242 Difference]: Finished difference. Result has 260 places, 251 transitions, 508 flow [2022-07-12 10:37:32,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=508, PETRI_PLACES=260, PETRI_TRANSITIONS=251} [2022-07-12 10:37:32,655 INFO L279 CegarLoopForPetriNet]: 265 programPoint places, -5 predicate places. [2022-07-12 10:37:32,655 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 251 transitions, 508 flow [2022-07-12 10:37:32,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:32,656 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:32,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:32,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:37:32,657 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 1 more)] === [2022-07-12 10:37:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:32,658 INFO L85 PathProgramCache]: Analyzing trace with hash -252625064, now seen corresponding path program 1 times [2022-07-12 10:37:32,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:32,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755716192] [2022-07-12 10:37:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:32,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:32,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:32,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755716192] [2022-07-12 10:37:32,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755716192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:32,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:32,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:37:32,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524752567] [2022-07-12 10:37:32,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:32,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:37:32,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:32,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:37:32,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:37:32,989 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 294 [2022-07-12 10:37:32,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 251 transitions, 508 flow. Second operand has 8 states, 8 states have (on average 177.75) internal successors, (1422), 8 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:32,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:32,994 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 294 [2022-07-12 10:37:32,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:33,389 INFO L129 PetriNetUnfolder]: 81/818 cut-off events. [2022-07-12 10:37:33,390 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-12 10:37:33,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 818 events. 81/818 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2990 event pairs, 36 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 1158. Up to 121 conditions per place. [2022-07-12 10:37:33,394 INFO L132 encePairwiseOnDemand]: 269/294 looper letters, 94 selfloop transitions, 18 changer transitions 111/378 dead transitions. [2022-07-12 10:37:33,394 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 378 transitions, 1220 flow [2022-07-12 10:37:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:37:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:37:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2409 transitions. [2022-07-12 10:37:33,399 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.630298273155416 [2022-07-12 10:37:33,399 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2409 transitions. [2022-07-12 10:37:33,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2409 transitions. [2022-07-12 10:37:33,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:33,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2409 transitions. [2022-07-12 10:37:33,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.30769230769232) internal successors, (2409), 13 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:33,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:33,411 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:33,411 INFO L186 Difference]: Start difference. First operand has 260 places, 251 transitions, 508 flow. Second operand 13 states and 2409 transitions. [2022-07-12 10:37:33,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 378 transitions, 1220 flow [2022-07-12 10:37:33,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 378 transitions, 1220 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:37:33,417 INFO L242 Difference]: Finished difference. Result has 268 places, 255 transitions, 594 flow [2022-07-12 10:37:33,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=594, PETRI_PLACES=268, PETRI_TRANSITIONS=255} [2022-07-12 10:37:33,418 INFO L279 CegarLoopForPetriNet]: 265 programPoint places, 3 predicate places. [2022-07-12 10:37:33,418 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 255 transitions, 594 flow [2022-07-12 10:37:33,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 177.75) internal successors, (1422), 8 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:33,419 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:33,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:33,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:37:33,420 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 1 more)] === [2022-07-12 10:37:33,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash 955285944, now seen corresponding path program 1 times [2022-07-12 10:37:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:33,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651815470] [2022-07-12 10:37:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:33,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:37:33,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651815470] [2022-07-12 10:37:33,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651815470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:33,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7895370] [2022-07-12 10:37:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:33,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:33,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:33,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:33,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:37:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:33,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:37:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:37:33,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:37:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:37:34,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7895370] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:34,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:37:34,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-12 10:37:34,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535125348] [2022-07-12 10:37:34,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:34,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:37:34,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:37:34,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:37:34,154 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 294 [2022-07-12 10:37:34,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 255 transitions, 594 flow. Second operand has 7 states, 7 states have (on average 215.71428571428572) internal successors, (1510), 7 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:34,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:34,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 294 [2022-07-12 10:37:34,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:34,274 INFO L129 PetriNetUnfolder]: 55/443 cut-off events. [2022-07-12 10:37:34,274 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-07-12 10:37:34,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 443 events. 