./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-array-int-symm.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/chl-array-int-symm.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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:21:30,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:21:30,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:21:30,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:21:30,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:21:30,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:21:30,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:21:30,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:21:30,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:21:30,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:21:30,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:21:30,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:21:30,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:21:30,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:21:30,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:21:30,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:21:30,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:21:30,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:21:30,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:21:30,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:21:30,465 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:21:30,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:21:30,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:21:30,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:21:30,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:21:30,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:21:30,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:21:30,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:21:30,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:21:30,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:21:30,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:21:30,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:21:30,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:21:30,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:21:30,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:21:30,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:21:30,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:21:30,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:21:30,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:21:30,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:21:30,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:21:30,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:21:30,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:21:30,492 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:21:30,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:21:30,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:21:30,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:21:30,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:21:30,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:21:30,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:21:30,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:21:30,494 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:21:30,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:21:30,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:21:30,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:21:30,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:21:30,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:21:30,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:21:30,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:21:30,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:21:30,496 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:21:30,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:21:30,496 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:21:30,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:21:30,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:21:30,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:21:30,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:21:30,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:21:30,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:21:30,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:21:30,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:21:30,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:21:30,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:21:30,498 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:21:30,498 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:21:30,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:21:30,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2022-07-12 10:21:30,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:21:30,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:21:30,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:21:30,657 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:21:30,657 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:21:30,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-07-12 10:21:30,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65372fb88/5d4a63a48b61412197b2f7c6c0c31f20/FLAG88c6b193e [2022-07-12 10:21:31,075 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:21:31,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-07-12 10:21:31,080 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65372fb88/5d4a63a48b61412197b2f7c6c0c31f20/FLAG88c6b193e [2022-07-12 10:21:31,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65372fb88/5d4a63a48b61412197b2f7c6c0c31f20 [2022-07-12 10:21:31,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:21:31,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:21:31,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:21:31,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:21:31,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:21:31,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25edd30c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31, skipping insertion in model container [2022-07-12 10:21:31,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:21:31,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:21:31,291 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/chl-array-int-symm.wvr.c[2482,2495] [2022-07-12 10:21:31,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:21:31,314 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:21:31,341 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/chl-array-int-symm.wvr.c[2482,2495] [2022-07-12 10:21:31,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:21:31,358 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:21:31,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31 WrapperNode [2022-07-12 10:21:31,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:21:31,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:21:31,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:21:31,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:21:31,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,403 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 198 [2022-07-12 10:21:31,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:21:31,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:21:31,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:21:31,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:21:31,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:21:31,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:21:31,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:21:31,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:21:31,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (1/1) ... [2022-07-12 10:21:31,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:21:31,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:31,483 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 10:21:31,489 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 10:21:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:21:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:21:31,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:21:31,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:21:31,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:21:31,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:21:31,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:21:31,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:21:31,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:21:31,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:21:31,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:21:31,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:21:31,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:21:31,513 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 10:21:31,584 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:21:31,585 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:21:31,879 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:21:31,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:21:31,889 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 10:21:31,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:21:31 BoogieIcfgContainer [2022-07-12 10:21:31,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:21:31,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:21:31,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:21:31,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:21:31,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:21:31" (1/3) ... [2022-07-12 10:21:31,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfad3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:21:31, skipping insertion in model container [2022-07-12 10:21:31,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:21:31" (2/3) ... [2022-07-12 10:21:31,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfad3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:21:31, skipping insertion in model container [2022-07-12 10:21:31,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:21:31" (3/3) ... [2022-07-12 10:21:31,914 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2022-07-12 10:21:31,918 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:21:31,924 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:21:31,924 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:21:31,925 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:21:31,978 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:21:32,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 244 places, 258 transitions, 532 flow [2022-07-12 10:21:32,062 INFO L129 PetriNetUnfolder]: 21/256 cut-off events. [2022-07-12 10:21:32,063 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:21:32,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 256 events. 21/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 347 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2022-07-12 10:21:32,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 258 transitions, 532 flow [2022-07-12 10:21:32,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 247 transitions, 506 flow [2022-07-12 10:21:32,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:21:32,083 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@3d621706, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@404728fb [2022-07-12 10:21:32,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:21:32,124 INFO L129 PetriNetUnfolder]: 21/246 cut-off events. [2022-07-12 10:21:32,124 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:21:32,124 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:32,125 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] [2022-07-12 10:21:32,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash 727559992, now seen corresponding path program 1 times [2022-07-12 10:21:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:32,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539228284] [2022-07-12 10:21:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:32,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:32,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:32,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539228284] [2022-07-12 10:21:32,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539228284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:32,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:32,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:21:32,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974019260] [2022-07-12 10:21:32,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:32,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:21:32,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:21:32,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:21:32,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 258 [2022-07-12 10:21:32,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 247 transitions, 506 flow. Second operand has 2 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 10:21:32,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:32,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 258 [2022-07-12 10:21:32,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:32,483 INFO L129 PetriNetUnfolder]: 6/232 cut-off events. [2022-07-12 10:21:32,488 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:21:32,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 232 events. 