55/443 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1025 event pairs, 27 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 666. Up to 97 conditions per place. [2022-07-12 10:37:34,277 INFO L132 encePairwiseOnDemand]: 286/294 looper letters, 71 selfloop transitions, 7 changer transitions 0/261 dead transitions. [2022-07-12 10:37:34,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 261 transitions, 764 flow [2022-07-12 10:37:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:37:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:37:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1524 transitions. [2022-07-12 10:37:34,280 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7405247813411079 [2022-07-12 10:37:34,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1524 transitions. [2022-07-12 10:37:34,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1524 transitions. [2022-07-12 10:37:34,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:34,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1524 transitions. [2022-07-12 10:37:34,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 217.71428571428572) internal successors, (1524), 7 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:34,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:34,287 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:34,287 INFO L186 Difference]: Start difference. First operand has 268 places, 255 transitions, 594 flow. Second operand 7 states and 1524 transitions. [2022-07-12 10:37:34,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 261 transitions, 764 flow [2022-07-12 10:37:34,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 261 transitions, 718 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-07-12 10:37:34,292 INFO L242 Difference]: Finished difference. Result has 260 places, 257 transitions, 581 flow [2022-07-12 10:37:34,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=581, PETRI_PLACES=260, PETRI_TRANSITIONS=257} [2022-07-12 10:37:34,294 INFO L279 CegarLoopForPetriNet]: 265 programPoint places, -5 predicate places. [2022-07-12 10:37:34,294 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 257 transitions, 581 flow [2022-07-12 10:37:34,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.71428571428572) internal successors, (1510), 7 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:34,295 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:34,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:34,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:34,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:34,510 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 1 more)] === [2022-07-12 10:37:34,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:34,510 INFO L85 PathProgramCache]: Analyzing trace with hash 461159547, now seen corresponding path program 1 times [2022-07-12 10:37:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:34,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505961156] [2022-07-12 10:37:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:34,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:34,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:34,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505961156] [2022-07-12 10:37:34,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505961156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:34,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363162887] [2022-07-12 10:37:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:34,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:34,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:34,631 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:34,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:37:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:34,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:37:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:34,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:37:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:35,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363162887] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:35,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:37:35,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-12 10:37:35,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395870442] [2022-07-12 10:37:35,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:35,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:37:35,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:35,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:37:35,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:37:35,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 294 [2022-07-12 10:37:35,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 257 transitions, 581 flow. Second operand has 9 states, 9 states have (on average 204.33333333333334) internal successors, (1839), 9 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:35,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:35,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 294 [2022-07-12 10:37:35,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:35,620 INFO L129 PetriNetUnfolder]: 1177/2432 cut-off events. [2022-07-12 10:37:35,620 INFO L130 PetriNetUnfolder]: For 1086/1524 co-relation queries the response was YES. [2022-07-12 10:37:35,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4946 conditions, 2432 events. 1177/2432 cut-off events. For 1086/1524 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14807 event pairs, 287 based on Foata normal form. 438/2678 useless extension candidates. Maximal degree in co-relation 4938. Up to 498 conditions per place. [2022-07-12 10:37:35,634 INFO L132 encePairwiseOnDemand]: 283/294 looper letters, 133 selfloop transitions, 17 changer transitions 0/323 dead transitions. [2022-07-12 10:37:35,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 323 transitions, 1064 flow [2022-07-12 10:37:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:37:35,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:37:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2308 transitions. [2022-07-12 10:37:35,658 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7136672850958565 [2022-07-12 10:37:35,658 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2308 transitions. [2022-07-12 10:37:35,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2308 transitions. [2022-07-12 10:37:35,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:35,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2308 transitions. [2022-07-12 10:37:35,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 209.8181818181818) internal successors, (2308), 11 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:35,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:35,667 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:35,668 INFO L186 Difference]: Start difference. First operand has 260 places, 257 transitions, 581 flow. Second operand 11 states and 2308 transitions. [2022-07-12 10:37:35,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 323 transitions, 1064 flow [2022-07-12 10:37:35,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 323 transitions, 1051 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:37:35,673 INFO L242 Difference]: Finished difference. Result has 270 places, 268 transitions, 661 flow [2022-07-12 10:37:35,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=661, PETRI_PLACES=270, PETRI_TRANSITIONS=268} [2022-07-12 10:37:35,674 INFO L279 CegarLoopForPetriNet]: 265 programPoint places, 5 predicate places. [2022-07-12 10:37:35,674 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 268 transitions, 661 flow [2022-07-12 10:37:35,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 204.33333333333334) internal successors, (1839), 9 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:35,675 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:35,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:35,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:35,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 10:37:35,910 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 1 more)] === [2022-07-12 10:37:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash 994210303, now seen corresponding path program 2 times [2022-07-12 10:37:35,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:35,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746164966] [2022-07-12 10:37:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:35,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:36,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:36,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746164966] [2022-07-12 10:37:36,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746164966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:36,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538527044] [2022-07-12 10:37:36,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:37:36,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:36,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:36,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:36,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:37:36,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:37:36,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:36,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:37:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:37:36,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:37:36,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538527044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:36,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:37:36,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-07-12 10:37:36,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55323258] [2022-07-12 10:37:36,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:37:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:37:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:37:36,246 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 294 [2022-07-12 10:37:36,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 268 transitions, 661 flow. Second operand has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:36,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:36,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 294 [2022-07-12 10:37:36,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:36,766 INFO L129 PetriNetUnfolder]: 1595/3269 cut-off events. [2022-07-12 10:37:36,766 INFO L130 PetriNetUnfolder]: For 2204/2762 co-relation queries the response was YES. [2022-07-12 10:37:36,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7319 conditions, 3269 events. 1595/3269 cut-off events. For 2204/2762 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21885 event pairs, 576 based on Foata normal form. 559/3698 useless extension candidates. Maximal degree in co-relation 7307. Up to 1008 conditions per place. [2022-07-12 10:37:36,818 INFO L132 encePairwiseOnDemand]: 283/294 looper letters, 143 selfloop transitions, 14 changer transitions 10/347 dead transitions. [2022-07-12 10:37:36,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 347 transitions, 1236 flow [2022-07-12 10:37:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:37:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:37:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1844 transitions. [2022-07-12 10:37:36,821 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6969009826152683 [2022-07-12 10:37:36,821 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1844 transitions. [2022-07-12 10:37:36,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1844 transitions. [2022-07-12 10:37:36,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:36,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1844 transitions. [2022-07-12 10:37:36,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 204.88888888888889) internal successors, (1844), 9 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:36,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:36,828 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:36,828 INFO L186 Difference]: Start difference. First operand has 270 places, 268 transitions, 661 flow. Second operand 9 states and 1844 transitions. [2022-07-12 10:37:36,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 347 transitions, 1236 flow [2022-07-12 10:37:36,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 347 transitions, 1229 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:37:36,837 INFO L242 Difference]: Finished difference. Result has 280 places, 275 transitions, 750 flow [2022-07-12 10:37:36,837 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=750, PETRI_PLACES=280, PETRI_TRANSITIONS=275} [2022-07-12 10:37:36,838 INFO L279 CegarLoopForPetriNet]: 265 programPoint places, 15 predicate places. [2022-07-12 10:37:36,838 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 275 transitions, 750 flow [2022-07-12 10:37:36,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:36,839 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:36,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:36,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:37,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:37,057 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 1 more)] === [2022-07-12 10:37:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash 159303151, now seen corresponding path program 3 times [2022-07-12 10:37:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:37,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804715554] [2022-07-12 10:37:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:37,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:37,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804715554] [2022-07-12 10:37:37,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804715554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384980529] [2022-07-12 10:37:37,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:37:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:37,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:37,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:37:37,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-12 10:37:37,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:37:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:37:37,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:37:37,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384980529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:37,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:37:37,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-07-12 10:37:37,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84186798] [2022-07-12 10:37:37,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:37,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:37:37,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:37,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:37:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:37:37,337 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 294 [2022-07-12 10:37:37,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 275 transitions, 750 flow. Second operand has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:37,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:37,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 294 [2022-07-12 10:37:37,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:38,068 INFO L129 PetriNetUnfolder]: 2356/4704 cut-off events. [2022-07-12 10:37:38,068 INFO L130 PetriNetUnfolder]: For 4611/5423 co-relation queries the response was YES. [2022-07-12 10:37:38,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11437 conditions, 4704 events. 