6/232 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 17/232 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2022-07-12 10:21:32,492 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 4 selfloop transitions, 0 changer transitions 7/232 dead transitions. [2022-07-12 10:21:32,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 232 transitions, 484 flow [2022-07-12 10:21:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:21:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:21:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 495 transitions. [2022-07-12 10:21:32,511 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9593023255813954 [2022-07-12 10:21:32,512 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 495 transitions. [2022-07-12 10:21:32,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 495 transitions. [2022-07-12 10:21:32,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:32,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 495 transitions. [2022-07-12 10:21:32,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 10:21:32,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 10:21:32,529 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 10:21:32,530 INFO L186 Difference]: Start difference. First operand has 233 places, 247 transitions, 506 flow. Second operand 2 states and 495 transitions. [2022-07-12 10:21:32,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 232 transitions, 484 flow [2022-07-12 10:21:32,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 232 transitions, 476 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:21:32,539 INFO L242 Difference]: Finished difference. Result has 230 places, 225 transitions, 454 flow [2022-07-12 10:21:32,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=454, PETRI_PLACES=230, PETRI_TRANSITIONS=225} [2022-07-12 10:21:32,543 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, -3 predicate places. [2022-07-12 10:21:32,543 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 225 transitions, 454 flow [2022-07-12 10:21:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 10:21:32,545 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:32,545 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] [2022-07-12 10:21:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:21:32,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash -38155261, now seen corresponding path program 1 times [2022-07-12 10:21:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:32,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827306022] [2022-07-12 10:21:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:32,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:33,098 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 10:21:33,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:33,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827306022] [2022-07-12 10:21:33,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827306022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:33,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:33,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:21:33,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611354970] [2022-07-12 10:21:33,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:33,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:21:33,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:21:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:21:33,104 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-12 10:21:33,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 225 transitions, 454 flow. Second operand has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states 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 10:21:33,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:33,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-12 10:21:33,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:34,155 INFO L129 PetriNetUnfolder]: 144/1812 cut-off events. [2022-07-12 10:21:34,155 INFO L130 PetriNetUnfolder]: For 28/34 co-relation queries the response was YES. [2022-07-12 10:21:34,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2177 conditions, 1812 events. 144/1812 cut-off events. For 28/34 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 13685 event pairs, 57 based on Foata normal form. 1/1645 useless extension candidates. Maximal degree in co-relation 2174. Up to 94 conditions per place. [2022-07-12 10:21:34,162 INFO L132 encePairwiseOnDemand]: 231/258 looper letters, 141 selfloop transitions, 27 changer transitions 12/339 dead transitions. [2022-07-12 10:21:34,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 339 transitions, 1055 flow [2022-07-12 10:21:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 10:21:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-12 10:21:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4237 transitions. [2022-07-12 10:21:34,171 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6842700258397932 [2022-07-12 10:21:34,171 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4237 transitions. [2022-07-12 10:21:34,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4237 transitions. [2022-07-12 10:21:34,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:34,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4237 transitions. [2022-07-12 10:21:34,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 176.54166666666666) internal successors, (4237), 24 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states 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 10:21:34,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states 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 10:21:34,193 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states 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 10:21:34,193 INFO L186 Difference]: Start difference. First operand has 230 places, 225 transitions, 454 flow. Second operand 24 states and 4237 transitions. [2022-07-12 10:21:34,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 339 transitions, 1055 flow [2022-07-12 10:21:34,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 339 transitions, 1055 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:21:34,199 INFO L242 Difference]: Finished difference. Result has 258 places, 241 transitions, 602 flow [2022-07-12 10:21:34,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=602, PETRI_PLACES=258, PETRI_TRANSITIONS=241} [2022-07-12 10:21:34,200 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 25 predicate places. [2022-07-12 10:21:34,200 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 241 transitions, 602 flow [2022-07-12 10:21:34,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states 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 10:21:34,202 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:34,202 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] [2022-07-12 10:21:34,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:21:34,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash -411240785, now seen corresponding path program 2 times [2022-07-12 10:21:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:34,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584708746] [2022-07-12 10:21:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:34,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:34,537 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 10:21:34,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584708746] [2022-07-12 10:21:34,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584708746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:34,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:34,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:21:34,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17894899] [2022-07-12 10:21:34,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:34,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:21:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:34,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:21:34,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:21:34,541 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-12 10:21:34,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 241 transitions, 602 flow. Second operand has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states 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 10:21:34,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:34,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-12 10:21:34,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:35,453 INFO L129 PetriNetUnfolder]: 140/1844 cut-off events. [2022-07-12 10:21:35,453 INFO L130 PetriNetUnfolder]: For 204/212 co-relation queries the response was YES. [2022-07-12 10:21:35,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2419 conditions, 1844 events. 140/1844 cut-off events. For 204/212 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 13769 event pairs, 54 based on Foata normal form. 5/1688 useless extension candidates. Maximal degree in co-relation 2403. Up to 94 conditions per place. [2022-07-12 10:21:35,461 INFO L132 encePairwiseOnDemand]: 231/258 looper letters, 140 selfloop transitions, 29 changer transitions 12/340 dead transitions. [2022-07-12 10:21:35,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 340 transitions, 1224 flow [2022-07-12 10:21:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 10:21:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-12 10:21:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4236 transitions. [2022-07-12 10:21:35,468 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6841085271317829 [2022-07-12 10:21:35,468 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4236 transitions. [2022-07-12 10:21:35,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4236 transitions. [2022-07-12 10:21:35,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:35,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4236 transitions. [2022-07-12 10:21:35,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 176.5) internal successors, (4236), 24 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states 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 10:21:35,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states 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 10:21:35,484 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states 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 10:21:35,484 INFO L186 Difference]: Start difference. First operand has 258 places, 241 transitions, 602 flow. Second operand 24 states and 4236 transitions. [2022-07-12 10:21:35,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 340 transitions, 1224 flow [2022-07-12 10:21:35,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 340 transitions, 1190 flow, removed 9 selfloop flow, removed 9 redundant places. [2022-07-12 10:21:35,491 INFO L242 Difference]: Finished difference. Result has 275 places, 246 transitions, 695 flow [2022-07-12 10:21:35,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=695, PETRI_PLACES=275, PETRI_TRANSITIONS=246} [2022-07-12 10:21:35,492 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 42 predicate places. [2022-07-12 10:21:35,492 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 246 transitions, 695 flow [2022-07-12 10:21:35,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states 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 10:21:35,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:35,494 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] [2022-07-12 10:21:35,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:21:35,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:35,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1619395327, now seen corresponding path program 1 times [2022-07-12 10:21:35,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:35,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111310893] [2022-07-12 10:21:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:35,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:35,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:35,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111310893] [2022-07-12 10:21:35,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111310893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041803654] [2022-07-12 10:21:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:35,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:35,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:35,650 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 10:21:35,678 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 10:21:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:35,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:21:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:36,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:21:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:36,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041803654] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:36,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:21:36,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-12 10:21:36,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414420425] [2022-07-12 10:21:36,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:36,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:21:36,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:21:36,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:21:36,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-12 10:21:36,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 246 transitions, 695 flow. Second operand has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 10:21:36,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:36,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-12 10:21:36,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:36,943 INFO L129 PetriNetUnfolder]: 191/2490 cut-off events. [2022-07-12 10:21:36,944 INFO L130 PetriNetUnfolder]: For 617/639 co-relation queries the response was YES. [2022-07-12 10:21:36,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3372 conditions, 2490 events. 191/2490 cut-off events. For 617/639 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 20934 event pairs, 83 based on Foata normal form. 3/2268 useless extension candidates. Maximal degree in co-relation 3353. Up to 223 conditions per place. [2022-07-12 10:21:36,959 INFO L132 encePairwiseOnDemand]: 239/258 looper letters, 149 selfloop transitions, 25 changer transitions 8/341 dead transitions. [2022-07-12 10:21:36,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 341 transitions, 1339 flow [2022-07-12 10:21:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:21:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:21:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3212 transitions. [2022-07-12 10:21:36,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6916451335055986 [2022-07-12 10:21:36,965 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3212 transitions. [2022-07-12 10:21:36,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3212 transitions. [2022-07-12 10:21:36,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:36,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3212 transitions. [2022-07-12 10:21:36,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 178.44444444444446) internal successors, (3212), 18 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states 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 10:21:36,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states 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 10:21:36,983 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states 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 10:21:36,983 INFO L186 Difference]: Start difference. First operand has 275 places, 246 transitions, 695 flow. Second operand 18 states and 3212 transitions. [2022-07-12 10:21:36,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 341 transitions, 1339 flow [2022-07-12 10:21:36,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 341 transitions, 1278 flow, removed 9 selfloop flow, removed 20 redundant places. [2022-07-12 10:21:36,993 INFO L242 Difference]: Finished difference. Result has 275 places, 257 transitions, 777 flow [2022-07-12 10:21:36,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=777, PETRI_PLACES=275, PETRI_TRANSITIONS=257} [2022-07-12 10:21:36,994 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 42 predicate places. [2022-07-12 10:21:36,995 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 257 transitions, 777 flow [2022-07-12 10:21:36,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 10:21:36,996 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:36,996 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] [2022-07-12 10:21:37,016 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 10:21:37,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:37,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:37,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1111966459, now seen corresponding path program 2 times [2022-07-12 10:21:37,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:37,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176736303] [2022-07-12 10:21:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:37,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:37,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176736303] [2022-07-12 10:21:37,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176736303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183178308] [2022-07-12 10:21:37,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:21:37,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:37,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:37,440 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 10:21:37,441 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 10:21:37,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:21:37,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:21:37,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:21:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:21:37,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:21:37,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183178308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:37,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:21:37,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2022-07-12 10:21:37,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996247694] [2022-07-12 10:21:37,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:37,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:21:37,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:21:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-07-12 10:21:37,770 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 258 [2022-07-12 10:21:37,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 257 transitions, 777 flow. Second operand has 12 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 10:21:37,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:37,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 258 [2022-07-12 10:21:37,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:38,397 INFO L129 PetriNetUnfolder]: 221/3054 cut-off events. [2022-07-12 10:21:38,397 INFO L130 PetriNetUnfolder]: For 1334/1384 co-relation queries the response was YES. [2022-07-12 10:21:38,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 3054 events. 221/3054 cut-off events. For 1334/1384 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 26652 event pairs, 30 based on Foata normal form. 15/2795 useless extension candidates. Maximal degree in co-relation 4262. Up to 234 conditions per place. [2022-07-12 10:21:38,412 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 79 selfloop transitions, 16 changer transitions 12/297 dead transitions. [2022-07-12 10:21:38,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 297 transitions, 1146 flow [2022-07-12 10:21:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:21:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:21:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2705 transitions. [2022-07-12 10:21:38,417 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7488925802879292 [2022-07-12 10:21:38,417 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2705 transitions. [2022-07-12 10:21:38,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2705 transitions. [2022-07-12 10:21:38,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:38,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2705 transitions. [2022-07-12 10:21:38,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.21428571428572) internal successors, (2705), 14 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states 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 10:21:38,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states 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 10:21:38,432 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states 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 10:21:38,433 INFO L186 Difference]: Start difference. First operand has 275 places, 257 transitions, 777 flow. Second operand 14 states and 2705 transitions. [2022-07-12 10:21:38,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 297 transitions, 1146 flow [2022-07-12 10:21:38,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 297 transitions, 1085 flow, removed 21 selfloop flow, removed 9 redundant places. [2022-07-12 10:21:38,444 INFO L242 Difference]: Finished difference. Result has 289 places, 262 transitions, 858 flow [2022-07-12 10:21:38,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=858, PETRI_PLACES=289, PETRI_TRANSITIONS=262} [2022-07-12 10:21:38,446 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 56 predicate places. [2022-07-12 10:21:38,446 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 262 transitions, 858 flow [2022-07-12 10:21:38,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 10:21:38,447 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:38,447 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] [2022-07-12 10:21:38,481 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 10:21:38,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:38,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:38,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1904163694, now seen corresponding path program 1 times [2022-07-12 10:21:38,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:38,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275265786] [2022-07-12 10:21:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:38,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:38,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275265786] [2022-07-12 10:21:38,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275265786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:38,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396064667] [2022-07-12 10:21:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:38,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:38,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:38,850 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 10:21:38,852 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 10:21:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:38,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:21:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:39,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:21:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:39,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396064667] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:39,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:21:39,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-12 10:21:39,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414347595] [2022-07-12 10:21:39,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:39,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:21:39,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:21:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:21:39,466 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-12 10:21:39,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 262 transitions, 858 flow. Second operand has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 10:21:39,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:39,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-12 10:21:39,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:40,132 INFO L129 PetriNetUnfolder]: 223/3065 cut-off events. [2022-07-12 10:21:40,132 INFO L130 PetriNetUnfolder]: For 2066/2136 co-relation queries the response was YES. [2022-07-12 10:21:40,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4552 conditions, 3065 events. 