2356/4704 cut-off events. For 4611/5423 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 33564 event pairs, 867 based on Foata normal form. 805/5322 useless extension candidates. Maximal degree in co-relation 11419. Up to 1704 conditions per place. [2022-07-12 10:37:38,098 INFO L132 encePairwiseOnDemand]: 283/294 looper letters, 144 selfloop transitions, 14 changer transitions 10/348 dead transitions. [2022-07-12 10:37:38,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 348 transitions, 1387 flow [2022-07-12 10:37:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:37:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:37:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1827 transitions. [2022-07-12 10:37:38,102 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2022-07-12 10:37:38,102 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1827 transitions. [2022-07-12 10:37:38,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1827 transitions. [2022-07-12 10:37:38,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:38,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1827 transitions. [2022-07-12 10:37:38,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.0) internal successors, (1827), 9 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:38,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:38,109 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:38,109 INFO L186 Difference]: Start difference. First operand has 280 places, 275 transitions, 750 flow. Second operand 9 states and 1827 transitions. [2022-07-12 10:37:38,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 348 transitions, 1387 flow [2022-07-12 10:37:38,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 348 transitions, 1353 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-07-12 10:37:38,121 INFO L242 Difference]: Finished difference. Result has 286 places, 281 transitions, 837 flow [2022-07-12 10:37:38,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=837, PETRI_PLACES=286, PETRI_TRANSITIONS=281} [2022-07-12 10:37:38,122 INFO L279 CegarLoopForPetriNet]: 265 programPoint places, 21 predicate places. [2022-07-12 10:37:38,122 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 281 transitions, 837 flow [2022-07-12 10:37:38,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:38,123 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:38,123 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:38,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:38,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:38,336 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 1 more)] === [2022-07-12 10:37:38,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:38,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1512803545, now seen corresponding path program 4 times [2022-07-12 10:37:38,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:38,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436477773] [2022-07-12 10:37:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:38,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:38,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:38,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436477773] [2022-07-12 10:37:38,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436477773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:38,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918620753] [2022-07-12 10:37:38,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:37:38,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:38,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:38,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:37:38,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:37:38,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:37:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:38,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:37:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:39,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918620753] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:39,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:37:39,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 19 [2022-07-12 10:37:39,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450716824] [2022-07-12 10:37:39,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:39,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:37:39,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:39,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:37:39,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:37:39,032 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 294 [2022-07-12 10:37:39,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 281 transitions, 837 flow. Second operand has 9 states, 9 states have (on average 204.33333333333334) internal successors, (1839), 9 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:39,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:39,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 294 [2022-07-12 10:37:39,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:39,734 INFO L129 PetriNetUnfolder]: 2667/5224 cut-off events. [2022-07-12 10:37:39,734 INFO L130 PetriNetUnfolder]: For 7304/8271 co-relation queries the response was YES. [2022-07-12 10:37:39,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13525 conditions, 5224 events. 