223/3065 cut-off events. For 2066/2136 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 26652 event pairs, 91 based on Foata normal form. 7/2789 useless extension candidates. Maximal degree in co-relation 4521. Up to 258 conditions per place. [2022-07-12 10:21:40,153 INFO L132 encePairwiseOnDemand]: 236/258 looper letters, 154 selfloop transitions, 29 changer transitions 4/346 dead transitions. [2022-07-12 10:21:40,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 346 transitions, 1599 flow [2022-07-12 10:21:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 10:21:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-12 10:21:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3546 transitions. [2022-07-12 10:21:40,161 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6872093023255814 [2022-07-12 10:21:40,161 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3546 transitions. [2022-07-12 10:21:40,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3546 transitions. [2022-07-12 10:21:40,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:40,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3546 transitions. [2022-07-12 10:21:40,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 177.3) internal successors, (3546), 20 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states 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 10:21:40,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states 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 10:21:40,175 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states 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 10:21:40,175 INFO L186 Difference]: Start difference. First operand has 289 places, 262 transitions, 858 flow. Second operand 20 states and 3546 transitions. [2022-07-12 10:21:40,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 346 transitions, 1599 flow [2022-07-12 10:21:40,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 346 transitions, 1476 flow, removed 54 selfloop flow, removed 11 redundant places. [2022-07-12 10:21:40,186 INFO L242 Difference]: Finished difference. Result has 293 places, 270 transitions, 995 flow [2022-07-12 10:21:40,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=995, PETRI_PLACES=293, PETRI_TRANSITIONS=270} [2022-07-12 10:21:40,188 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 60 predicate places. [2022-07-12 10:21:40,188 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 270 transitions, 995 flow [2022-07-12 10:21:40,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 10:21:40,189 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:40,189 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] [2022-07-12 10:21:40,208 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 10:21:40,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:40,406 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1602370668, now seen corresponding path program 1 times [2022-07-12 10:21:40,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:40,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239160309] [2022-07-12 10:21:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:40,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:40,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239160309] [2022-07-12 10:21:40,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239160309] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461585684] [2022-07-12 10:21:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:40,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:40,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:40,560 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 10:21:40,575 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 10:21:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:21:40,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:40,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:21:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:41,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461585684] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:41,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:21:41,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-12 10:21:41,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792487630] [2022-07-12 10:21:41,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:41,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:21:41,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:41,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:21:41,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:21:41,069 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 258 [2022-07-12 10:21:41,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 270 transitions, 995 flow. Second operand has 11 states, 11 states have (on average 200.36363636363637) internal successors, (2204), 11 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states 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 10:21:41,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:41,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 258 [2022-07-12 10:21:41,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:41,689 INFO L129 PetriNetUnfolder]: 402/3869 cut-off events. [2022-07-12 10:21:41,689 INFO L130 PetriNetUnfolder]: For 2031/2039 co-relation queries the response was YES. [2022-07-12 10:21:41,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5664 conditions, 3869 events. 402/3869 cut-off events. For 2031/2039 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 36099 event pairs, 135 based on Foata normal form. 3/3514 useless extension candidates. Maximal degree in co-relation 5637. Up to 234 conditions per place. [2022-07-12 10:21:41,710 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 106 selfloop transitions, 22 changer transitions 0/326 dead transitions. [2022-07-12 10:21:41,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 326 transitions, 1451 flow [2022-07-12 10:21:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:21:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:21:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3658 transitions. [2022-07-12 10:21:41,715 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7876830318690784 [2022-07-12 10:21:41,715 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3658 transitions. [2022-07-12 10:21:41,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3658 transitions. [2022-07-12 10:21:41,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:41,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3658 transitions. [2022-07-12 10:21:41,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 203.22222222222223) internal successors, (3658), 18 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states 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 10:21:41,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states 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 10:21:41,725 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states 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 10:21:41,725 INFO L186 Difference]: Start difference. First operand has 293 places, 270 transitions, 995 flow. Second operand 18 states and 3658 transitions. [2022-07-12 10:21:41,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 326 transitions, 1451 flow [2022-07-12 10:21:41,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 326 transitions, 1386 flow, removed 24 selfloop flow, removed 9 redundant places. [2022-07-12 10:21:41,734 INFO L242 Difference]: Finished difference. Result has 301 places, 276 transitions, 1003 flow [2022-07-12 10:21:41,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1003, PETRI_PLACES=301, PETRI_TRANSITIONS=276} [2022-07-12 10:21:41,735 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 68 predicate places. [2022-07-12 10:21:41,735 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 276 transitions, 1003 flow [2022-07-12 10:21:41,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.36363636363637) internal successors, (2204), 11 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states 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 10:21:41,735 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:41,736 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] [2022-07-12 10:21:41,758 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 10:21:41,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:41,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1108619878, now seen corresponding path program 1 times [2022-07-12 10:21:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:41,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872963407] [2022-07-12 10:21:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:21:42,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:42,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872963407] [2022-07-12 10:21:42,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872963407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:42,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223390169] [2022-07-12 10:21:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:42,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:42,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:42,136 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 10:21:42,138 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 10:21:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:42,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:21:42,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:21:42,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:21:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:21:42,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223390169] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:42,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:21:42,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-12 10:21:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257784035] [2022-07-12 10:21:42,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:42,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:21:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:21:42,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:21:42,627 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 258 [2022-07-12 10:21:42,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 276 transitions, 1003 flow. Second operand has 11 states, 11 states have (on average 200.45454545454547) internal successors, (2205), 11 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states 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 10:21:42,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:42,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 258 [2022-07-12 10:21:42,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:43,293 INFO L129 PetriNetUnfolder]: 376/4097 cut-off events. [2022-07-12 10:21:43,293 INFO L130 PetriNetUnfolder]: For 2162/2170 co-relation queries the response was YES. [2022-07-12 10:21:43,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6114 conditions, 4097 events. 376/4097 cut-off events. For 2162/2170 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 39381 event pairs, 123 based on Foata normal form. 6/3817 useless extension candidates. Maximal degree in co-relation 6086. Up to 202 conditions per place. [2022-07-12 10:21:43,355 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 112 selfloop transitions, 22 changer transitions 0/335 dead transitions. [2022-07-12 10:21:43,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 335 transitions, 1518 flow [2022-07-12 10:21:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:21:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:21:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3661 transitions. [2022-07-12 10:21:43,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7883290267011197 [2022-07-12 10:21:43,369 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3661 transitions. [2022-07-12 10:21:43,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3661 transitions. [2022-07-12 10:21:43,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:43,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3661 transitions. [2022-07-12 10:21:43,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 203.38888888888889) internal successors, (3661), 18 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states 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 10:21:43,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states 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 10:21:43,384 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states 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 10:21:43,384 INFO L186 Difference]: Start difference. First operand has 301 places, 276 transitions, 1003 flow. Second operand 18 states and 3661 transitions. [2022-07-12 10:21:43,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 335 transitions, 1518 flow [2022-07-12 10:21:43,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 335 transitions, 1493 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-12 10:21:43,393 INFO L242 Difference]: Finished difference. Result has 310 places, 282 transitions, 1047 flow [2022-07-12 10:21:43,394 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1047, PETRI_PLACES=310, PETRI_TRANSITIONS=282} [2022-07-12 10:21:43,395 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 77 predicate places. [2022-07-12 10:21:43,396 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 282 transitions, 1047 flow [2022-07-12 10:21:43,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.45454545454547) internal successors, (2205), 11 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states 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 10:21:43,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:43,396 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] [2022-07-12 10:21:43,414 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 10:21:43,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:43,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2275650, now seen corresponding path program 1 times [2022-07-12 10:21:43,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:43,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851752340] [2022-07-12 10:21:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:43,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:43,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:43,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851752340] [2022-07-12 10:21:43,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851752340] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:43,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765709094] [2022-07-12 10:21:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:43,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:43,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:43,946 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 10:21:43,959 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 10:21:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:44,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 10:21:44,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:44,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:21:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:45,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765709094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:21:45,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:21:45,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 43 [2022-07-12 10:21:45,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081616970] [2022-07-12 10:21:45,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:21:45,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 10:21:45,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:45,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 10:21:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 10:21:45,511 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 258 [2022-07-12 10:21:45,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 282 transitions, 1047 flow. Second operand has 43 states, 43 states have (on average 170.09302325581396) internal successors, (7314), 43 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states 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 10:21:45,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:45,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 258 [2022-07-12 10:21:45,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:47,551 INFO L129 PetriNetUnfolder]: 396/5497 cut-off events. [2022-07-12 10:21:47,552 INFO L130 PetriNetUnfolder]: For 3865/3969 co-relation queries the response was YES. [2022-07-12 10:21:47,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8530 conditions, 5497 events. 396/5497 cut-off events. For 3865/3969 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 55710 event pairs, 176 based on Foata normal form. 16/5147 useless extension candidates. Maximal degree in co-relation 8500. Up to 580 conditions per place. [2022-07-12 10:21:47,579 INFO L132 encePairwiseOnDemand]: 234/258 looper letters, 223 selfloop transitions, 49 changer transitions 12/447 dead transitions. [2022-07-12 10:21:47,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 447 transitions, 2392 flow [2022-07-12 10:21:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 10:21:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 10:21:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5732 transitions. [2022-07-12 10:21:47,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6732440685929058 [2022-07-12 10:21:47,584 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5732 transitions. [2022-07-12 10:21:47,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5732 transitions. [2022-07-12 10:21:47,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:47,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5732 transitions. [2022-07-12 10:21:47,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 173.6969696969697) internal successors, (5732), 33 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states 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 10:21:47,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 258.0) internal successors, (8772), 34 states have internal predecessors, (8772), 0 states have call successors, (0), 0 states 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 10:21:47,597 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 258.0) internal successors, (8772), 34 states have internal predecessors, (8772), 0 states have call successors, (0), 0 states 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 10:21:47,597 INFO L186 Difference]: Start difference. First operand has 310 places, 282 transitions, 1047 flow. Second operand 33 states and 5732 transitions. [2022-07-12 10:21:47,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 447 transitions, 2392 flow [2022-07-12 10:21:47,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 447 transitions, 2358 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-07-12 10:21:47,609 INFO L242 Difference]: Finished difference. Result has 343 places, 309 transitions, 1399 flow [2022-07-12 10:21:47,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1399, PETRI_PLACES=343, PETRI_TRANSITIONS=309} [2022-07-12 10:21:47,610 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 110 predicate places. [2022-07-12 10:21:47,610 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 309 transitions, 1399 flow [2022-07-12 10:21:47,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 170.09302325581396) internal successors, (7314), 43 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states 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 10:21:47,612 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:47,612 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] [2022-07-12 10:21:47,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 10:21:47,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:47,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash 685094907, now seen corresponding path program 1 times [2022-07-12 10:21:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:47,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498051799] [2022-07-12 10:21:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:47,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:47,881 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 10:21:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498051799] [2022-07-12 10:21:47,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498051799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:47,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:47,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:21:47,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146171089] [2022-07-12 10:21:47,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:47,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:21:47,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:21:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:21:47,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-12 10:21:47,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 309 transitions, 1399 flow. Second operand has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states 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 10:21:47,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:47,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-12 10:21:47,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:48,678 INFO L129 PetriNetUnfolder]: 582/6515 cut-off events. [2022-07-12 10:21:48,678 INFO L130 PetriNetUnfolder]: For 5388/5422 co-relation queries the response was YES. [2022-07-12 10:21:48,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10345 conditions, 6515 events. 582/6515 cut-off events. For 5388/5422 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 69725 event pairs, 341 based on Foata normal form. 32/6127 useless extension candidates. Maximal degree in co-relation 10304. Up to 986 conditions per place. [2022-07-12 10:21:48,734 INFO L132 encePairwiseOnDemand]: 247/258 looper letters, 100 selfloop transitions, 14 changer transitions 2/321 dead transitions. [2022-07-12 10:21:48,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 321 transitions, 1662 flow [2022-07-12 10:21:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:21:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:21:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2065 transitions. [2022-07-12 10:21:48,737 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8003875968992248 [2022-07-12 10:21:48,737 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2065 transitions. [2022-07-12 10:21:48,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2065 transitions. [2022-07-12 10:21:48,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:48,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2065 transitions. [2022-07-12 10:21:48,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.5) internal successors, (2065), 10 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 10:21:48,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states 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 10:21:48,743 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states 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 10:21:48,743 INFO L186 Difference]: Start difference. First operand has 343 places, 309 transitions, 1399 flow. Second operand 10 states and 2065 transitions. [2022-07-12 10:21:48,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 321 transitions, 1662 flow [2022-07-12 10:21:48,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 321 transitions, 1558 flow, removed 36 selfloop flow, removed 11 redundant places. [2022-07-12 10:21:48,759 INFO L242 Difference]: Finished difference. Result has 339 places, 304 transitions, 1289 flow [2022-07-12 10:21:48,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1289, PETRI_PLACES=339, PETRI_TRANSITIONS=304} [2022-07-12 10:21:48,761 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 106 predicate places. [2022-07-12 10:21:48,761 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 304 transitions, 1289 flow [2022-07-12 10:21:48,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states 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 10:21:48,762 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:48,762 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] [2022-07-12 10:21:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:21:48,762 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:48,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1611315835, now seen corresponding path program 1 times [2022-07-12 10:21:48,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:48,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76079401] [2022-07-12 10:21:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:48,863 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 10:21:48,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:48,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76079401] [2022-07-12 10:21:48,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76079401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:48,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:48,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:21:48,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209514390] [2022-07-12 10:21:48,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:48,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:21:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:21:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:21:48,866 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-12 10:21:48,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 304 transitions, 1289 flow. Second operand has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states 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 10:21:48,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:48,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-12 10:21:48,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:49,495 INFO L129 PetriNetUnfolder]: 597/5064 cut-off events. [2022-07-12 10:21:49,495 INFO L130 PetriNetUnfolder]: For 3584/3615 co-relation queries the response was YES. [2022-07-12 10:21:49,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8397 conditions, 5064 events. 