2667/5224 cut-off events. For 7304/8271 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 38202 event pairs, 289 based on Foata normal form. 964/6058 useless extension candidates. Maximal degree in co-relation 13504. Up to 1304 conditions per place. [2022-07-12 10:37:39,765 INFO L132 encePairwiseOnDemand]: 281/294 looper letters, 144 selfloop transitions, 37 changer transitions 0/354 dead transitions. [2022-07-12 10:37:39,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 354 transitions, 1490 flow [2022-07-12 10:37:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:37:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:37:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2320 transitions. [2022-07-12 10:37:39,770 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.717377860235003 [2022-07-12 10:37:39,770 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2320 transitions. [2022-07-12 10:37:39,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2320 transitions. [2022-07-12 10:37:39,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:39,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2320 transitions. [2022-07-12 10:37:39,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 210.9090909090909) internal successors, (2320), 11 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:39,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:39,788 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:39,788 INFO L186 Difference]: Start difference. First operand has 286 places, 281 transitions, 837 flow. Second operand 11 states and 2320 transitions. [2022-07-12 10:37:39,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 354 transitions, 1490 flow [2022-07-12 10:37:39,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 354 transitions, 1456 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-07-12 10:37:39,807 INFO L242 Difference]: Finished difference. Result has 293 places, 293 transitions, 1036 flow [2022-07-12 10:37:39,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1036, PETRI_PLACES=293, PETRI_TRANSITIONS=293} [2022-07-12 10:37:39,808 INFO L279 CegarLoopForPetriNet]: 265 programPoint places, 28 predicate places. [2022-07-12 10:37:39,809 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 293 transitions, 1036 flow [2022-07-12 10:37:39,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 204.33333333333334) internal successors, (1839), 9 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:39,809 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:39,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:39,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:40,023 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 1 more)] === [2022-07-12 10:37:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:40,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1928463291, now seen corresponding path program 5 times [2022-07-12 10:37:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:40,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843689752] [2022-07-12 10:37:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:40,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:40,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843689752] [2022-07-12 10:37:40,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843689752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856894411] [2022-07-12 10:37:40,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:37:40,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:40,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:40,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:37:40,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:37:40,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:40,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:37:40,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:40,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:37:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:40,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856894411] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:37:40,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:37:40,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2022-07-12 10:37:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756599542] [2022-07-12 10:37:40,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:37:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:37:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:40,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:37:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:37:40,349 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 294 [2022-07-12 10:37:40,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 293 transitions, 1036 flow. Second operand has 16 states, 16 states have (on average 199.3125) internal successors, (3189), 16 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:40,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:40,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 294 [2022-07-12 10:37:40,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:43,407 INFO L129 PetriNetUnfolder]: 10255/19226 cut-off events. [2022-07-12 10:37:43,408 INFO L130 PetriNetUnfolder]: For 37091/37398 co-relation queries the response was YES. [2022-07-12 10:37:43,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55648 conditions, 19226 events. 10255/19226 cut-off events. For 37091/37398 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 158379 event pairs, 797 based on Foata normal form. 20/19165 useless extension candidates. Maximal degree in co-relation 55625. Up to 1909 conditions per place. [2022-07-12 10:37:43,595 INFO L132 encePairwiseOnDemand]: 265/294 looper letters, 334 selfloop transitions, 134 changer transitions 0/635 dead transitions. [2022-07-12 10:37:43,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 635 transitions, 3612 flow [2022-07-12 10:37:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 10:37:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-12 10:37:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 5177 transitions. [2022-07-12 10:37:43,604 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7043537414965987 [2022-07-12 10:37:43,604 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 5177 transitions. [2022-07-12 10:37:43,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 5177 transitions. [2022-07-12 10:37:43,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:43,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 5177 transitions. [2022-07-12 10:37:43,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 207.08) internal successors, (5177), 25 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:43,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 294.0) internal successors, (7644), 26 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:43,621 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 294.0) internal successors, (7644), 26 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:43,621 INFO L186 Difference]: Start difference. First operand has 293 places, 293 transitions, 1036 flow. Second operand 25 states and 5177 transitions. [2022-07-12 10:37:43,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 635 transitions, 3612 flow [2022-07-12 10:37:43,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 635 transitions, 3516 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-07-12 10:37:43,847 INFO L242 Difference]: Finished difference. Result has 327 places, 382 transitions, 2264 flow [2022-07-12 10:37:43,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2264, PETRI_PLACES=327, PETRI_TRANSITIONS=382} [2022-07-12 10:37:43,848 INFO L279 CegarLoopForPetriNet]: 265 programPoint places, 62 predicate places. [2022-07-12 10:37:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 382 transitions, 2264 flow [2022-07-12 10:37:43,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 199.3125) internal successors, (3189), 16 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:43,849 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:43,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:43,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:44,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:44,068 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 1 more)] === [2022-07-12 10:37:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash 500284819, now seen corresponding path program 6 times [2022-07-12 10:37:44,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:44,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110471406] [2022-07-12 10:37:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:44,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:37:44,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110471406] [2022-07-12 10:37:44,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110471406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254456092] [2022-07-12 10:37:44,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:37:44,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:44,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:44,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:44,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:37:44,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-12 10:37:44,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:37:44,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:37:44,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:37:44,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254456092] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:44,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:37:44,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-07-12 10:37:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697770607] [2022-07-12 10:37:44,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:44,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:37:44,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:37:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:37:44,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 294 [2022-07-12 10:37:44,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 382 transitions, 2264 flow. Second operand has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:44,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:44,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 294 [2022-07-12 10:37:44,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:45,783 INFO L129 PetriNetUnfolder]: 4049/8699 cut-off events. [2022-07-12 10:37:45,784 INFO L130 PetriNetUnfolder]: For 35766/36853 co-relation queries the response was YES. [2022-07-12 10:37:45,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29073 conditions, 8699 events. 4049/8699 cut-off events. For 35766/36853 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 71200 event pairs, 1378 based on Foata normal form. 82/8576 useless extension candidates. Maximal degree in co-relation 29034. Up to 3038 conditions per place. [2022-07-12 10:37:45,858 INFO L132 encePairwiseOnDemand]: 283/294 looper letters, 200 selfloop transitions, 39 changer transitions 7/443 dead transitions. [2022-07-12 10:37:45,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 443 transitions, 3025 flow [2022-07-12 10:37:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:37:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:37:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1833 transitions. [2022-07-12 10:37:45,861 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6927437641723356 [2022-07-12 10:37:45,861 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1833 transitions. [2022-07-12 10:37:45,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1833 transitions. [2022-07-12 10:37:45,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:45,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1833 transitions. [2022-07-12 10:37:45,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.66666666666666) internal successors, (1833), 9 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:45,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:45,867 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:45,867 INFO L186 Difference]: Start difference. First operand has 327 places, 382 transitions, 2264 flow. Second operand 9 states and 1833 transitions. [2022-07-12 10:37:45,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 443 transitions, 3025 flow [2022-07-12 10:37:45,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 443 transitions, 2964 flow, removed 20 selfloop flow, removed 6 redundant places. [2022-07-12 10:37:45,952 INFO L242 Difference]: Finished difference. Result has 334 places, 387 transitions, 2391 flow [2022-07-12 10:37:45,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2391, PETRI_PLACES=334, PETRI_TRANSITIONS=387} [2022-07-12 10:37:45,953 INFO L279 CegarLoopForPetriNet]: 265 programPoint places, 69 predicate places. [2022-07-12 10:37:45,954 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 387 transitions, 2391 flow [2022-07-12 10:37:45,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:45,954 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:45,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:45,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:37:46,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:46,171 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 1 more)] === [2022-07-12 10:37:46,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:46,171 INFO L85 PathProgramCache]: Analyzing trace with hash -879009436, now seen corresponding path program 1 times [2022-07-12 10:37:46,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:46,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074359026] [2022-07-12 10:37:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:46,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:37:48,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:48,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074359026] [2022-07-12 10:37:48,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074359026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:48,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063733180] [2022-07-12 10:37:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:48,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:48,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:48,038 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:48,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:37:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 124 conjunts are in the unsatisfiable core [2022-07-12 10:37:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:48,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:37:49,332 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 10:37:49,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 10:37:49,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 10:37:50,094 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-12 10:37:50,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-07-12 10:37:50,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:37:51,086 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-12 10:37:51,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2022-07-12 10:37:51,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:37:51,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:37:52,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:37:52,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:37:52,843 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 10:37:52,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2022-07-12 10:37:53,428 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 10:37:53,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-07-12 10:37:54,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:37:54,580 INFO L356 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2022-07-12 10:37:54,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 32 [2022-07-12 10:37:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:37:54,652 INFO L328 TraceCheckSpWp]: Computing backward predicates...