597/5064 cut-off events. For 3584/3615 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 49103 event pairs, 399 based on Foata normal form. 35/4747 useless extension candidates. Maximal degree in co-relation 8357. Up to 1127 conditions per place. [2022-07-12 10:21:49,521 INFO L132 encePairwiseOnDemand]: 247/258 looper letters, 69 selfloop transitions, 10 changer transitions 38/313 dead transitions. [2022-07-12 10:21:49,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 313 transitions, 1534 flow [2022-07-12 10:21:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:21:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:21:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2063 transitions. [2022-07-12 10:21:49,523 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7996124031007752 [2022-07-12 10:21:49,523 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2063 transitions. [2022-07-12 10:21:49,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2063 transitions. [2022-07-12 10:21:49,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:49,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2063 transitions. [2022-07-12 10:21:49,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.3) internal successors, (2063), 10 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states 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 10:21:49,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states 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 10:21:49,528 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states 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 10:21:49,528 INFO L186 Difference]: Start difference. First operand has 339 places, 304 transitions, 1289 flow. Second operand 10 states and 2063 transitions. [2022-07-12 10:21:49,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 313 transitions, 1534 flow [2022-07-12 10:21:49,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 313 transitions, 1492 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-07-12 10:21:49,539 INFO L242 Difference]: Finished difference. Result has 340 places, 274 transitions, 1025 flow [2022-07-12 10:21:49,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1025, PETRI_PLACES=340, PETRI_TRANSITIONS=274} [2022-07-12 10:21:49,540 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 107 predicate places. [2022-07-12 10:21:49,540 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 274 transitions, 1025 flow [2022-07-12 10:21:49,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states 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 10:21:49,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:49,541 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:49,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:21:49,541 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1329761704, now seen corresponding path program 2 times [2022-07-12 10:21:49,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:49,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275571178] [2022-07-12 10:21:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:49,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:49,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275571178] [2022-07-12 10:21:49,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275571178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:49,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337640123] [2022-07-12 10:21:49,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:21:49,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:49,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:49,706 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 10:21:49,721 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 10:21:49,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:21:49,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:21:49,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 10:21:49,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 10:21:50,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:21:50,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337640123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:50,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:21:50,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 28 [2022-07-12 10:21:50,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125134181] [2022-07-12 10:21:50,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:50,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:21:50,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:21:50,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-07-12 10:21:50,053 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 258 [2022-07-12 10:21:50,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 274 transitions, 1025 flow. Second operand has 12 states, 12 states have (on average 190.83333333333334) internal successors, (2290), 12 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states 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 10:21:50,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:50,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 258 [2022-07-12 10:21:50,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:50,833 INFO L129 PetriNetUnfolder]: 289/3868 cut-off events. [2022-07-12 10:21:50,834 INFO L130 PetriNetUnfolder]: For 3003/3102 co-relation queries the response was YES. [2022-07-12 10:21:50,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6138 conditions, 3868 events. 289/3868 cut-off events. For 3003/3102 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 35476 event pairs, 30 based on Foata normal form. 33/3649 useless extension candidates. Maximal degree in co-relation 6097. Up to 338 conditions per place. [2022-07-12 10:21:50,853 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 79 selfloop transitions, 21 changer transitions 12/316 dead transitions. [2022-07-12 10:21:50,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 316 transitions, 1419 flow [2022-07-12 10:21:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:21:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:21:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2704 transitions. [2022-07-12 10:21:50,855 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7486157253599114 [2022-07-12 10:21:50,855 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2704 transitions. [2022-07-12 10:21:50,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2704 transitions. [2022-07-12 10:21:50,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:50,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2704 transitions. [2022-07-12 10:21:50,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.14285714285714) internal successors, (2704), 14 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states 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 10:21:50,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states 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 10:21:50,861 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states 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 10:21:50,862 INFO L186 Difference]: Start difference. First operand has 340 places, 274 transitions, 1025 flow. Second operand 14 states and 2704 transitions. [2022-07-12 10:21:50,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 316 transitions, 1419 flow [2022-07-12 10:21:50,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 316 transitions, 1296 flow, removed 32 selfloop flow, removed 23 redundant places. [2022-07-12 10:21:50,870 INFO L242 Difference]: Finished difference. Result has 315 places, 277 transitions, 1043 flow [2022-07-12 10:21:50,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1043, PETRI_PLACES=315, PETRI_TRANSITIONS=277} [2022-07-12 10:21:50,871 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 82 predicate places. [2022-07-12 10:21:50,871 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 277 transitions, 1043 flow [2022-07-12 10:21:50,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.83333333333334) internal successors, (2290), 12 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states 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 10:21:50,872 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:50,872 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] [2022-07-12 10:21:50,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 10:21:51,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:51,086 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash -118345649, now seen corresponding path program 1 times [2022-07-12 10:21:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:51,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658671686] [2022-07-12 10:21:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:51,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:21:51,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658671686] [2022-07-12 10:21:51,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658671686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:51,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:51,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:21:51,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800510746] [2022-07-12 10:21:51,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:21:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:21:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:21:51,157 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-12 10:21:51,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 277 transitions, 1043 flow. Second operand has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 10:21:51,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:51,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-12 10:21:51,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:51,666 INFO L129 PetriNetUnfolder]: 404/4262 cut-off events. [2022-07-12 10:21:51,667 INFO L130 PetriNetUnfolder]: For 2969/3018 co-relation queries the response was YES. [2022-07-12 10:21:51,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 4262 events. 404/4262 cut-off events. For 2969/3018 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 40782 event pairs, 223 based on Foata normal form. 39/4013 useless extension candidates. Maximal degree in co-relation 6830. Up to 649 conditions per place. [2022-07-12 10:21:51,698 INFO L132 encePairwiseOnDemand]: 249/258 looper letters, 76 selfloop transitions, 13 changer transitions 2/288 dead transitions. [2022-07-12 10:21:51,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 288 transitions, 1270 flow [2022-07-12 10:21:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:21:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:21:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1655 transitions. [2022-07-12 10:21:51,700 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8018410852713178 [2022-07-12 10:21:51,700 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1655 transitions. [2022-07-12 10:21:51,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1655 transitions. [2022-07-12 10:21:51,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:51,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1655 transitions. [2022-07-12 10:21:51,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.875) internal successors, (1655), 8 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states 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 10:21:51,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states 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 10:21:51,704 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states 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 10:21:51,704 INFO L186 Difference]: Start difference. First operand has 315 places, 277 transitions, 1043 flow. Second operand 8 states and 1655 transitions. [2022-07-12 10:21:51,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 288 transitions, 1270 flow [2022-07-12 10:21:51,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 288 transitions, 1204 flow, removed 23 selfloop flow, removed 12 redundant places. [2022-07-12 10:21:51,715 INFO L242 Difference]: Finished difference. Result has 300 places, 275 transitions, 999 flow [2022-07-12 10:21:51,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=999, PETRI_PLACES=300, PETRI_TRANSITIONS=275} [2022-07-12 10:21:51,715 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 67 predicate places. [2022-07-12 10:21:51,716 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 275 transitions, 999 flow [2022-07-12 10:21:51,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 10:21:51,716 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:51,716 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] [2022-07-12 10:21:51,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:21:51,717 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:51,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1669631243, now seen corresponding path program 1 times [2022-07-12 10:21:51,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:51,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829728400] [2022-07-12 10:21:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:51,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:21:51,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:51,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829728400] [2022-07-12 10:21:51,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829728400] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:51,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:51,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:21:51,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851896316] [2022-07-12 10:21:51,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:51,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:21:51,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:21:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:21:51,764 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-12 10:21:51,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 275 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 10:21:51,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:51,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-12 10:21:51,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:52,144 INFO L129 PetriNetUnfolder]: 398/3387 cut-off events. [2022-07-12 10:21:52,144 INFO L130 PetriNetUnfolder]: For 2178/2197 co-relation queries the response was YES. [2022-07-12 10:21:52,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5617 conditions, 3387 events. 398/3387 cut-off events. For 2178/2197 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 29486 event pairs, 241 based on Foata normal form. 30/3164 useless extension candidates. Maximal degree in co-relation 5587. Up to 724 conditions per place. [2022-07-12 10:21:52,164 INFO L132 encePairwiseOnDemand]: 249/258 looper letters, 63 selfloop transitions, 10 changer transitions 17/282 dead transitions. [2022-07-12 10:21:52,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 282 transitions, 1192 flow [2022-07-12 10:21:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:21:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:21:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1653 transitions. [2022-07-12 10:21:52,166 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8008720930232558 [2022-07-12 10:21:52,166 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1653 transitions. [2022-07-12 10:21:52,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1653 transitions. [2022-07-12 10:21:52,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:52,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1653 transitions. [2022-07-12 10:21:52,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.625) internal successors, (1653), 8 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states 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 10:21:52,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states 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 10:21:52,169 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states 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 10:21:52,170 INFO L186 Difference]: Start difference. First operand has 300 places, 275 transitions, 999 flow. Second operand 8 states and 1653 transitions. [2022-07-12 10:21:52,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 282 transitions, 1192 flow [2022-07-12 10:21:52,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 282 transitions, 1154 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-12 10:21:52,177 INFO L242 Difference]: Finished difference. Result has 301 places, 263 transitions, 888 flow [2022-07-12 10:21:52,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=301, PETRI_TRANSITIONS=263} [2022-07-12 10:21:52,178 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 68 predicate places. [2022-07-12 10:21:52,178 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 263 transitions, 888 flow [2022-07-12 10:21:52,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 10:21:52,179 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:52,179 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] [2022-07-12 10:21:52,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:21:52,179 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:52,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1705634450, now seen corresponding path program 1 times [2022-07-12 10:21:52,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:52,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596788480] [2022-07-12 10:21:52,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:52,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:52,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596788480] [2022-07-12 10:21:52,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596788480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:52,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:52,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:21:52,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035314359] [2022-07-12 10:21:52,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:52,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:21:52,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:52,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:21:52,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:21:52,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 258 [2022-07-12 10:21:52,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 263 transitions, 888 flow. Second operand has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states 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 10:21:52,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:52,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 258 [2022-07-12 10:21:52,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:56,794 INFO L129 PetriNetUnfolder]: 10589/37010 cut-off events. [2022-07-12 10:21:56,795 INFO L130 PetriNetUnfolder]: For 12303/12327 co-relation queries the response was YES. [2022-07-12 10:21:56,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63314 conditions, 37010 events. 10589/37010 cut-off events. For 12303/12327 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 481444 event pairs, 4993 based on Foata normal form. 7/34606 useless extension candidates. Maximal degree in co-relation 63285. Up to 7885 conditions per place. [2022-07-12 10:21:56,997 INFO L132 encePairwiseOnDemand]: 229/258 looper letters, 189 selfloop transitions, 39 changer transitions 0/425 dead transitions. [2022-07-12 10:21:56,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 425 transitions, 1769 flow [2022-07-12 10:21:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:21:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:21:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3982 transitions. [2022-07-12 10:21:57,001 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7349575489110373 [2022-07-12 10:21:57,001 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3982 transitions. [2022-07-12 10:21:57,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3982 transitions. [2022-07-12 10:21:57,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:57,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3982 transitions. [2022-07-12 10:21:57,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 189.61904761904762) internal successors, (3982), 21 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states 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 10:21:57,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states 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 10:21:57,008 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states 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 10:21:57,008 INFO L186 Difference]: Start difference. First operand has 301 places, 263 transitions, 888 flow. Second operand 21 states and 3982 transitions. [2022-07-12 10:21:57,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 425 transitions, 1769 flow [2022-07-12 10:21:57,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 425 transitions, 1684 flow, removed 11 selfloop flow, removed 12 redundant places. [2022-07-12 10:21:57,043 INFO L242 Difference]: Finished difference. Result has 313 places, 286 transitions, 1032 flow [2022-07-12 10:21:57,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1032, PETRI_PLACES=313, PETRI_TRANSITIONS=286} [2022-07-12 10:21:57,044 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 80 predicate places. [2022-07-12 10:21:57,044 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 286 transitions, 1032 flow [2022-07-12 10:21:57,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states 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 10:21:57,044 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:57,045 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] [2022-07-12 10:21:57,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:21:57,045 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:21:57,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:57,045 INFO L85 PathProgramCache]: Analyzing trace with hash 963524540, now seen corresponding path program 2 times [2022-07-12 10:21:57,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:57,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516142466] [2022-07-12 10:21:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:57,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:21:57,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:57,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516142466] [2022-07-12 10:21:57,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516142466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:57,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:57,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:21:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167622148] [2022-07-12 10:21:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:57,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:21:57,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:21:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:21:57,327 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 258 [2022-07-12 10:21:57,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 286 transitions, 1032 flow. Second operand has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states 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 10:21:57,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:57,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 258 [2022-07-12 10:21:57,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:22:05,967 INFO L129 PetriNetUnfolder]: 21696/73389 cut-off events. [2022-07-12 10:22:05,968 INFO L130 PetriNetUnfolder]: For 33451/33502 co-relation queries the response was YES. [2022-07-12 10:22:06,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140592 conditions, 73389 events. 21696/73389 cut-off events. For 33451/33502 co-relation queries the response was YES. Maximal size of possible extension queue 1882. Compared 1038089 event pairs, 10573 based on Foata normal form. 82/70657 useless extension candidates. Maximal degree in co-relation 140557. Up to 15943 conditions per place. [2022-07-12 10:22:06,833 INFO L132 encePairwiseOnDemand]: 228/258 looper letters, 221 selfloop transitions, 62 changer transitions 0/480 dead transitions. [2022-07-12 10:22:06,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 480 transitions, 2314 flow [2022-07-12 10:22:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:22:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:22:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4897 transitions. [2022-07-12 10:22:06,837 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7300238521168754 [2022-07-12 10:22:06,837 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4897 transitions. [2022-07-12 10:22:06,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4897 transitions. [2022-07-12 10:22:06,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:22:06,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4897 transitions. [2022-07-12 10:22:06,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 188.34615384615384) internal successors, (4897), 26 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states 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 10:22:06,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 258.0) internal successors, (6966), 27 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states 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 10:22:06,845 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 258.0) internal successors, (6966), 27 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states 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 10:22:06,846 INFO L186 Difference]: Start difference. First operand has 313 places, 286 transitions, 1032 flow. Second operand 26 states and 4897 transitions. [2022-07-12 10:22:06,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 480 transitions, 2314 flow [2022-07-12 10:22:07,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 480 transitions, 2287 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-12 10:22:07,017 INFO L242 Difference]: Finished difference. Result has 342 places, 330 transitions, 1471 flow [2022-07-12 10:22:07,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1471, PETRI_PLACES=342, PETRI_TRANSITIONS=330} [2022-07-12 10:22:07,018 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 109 predicate places. [2022-07-12 10:22:07,018 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 330 transitions, 1471 flow [2022-07-12 10:22:07,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states 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 10:22:07,018 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:22:07,019 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] [2022-07-12 10:22:07,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:22:07,019 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:22:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:22:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash 281417016, now seen corresponding path program 3 times [2022-07-12 10:22:07,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:22:07,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892422880] [2022-07-12 10:22:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:22:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:22:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:22:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:22:07,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:22:07,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892422880] [2022-07-12 10:22:07,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892422880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:22:07,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898937381] [2022-07-12 10:22:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:22:07,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:22:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:22:07,349 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 10:22:07,349 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 10:22:07,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:22:07,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:22:07,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 10:22:07,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:22:07,786 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 10:22:07,894 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 10:22:07,957 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 10:22:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:22:08,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:22:08,446 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int)) (~a1~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_372))) (let ((.cse0 (select .cse3 c_~a2~0.base)) (.cse1 (select .cse3 ~a1~0.base))) (or (not (= (select .cse0 c_~a2~0.offset) (select .cse1 c_~a1~0.offset))) (let ((.cse2 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (= (select .cse0 (+ .cse2 c_~a2~0.offset)) (select .cse1 (+ .cse2 c_~a1~0.offset)))))))) is different from false [2022-07-12 10:22:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:22:08,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898937381] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:22:08,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:22:08,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20, 24] total 50 [2022-07-12 10:22:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846132812] [2022-07-12 10:22:08,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:22:08,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:22:08,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:22:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:22:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2119, Unknown=1, NotChecked=94, Total=2450 [2022-07-12 10:22:08,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 258 [2022-07-12 10:22:08,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 330 transitions, 1471 flow. Second operand has 10 states, 10 states have (on average 195.7) internal successors, (1957), 10 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states 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 10:22:08,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:22:08,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 258 [2022-07-12 10:22:08,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:22:08,749 WARN L833 $PredicateComparison]: unable to prove that (and (or (= |c_thread1Thread1of1ForFork1_#t~mem2#1| |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= |c_thread2Thread1of1ForFork0_#t~mem8#1| |c_thread2Thread1of1ForFork0_#t~mem7#1|))) (forall ((v_ArrVal_372 (Array Int Int)) (~a1~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_372))) (let ((.cse0 (select .cse3 c_~a2~0.base)) (.cse1 (select .cse3 ~a1~0.base))) (or (not (= (select .cse0 c_~a2~0.offset) (select .cse1 c_~a1~0.offset))) (let ((.cse2 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (= (select .cse0 (+ .cse2 c_~a2~0.offset)) (select .cse1 (+ .cse2 c_~a1~0.offset))))))))) is different from false [2022-07-12 10:22:19,601 INFO L129 PetriNetUnfolder]: 25138/86367 cut-off events. [2022-07-12 10:22:19,602 INFO L130 PetriNetUnfolder]: For 89339/89418 co-relation queries the response was YES. [2022-07-12 10:22:20,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185089 conditions, 86367 events. 25138/86367 cut-off events. For 89339/89418 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 1258203 event pairs, 16062 based on Foata normal form. 134/83090 useless extension candidates. Maximal degree in co-relation 185042. Up to 33912 conditions per place. [2022-07-12 10:22:20,619 INFO L132 encePairwiseOnDemand]: 230/258 looper letters, 210 selfloop transitions, 113 changer transitions 0/536 dead transitions. [2022-07-12 10:22:20,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 536 transitions, 3312 flow [2022-07-12 10:22:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 10:22:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-12 10:22:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3075 transitions. [2022-07-12 10:22:20,622 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945736434108527 [2022-07-12 10:22:20,622 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3075 transitions. [2022-07-12 10:22:20,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3075 transitions. [2022-07-12 10:22:20,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:22:20,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3075 transitions. [2022-07-12 10:22:20,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 205.0) internal successors, (3075), 15 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states 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 10:22:20,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states 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 10:22:20,633 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states 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 10:22:20,633 INFO L186 Difference]: Start difference. First operand has 342 places, 330 transitions, 1471 flow. Second operand 15 states and 3075 transitions. [2022-07-12 10:22:20,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 536 transitions, 3312 flow [2022-07-12 10:22:21,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 536 transitions, 3209 flow, removed 38 selfloop flow, removed 8 redundant places. [2022-07-12 10:22:21,350 INFO L242 Difference]: Finished difference. Result has 361 places, 430 transitions, 2602 flow [2022-07-12 10:22:21,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2602, PETRI_PLACES=361, PETRI_TRANSITIONS=430} [2022-07-12 10:22:21,350 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 128 predicate places. [2022-07-12 10:22:21,351 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 430 transitions, 2602 flow [2022-07-12 10:22:21,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.7) internal successors, (1957), 10 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states 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 10:22:21,351 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:22:21,351 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] [2022-07-12 10:22:21,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 10:22:21,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:22:21,568 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:22:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:22:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1369574976, now seen corresponding path program 1 times [2022-07-12 10:22:21,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:22:21,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110348129] [2022-07-12 10:22:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:22:21,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:22:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:22:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:22:21,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:22:21,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110348129] [2022-07-12 10:22:21,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110348129] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:22:21,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180608413] [2022-07-12 10:22:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:22:21,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:22:21,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:22:21,892 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:22:21,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:22:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:22:21,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 10:22:21,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:22:22,136 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 10:22:22,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-12 10:22:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:22:22,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:22:22,302 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-12 10:22:22,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-07-12 10:22:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:22:22,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180608413] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:22:22,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:22:22,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 31 [2022-07-12 10:22:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470343710] [2022-07-12 10:22:22,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:22:22,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 10:22:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:22:22,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 10:22:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-07-12 10:22:22,349 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 258 [2022-07-12 10:22:22,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 430 transitions, 2602 flow. Second operand has 31 states, 31 states have (on average 182.38709677419354) internal successors, (5654), 31 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states 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 10:22:22,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:22:22,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 258 [2022-07-12 10:22:22,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand