./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF --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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:56:09,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:56:09,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:56:09,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:56:09,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:56:09,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:56:09,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:56:09,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:56:09,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:56:09,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:56:09,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:56:09,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:56:09,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:56:09,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:56:09,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:56:09,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:56:09,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:56:09,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:56:09,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:56:09,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:56:09,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:56:09,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:56:09,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:56:09,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:56:09,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:56:09,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:56:09,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:56:09,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:56:09,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:56:09,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:56:09,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:56:09,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:56:09,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:56:09,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:56:09,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:56:09,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:56:09,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:56:09,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:56:09,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:56:09,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:56:09,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:56:09,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:56:09,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:56:09,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:56:09,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:56:09,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:56:09,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:56:09,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:56:09,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:56:09,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:56:09,549 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:56:09,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:56:09,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:56:09,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:56:09,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:56:09,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:56:09,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:56:09,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:56:09,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:56:09,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:56:09,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:56:09,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:56:09,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:56:09,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:56:09,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:56:09,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:56:09,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:56:09,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:56:09,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:56:09,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:56:09,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:56:09,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:56:09,555 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:56:09,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:56:09,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:56:09,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:56:09,556 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2021-11-20 05:56:09,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:56:09,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:56:09,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:56:09,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:56:09,955 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:56:09,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2021-11-20 05:56:10,040 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/data/0bd7293d8/9971f8dd5a734deeaecb141744a6ab3e/FLAGcf7213fdd [2021-11-20 05:56:10,624 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:56:10,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2021-11-20 05:56:10,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/data/0bd7293d8/9971f8dd5a734deeaecb141744a6ab3e/FLAGcf7213fdd [2021-11-20 05:56:10,940 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/data/0bd7293d8/9971f8dd5a734deeaecb141744a6ab3e [2021-11-20 05:56:10,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:56:10,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:56:10,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:56:10,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:56:10,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:56:10,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:56:10" (1/1) ... [2021-11-20 05:56:10,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10176ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:10, skipping insertion in model container [2021-11-20 05:56:10,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:56:10" (1/1) ... [2021-11-20 05:56:10,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:56:11,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:56:11,231 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2021-11-20 05:56:11,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:56:11,260 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:56:11,317 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2021-11-20 05:56:11,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:56:11,358 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:56:11,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11 WrapperNode [2021-11-20 05:56:11,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:56:11,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:56:11,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:56:11,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:56:11,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,428 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2021-11-20 05:56:11,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:56:11,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:56:11,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:56:11,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:56:11,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:56:11,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:56:11,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:56:11,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:56:11,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (1/1) ... [2021-11-20 05:56:11,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:56:11,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:11,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:56:11,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:56:11,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:56:11,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 05:56:11,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 05:56:11,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 05:56:11,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 05:56:11,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:56:11,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:56:11,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:56:11,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-20 05:56:11,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-20 05:56:11,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:56:11,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:56:11,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:56:11,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:56:11,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:56:11,572 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 05:56:11,724 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:56:11,726 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:56:12,185 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:56:12,356 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:56:12,356 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 05:56:12,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:56:12 BoogieIcfgContainer [2021-11-20 05:56:12,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:56:12,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:56:12,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:56:12,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:56:12,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:56:10" (1/3) ... [2021-11-20 05:56:12,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3bcfe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:56:12, skipping insertion in model container [2021-11-20 05:56:12,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:11" (2/3) ... [2021-11-20 05:56:12,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3bcfe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:56:12, skipping insertion in model container [2021-11-20 05:56:12,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:56:12" (3/3) ... [2021-11-20 05:56:12,372 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2021-11-20 05:56:12,378 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 05:56:12,379 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:56:12,379 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:56:12,379 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 05:56:12,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,424 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,424 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,424 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,425 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,425 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,425 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,426 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,426 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,426 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,426 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,427 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,427 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,427 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,428 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,428 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,428 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,429 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,429 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,430 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,430 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,430 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,431 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,432 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,433 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,433 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,433 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,434 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,434 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,434 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,434 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,435 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,435 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,436 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,436 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,436 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,441 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,441 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,443 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,443 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,443 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,443 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,444 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,444 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,446 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,446 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,446 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,446 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,448 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,452 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,452 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,453 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,453 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,453 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,453 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,454 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,454 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,454 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,455 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,455 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,456 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,457 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,457 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,457 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,457 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,458 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,458 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,458 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,459 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,459 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,459 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,459 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:56:12,462 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 05:56:12,517 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:56:12,526 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:56:12,527 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 05:56:12,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 346 flow [2021-11-20 05:56:12,643 INFO L129 PetriNetUnfolder]: 13/163 cut-off events. [2021-11-20 05:56:12,647 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 05:56:12,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2021-11-20 05:56:12,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 165 transitions, 346 flow [2021-11-20 05:56:12,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 154 transitions, 320 flow [2021-11-20 05:56:12,707 INFO L129 PetriNetUnfolder]: 13/153 cut-off events. [2021-11-20 05:56:12,707 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 05:56:12,708 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:12,709 INFO L254 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] [2021-11-20 05:56:12,709 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:12,716 INFO L85 PathProgramCache]: Analyzing trace with hash -971864850, now seen corresponding path program 1 times [2021-11-20 05:56:12,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:12,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523155140] [2021-11-20 05:56:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:12,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:13,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:13,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523155140] [2021-11-20 05:56:13,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523155140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:13,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:13,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:56:13,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817771209] [2021-11-20 05:56:13,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:13,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:13,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:13,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 165 [2021-11-20 05:56:13,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:13,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:13,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 165 [2021-11-20 05:56:13,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:13,635 INFO L129 PetriNetUnfolder]: 14/195 cut-off events. [2021-11-20 05:56:13,635 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-11-20 05:56:13,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 195 events. 14/195 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 261 event pairs, 0 based on Foata normal form. 20/202 useless extension candidates. Maximal degree in co-relation 150. Up to 23 conditions per place. [2021-11-20 05:56:13,639 INFO L132 encePairwiseOnDemand]: 145/165 looper letters, 28 selfloop transitions, 3 changer transitions 10/154 dead transitions. [2021-11-20 05:56:13,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 411 flow [2021-11-20 05:56:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:56:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 05:56:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 915 transitions. [2021-11-20 05:56:13,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2021-11-20 05:56:13,683 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 915 transitions. [2021-11-20 05:56:13,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 915 transitions. [2021-11-20 05:56:13,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:13,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 915 transitions. [2021-11-20 05:56:13,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:13,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:13,727 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:13,729 INFO L186 Difference]: Start difference. First operand has 148 places, 154 transitions, 320 flow. Second operand 7 states and 915 transitions. [2021-11-20 05:56:13,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 411 flow [2021-11-20 05:56:13,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 154 transitions, 397 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 05:56:13,743 INFO L242 Difference]: Finished difference. Result has 153 places, 142 transitions, 307 flow [2021-11-20 05:56:13,746 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2021-11-20 05:56:13,751 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 5 predicate places. [2021-11-20 05:56:13,751 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 307 flow [2021-11-20 05:56:13,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:13,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:13,753 INFO L254 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] [2021-11-20 05:56:13,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:56:13,753 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:13,754 INFO L85 PathProgramCache]: Analyzing trace with hash 202378132, now seen corresponding path program 1 times [2021-11-20 05:56:13,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:13,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964689563] [2021-11-20 05:56:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:13,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:13,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964689563] [2021-11-20 05:56:13,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964689563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762676079] [2021-11-20 05:56:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:13,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:13,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:14,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:14,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:56:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:14,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:56:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:15,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:56:15,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762676079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:15,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:56:15,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 05:56:15,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654038472] [2021-11-20 05:56:15,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:15,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:56:15,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:56:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:56:15,153 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2021-11-20 05:56:15,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:15,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:15,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2021-11-20 05:56:15,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:15,474 INFO L129 PetriNetUnfolder]: 15/265 cut-off events. [2021-11-20 05:56:15,474 INFO L130 PetriNetUnfolder]: For 28/31 co-relation queries the response was YES. [2021-11-20 05:56:15,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 265 events. 15/265 cut-off events. For 28/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 509 event pairs, 2 based on Foata normal form. 4/253 useless extension candidates. Maximal degree in co-relation 359. Up to 37 conditions per place. [2021-11-20 05:56:15,481 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 31 selfloop transitions, 9 changer transitions 17/163 dead transitions. [2021-11-20 05:56:15,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 163 transitions, 467 flow [2021-11-20 05:56:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:56:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-20 05:56:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1267 transitions. [2021-11-20 05:56:15,494 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7678787878787878 [2021-11-20 05:56:15,495 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1267 transitions. [2021-11-20 05:56:15,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1267 transitions. [2021-11-20 05:56:15,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:15,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1267 transitions. [2021-11-20 05:56:15,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.7) internal successors, (1267), 10 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:15,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:15,522 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:15,522 INFO L186 Difference]: Start difference. First operand has 153 places, 142 transitions, 307 flow. Second operand 10 states and 1267 transitions. [2021-11-20 05:56:15,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 163 transitions, 467 flow [2021-11-20 05:56:15,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 163 transitions, 460 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-20 05:56:15,539 INFO L242 Difference]: Finished difference. Result has 152 places, 143 transitions, 332 flow [2021-11-20 05:56:15,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=152, PETRI_TRANSITIONS=143} [2021-11-20 05:56:15,541 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 4 predicate places. [2021-11-20 05:56:15,542 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 143 transitions, 332 flow [2021-11-20 05:56:15,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:15,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:15,545 INFO L254 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] [2021-11-20 05:56:15,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:15,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:15,761 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:15,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1935558459, now seen corresponding path program 1 times [2021-11-20 05:56:15,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:15,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932490623] [2021-11-20 05:56:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:15,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:15,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:15,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932490623] [2021-11-20 05:56:15,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932490623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:15,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:15,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:56:15,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890274108] [2021-11-20 05:56:15,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:15,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:15,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:15,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:15,888 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:15,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 143 transitions, 332 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:15,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:15,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:15,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:16,093 INFO L129 PetriNetUnfolder]: 118/434 cut-off events. [2021-11-20 05:56:16,094 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2021-11-20 05:56:16,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 434 events. 118/434 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1592 event pairs, 37 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 662. Up to 126 conditions per place. [2021-11-20 05:56:16,101 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 36 selfloop transitions, 5 changer transitions 4/168 dead transitions. [2021-11-20 05:56:16,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 168 transitions, 491 flow [2021-11-20 05:56:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:56:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 05:56:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 864 transitions. [2021-11-20 05:56:16,106 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8727272727272727 [2021-11-20 05:56:16,107 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 864 transitions. [2021-11-20 05:56:16,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 864 transitions. [2021-11-20 05:56:16,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:16,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 864 transitions. [2021-11-20 05:56:16,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:16,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:16,118 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:16,118 INFO L186 Difference]: Start difference. First operand has 152 places, 143 transitions, 332 flow. Second operand 6 states and 864 transitions. [2021-11-20 05:56:16,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 168 transitions, 491 flow [2021-11-20 05:56:16,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 168 transitions, 475 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-11-20 05:56:16,131 INFO L242 Difference]: Finished difference. Result has 152 places, 145 transitions, 342 flow [2021-11-20 05:56:16,131 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=152, PETRI_TRANSITIONS=145} [2021-11-20 05:56:16,135 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 4 predicate places. [2021-11-20 05:56:16,136 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 145 transitions, 342 flow [2021-11-20 05:56:16,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:16,138 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:16,139 INFO L254 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] [2021-11-20 05:56:16,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:56:16,141 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash -774645913, now seen corresponding path program 2 times [2021-11-20 05:56:16,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:16,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288422197] [2021-11-20 05:56:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:16,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:16,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:16,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288422197] [2021-11-20 05:56:16,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288422197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:16,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002508889] [2021-11-20 05:56:16,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:56:16,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:16,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:16,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:16,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:56:16,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:56:16,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:16,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:56:16,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:16,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:17,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002508889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:17,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:17,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-11-20 05:56:17,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18371810] [2021-11-20 05:56:17,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:17,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:56:17,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:56:17,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:56:17,018 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:17,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 145 transitions, 342 flow. Second operand has 9 states, 9 states have (on average 139.66666666666666) internal successors, (1257), 9 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:17,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:17,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:17,427 INFO L129 PetriNetUnfolder]: 192/589 cut-off events. [2021-11-20 05:56:17,428 INFO L130 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2021-11-20 05:56:17,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 589 events. 192/589 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2561 event pairs, 7 based on Foata normal form. 9/593 useless extension candidates. Maximal degree in co-relation 1152. Up to 71 conditions per place. [2021-11-20 05:56:17,438 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 72 selfloop transitions, 31 changer transitions 1/227 dead transitions. [2021-11-20 05:56:17,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 227 transitions, 842 flow [2021-11-20 05:56:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:56:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 05:56:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2008 transitions. [2021-11-20 05:56:17,449 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8692640692640693 [2021-11-20 05:56:17,449 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2008 transitions. [2021-11-20 05:56:17,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2008 transitions. [2021-11-20 05:56:17,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:17,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2008 transitions. [2021-11-20 05:56:17,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.42857142857142) internal successors, (2008), 14 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,473 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,473 INFO L186 Difference]: Start difference. First operand has 152 places, 145 transitions, 342 flow. Second operand 14 states and 2008 transitions. [2021-11-20 05:56:17,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 227 transitions, 842 flow [2021-11-20 05:56:17,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 227 transitions, 815 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-11-20 05:56:17,486 INFO L242 Difference]: Finished difference. Result has 168 places, 177 transitions, 554 flow [2021-11-20 05:56:17,487 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=554, PETRI_PLACES=168, PETRI_TRANSITIONS=177} [2021-11-20 05:56:17,489 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 20 predicate places. [2021-11-20 05:56:17,490 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 177 transitions, 554 flow [2021-11-20 05:56:17,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.66666666666666) internal successors, (1257), 9 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,491 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:17,492 INFO L254 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] [2021-11-20 05:56:17,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:17,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:17,705 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1462097601, now seen corresponding path program 1 times [2021-11-20 05:56:17,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:17,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648221668] [2021-11-20 05:56:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:17,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:17,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648221668] [2021-11-20 05:56:17,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648221668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:17,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450592742] [2021-11-20 05:56:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:17,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:17,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:17,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:17,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:56:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:17,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:56:17,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:18,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:56:18,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450592742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:18,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:56:18,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 05:56:18,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140454943] [2021-11-20 05:56:18,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:18,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:56:18,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:56:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:56:18,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2021-11-20 05:56:18,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 177 transitions, 554 flow. Second operand has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:18,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2021-11-20 05:56:18,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:18,787 INFO L129 PetriNetUnfolder]: 68/475 cut-off events. [2021-11-20 05:56:18,788 INFO L130 PetriNetUnfolder]: For 284/300 co-relation queries the response was YES. [2021-11-20 05:56:18,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 475 events. 68/475 cut-off events. For 284/300 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1986 event pairs, 14 based on Foata normal form. 12/475 useless extension candidates. Maximal degree in co-relation 817. Up to 76 conditions per place. [2021-11-20 05:56:18,795 INFO L132 encePairwiseOnDemand]: 155/165 looper letters, 34 selfloop transitions, 7 changer transitions 5/186 dead transitions. [2021-11-20 05:56:18,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 186 transitions, 668 flow [2021-11-20 05:56:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:56:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-20 05:56:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1013 transitions. [2021-11-20 05:56:18,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7674242424242425 [2021-11-20 05:56:18,801 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1013 transitions. [2021-11-20 05:56:18,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1013 transitions. [2021-11-20 05:56:18,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:18,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1013 transitions. [2021-11-20 05:56:18,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.625) internal successors, (1013), 8 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,813 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,813 INFO L186 Difference]: Start difference. First operand has 168 places, 177 transitions, 554 flow. Second operand 8 states and 1013 transitions. [2021-11-20 05:56:18,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 186 transitions, 668 flow [2021-11-20 05:56:18,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 186 transitions, 666 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-11-20 05:56:18,826 INFO L242 Difference]: Finished difference. Result has 177 places, 178 transitions, 578 flow [2021-11-20 05:56:18,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=578, PETRI_PLACES=177, PETRI_TRANSITIONS=178} [2021-11-20 05:56:18,830 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 29 predicate places. [2021-11-20 05:56:18,831 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 178 transitions, 578 flow [2021-11-20 05:56:18,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:18,832 INFO L254 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] [2021-11-20 05:56:18,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:19,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:19,047 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash -533874036, now seen corresponding path program 1 times [2021-11-20 05:56:19,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:19,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100769121] [2021-11-20 05:56:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:19,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:19,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:19,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100769121] [2021-11-20 05:56:19,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100769121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:19,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:19,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:56:19,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443631735] [2021-11-20 05:56:19,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:19,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:19,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:19,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:19,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 178 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:19,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:19,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:19,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:19,455 INFO L129 PetriNetUnfolder]: 216/682 cut-off events. [2021-11-20 05:56:19,456 INFO L130 PetriNetUnfolder]: For 818/833 co-relation queries the response was YES. [2021-11-20 05:56:19,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 682 events. 216/682 cut-off events. For 818/833 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3308 event pairs, 80 based on Foata normal form. 8/678 useless extension candidates. Maximal degree in co-relation 1693. Up to 229 conditions per place. [2021-11-20 05:56:19,468 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 69 selfloop transitions, 16 changer transitions 1/210 dead transitions. [2021-11-20 05:56:19,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 914 flow [2021-11-20 05:56:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:56:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-20 05:56:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 737 transitions. [2021-11-20 05:56:19,472 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8933333333333333 [2021-11-20 05:56:19,473 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 737 transitions. [2021-11-20 05:56:19,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 737 transitions. [2021-11-20 05:56:19,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:19,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 737 transitions. [2021-11-20 05:56:19,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:19,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:19,483 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:19,483 INFO L186 Difference]: Start difference. First operand has 177 places, 178 transitions, 578 flow. Second operand 5 states and 737 transitions. [2021-11-20 05:56:19,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 914 flow [2021-11-20 05:56:19,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 210 transitions, 890 flow, removed 6 selfloop flow, removed 6 redundant places. [2021-11-20 05:56:19,497 INFO L242 Difference]: Finished difference. Result has 176 places, 185 transitions, 665 flow [2021-11-20 05:56:19,498 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=665, PETRI_PLACES=176, PETRI_TRANSITIONS=185} [2021-11-20 05:56:19,502 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 28 predicate places. [2021-11-20 05:56:19,502 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 185 transitions, 665 flow [2021-11-20 05:56:19,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:19,503 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:19,503 INFO L254 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] [2021-11-20 05:56:19,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:56:19,504 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:19,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1873111084, now seen corresponding path program 2 times [2021-11-20 05:56:19,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:19,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597989052] [2021-11-20 05:56:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:19,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:19,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597989052] [2021-11-20 05:56:19,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597989052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063753767] [2021-11-20 05:56:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:56:19,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:19,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:19,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:19,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:56:19,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:56:19,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:19,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:56:19,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:20,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:20,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063753767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:20,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:20,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-11-20 05:56:20,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337314632] [2021-11-20 05:56:20,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:20,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:56:20,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:20,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:56:20,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:56:20,462 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:20,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 185 transitions, 665 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:20,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:20,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:20,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:20,849 INFO L129 PetriNetUnfolder]: 228/776 cut-off events. [2021-11-20 05:56:20,849 INFO L130 PetriNetUnfolder]: For 1144/1148 co-relation queries the response was YES. [2021-11-20 05:56:20,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 776 events. 228/776 cut-off events. For 1144/1148 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4130 event pairs, 38 based on Foata normal form. 12/781 useless extension candidates. Maximal degree in co-relation 1959. Up to 137 conditions per place. [2021-11-20 05:56:20,862 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 74 selfloop transitions, 48 changer transitions 1/247 dead transitions. [2021-11-20 05:56:20,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 247 transitions, 1212 flow [2021-11-20 05:56:20,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:56:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-20 05:56:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1308 transitions. [2021-11-20 05:56:20,869 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8808080808080808 [2021-11-20 05:56:20,869 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1308 transitions. [2021-11-20 05:56:20,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1308 transitions. [2021-11-20 05:56:20,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:20,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1308 transitions. [2021-11-20 05:56:20,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.33333333333334) internal successors, (1308), 9 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:20,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:20,883 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:20,883 INFO L186 Difference]: Start difference. First operand has 176 places, 185 transitions, 665 flow. Second operand 9 states and 1308 transitions. [2021-11-20 05:56:20,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 247 transitions, 1212 flow [2021-11-20 05:56:20,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 247 transitions, 1200 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-20 05:56:20,898 INFO L242 Difference]: Finished difference. Result has 188 places, 205 transitions, 945 flow [2021-11-20 05:56:20,898 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=945, PETRI_PLACES=188, PETRI_TRANSITIONS=205} [2021-11-20 05:56:20,899 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 40 predicate places. [2021-11-20 05:56:20,899 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 205 transitions, 945 flow [2021-11-20 05:56:20,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:20,900 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:20,901 INFO L254 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] [2021-11-20 05:56:20,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:21,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:21,121 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:21,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1869100938, now seen corresponding path program 1 times [2021-11-20 05:56:21,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:21,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754962488] [2021-11-20 05:56:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:21,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:21,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:21,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754962488] [2021-11-20 05:56:21,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754962488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:21,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532655925] [2021-11-20 05:56:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:21,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:21,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:21,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:21,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:56:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:21,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:56:21,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:21,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:21,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532655925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:21,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:21,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-11-20 05:56:21,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971482364] [2021-11-20 05:56:21,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:21,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:56:21,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:56:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:56:21,837 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:21,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 205 transitions, 945 flow. Second operand has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:21,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:21,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:21,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:22,232 INFO L129 PetriNetUnfolder]: 260/848 cut-off events. [2021-11-20 05:56:22,232 INFO L130 PetriNetUnfolder]: For 1943/1943 co-relation queries the response was YES. [2021-11-20 05:56:22,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2567 conditions, 848 events. 260/848 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4670 event pairs, 27 based on Foata normal form. 5/846 useless extension candidates. Maximal degree in co-relation 2471. Up to 109 conditions per place. [2021-11-20 05:56:22,247 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 87 selfloop transitions, 75 changer transitions 0/286 dead transitions. [2021-11-20 05:56:22,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 286 transitions, 1760 flow [2021-11-20 05:56:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:56:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 05:56:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2004 transitions. [2021-11-20 05:56:22,257 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8675324675324675 [2021-11-20 05:56:22,257 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2004 transitions. [2021-11-20 05:56:22,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2004 transitions. [2021-11-20 05:56:22,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:22,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2004 transitions. [2021-11-20 05:56:22,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,277 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,277 INFO L186 Difference]: Start difference. First operand has 188 places, 205 transitions, 945 flow. Second operand 14 states and 2004 transitions. [2021-11-20 05:56:22,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 286 transitions, 1760 flow [2021-11-20 05:56:22,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 286 transitions, 1726 flow, removed 17 selfloop flow, removed 0 redundant places. [2021-11-20 05:56:22,304 INFO L242 Difference]: Finished difference. Result has 205 places, 237 transitions, 1402 flow [2021-11-20 05:56:22,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1402, PETRI_PLACES=205, PETRI_TRANSITIONS=237} [2021-11-20 05:56:22,308 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 57 predicate places. [2021-11-20 05:56:22,308 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 237 transitions, 1402 flow [2021-11-20 05:56:22,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,310 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:22,310 INFO L254 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] [2021-11-20 05:56:22,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:22,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 05:56:22,537 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash -89082242, now seen corresponding path program 2 times [2021-11-20 05:56:22,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:22,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146607889] [2021-11-20 05:56:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:22,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:22,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:22,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146607889] [2021-11-20 05:56:22,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146607889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:22,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:22,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:56:22,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279388698] [2021-11-20 05:56:22,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:22,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:22,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:22,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:22,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:22,671 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:22,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 237 transitions, 1402 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:22,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:22,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:22,974 INFO L129 PetriNetUnfolder]: 260/873 cut-off events. [2021-11-20 05:56:22,974 INFO L130 PetriNetUnfolder]: For 2861/2863 co-relation queries the response was YES. [2021-11-20 05:56:22,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2866 conditions, 873 events. 260/873 cut-off events. For 2861/2863 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4959 event pairs, 91 based on Foata normal form. 2/865 useless extension candidates. Maximal degree in co-relation 2765. Up to 282 conditions per place. [2021-11-20 05:56:22,990 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 110 selfloop transitions, 24 changer transitions 6/264 dead transitions. [2021-11-20 05:56:22,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 264 transitions, 1905 flow [2021-11-20 05:56:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:56:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 05:56:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 865 transitions. [2021-11-20 05:56:22,994 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8737373737373737 [2021-11-20 05:56:22,994 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 865 transitions. [2021-11-20 05:56:22,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 865 transitions. [2021-11-20 05:56:22,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:22,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 865 transitions. [2021-11-20 05:56:22,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.16666666666666) internal successors, (865), 6 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:23,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:23,003 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:23,003 INFO L186 Difference]: Start difference. First operand has 205 places, 237 transitions, 1402 flow. Second operand 6 states and 865 transitions. [2021-11-20 05:56:23,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 264 transitions, 1905 flow [2021-11-20 05:56:23,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 264 transitions, 1777 flow, removed 38 selfloop flow, removed 3 redundant places. [2021-11-20 05:56:23,037 INFO L242 Difference]: Finished difference. Result has 209 places, 237 transitions, 1343 flow [2021-11-20 05:56:23,038 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1343, PETRI_PLACES=209, PETRI_TRANSITIONS=237} [2021-11-20 05:56:23,039 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 61 predicate places. [2021-11-20 05:56:23,040 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 237 transitions, 1343 flow [2021-11-20 05:56:23,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:23,041 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:23,041 INFO L254 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] [2021-11-20 05:56:23,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 05:56:23,042 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash -552919854, now seen corresponding path program 3 times [2021-11-20 05:56:23,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:23,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218207522] [2021-11-20 05:56:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:23,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:23,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:23,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218207522] [2021-11-20 05:56:23,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218207522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:23,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169359684] [2021-11-20 05:56:23,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:56:23,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:23,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:23,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:23,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:56:23,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:56:23,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:23,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:56:23,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:23,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:23,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169359684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:23,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:23,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-11-20 05:56:23,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566555494] [2021-11-20 05:56:23,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:23,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:56:23,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:56:23,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:56:23,784 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:23,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 237 transitions, 1343 flow. Second operand has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:23,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:23,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:23,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:24,178 INFO L129 PetriNetUnfolder]: 268/907 cut-off events. [2021-11-20 05:56:24,178 INFO L130 PetriNetUnfolder]: For 2753/2753 co-relation queries the response was YES. [2021-11-20 05:56:24,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 907 events. 268/907 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5293 event pairs, 78 based on Foata normal form. 5/901 useless extension candidates. Maximal degree in co-relation 2767. Up to 182 conditions per place. [2021-11-20 05:56:24,194 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 108 selfloop transitions, 55 changer transitions 1/288 dead transitions. [2021-11-20 05:56:24,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 288 transitions, 1966 flow [2021-11-20 05:56:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:56:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-20 05:56:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1307 transitions. [2021-11-20 05:56:24,200 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8801346801346801 [2021-11-20 05:56:24,201 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1307 transitions. [2021-11-20 05:56:24,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1307 transitions. [2021-11-20 05:56:24,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:24,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1307 transitions. [2021-11-20 05:56:24,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.22222222222223) internal successors, (1307), 9 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:24,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:24,214 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:24,214 INFO L186 Difference]: Start difference. First operand has 209 places, 237 transitions, 1343 flow. Second operand 9 states and 1307 transitions. [2021-11-20 05:56:24,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 288 transitions, 1966 flow [2021-11-20 05:56:24,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 288 transitions, 1938 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-11-20 05:56:24,253 INFO L242 Difference]: Finished difference. Result has 217 places, 249 transitions, 1610 flow [2021-11-20 05:56:24,255 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1610, PETRI_PLACES=217, PETRI_TRANSITIONS=249} [2021-11-20 05:56:24,256 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 69 predicate places. [2021-11-20 05:56:24,256 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 249 transitions, 1610 flow [2021-11-20 05:56:24,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:24,272 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:24,272 INFO L254 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] [2021-11-20 05:56:24,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:24,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:56:24,507 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:24,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1815906442, now seen corresponding path program 3 times [2021-11-20 05:56:24,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:24,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968030794] [2021-11-20 05:56:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:24,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:24,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:24,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968030794] [2021-11-20 05:56:24,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968030794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:24,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971829929] [2021-11-20 05:56:24,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:56:24,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:24,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:24,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:24,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:56:24,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:56:24,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:24,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:56:24,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:25,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:25,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971829929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:25,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:25,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-11-20 05:56:25,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458619504] [2021-11-20 05:56:25,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:25,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:56:25,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:25,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:56:25,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:56:25,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:25,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 249 transitions, 1610 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:25,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:25,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:25,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:25,877 INFO L129 PetriNetUnfolder]: 306/1052 cut-off events. [2021-11-20 05:56:25,878 INFO L130 PetriNetUnfolder]: For 4008/4008 co-relation queries the response was YES. [2021-11-20 05:56:25,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3447 conditions, 1052 events. 306/1052 cut-off events. For 4008/4008 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6595 event pairs, 40 based on Foata normal form. 6/1048 useless extension candidates. Maximal degree in co-relation 3343. Up to 139 conditions per place. [2021-11-20 05:56:25,897 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 109 selfloop transitions, 80 changer transitions 2/315 dead transitions. [2021-11-20 05:56:25,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 315 transitions, 2365 flow [2021-11-20 05:56:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:56:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-20 05:56:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1877 transitions. [2021-11-20 05:56:25,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875058275058275 [2021-11-20 05:56:25,905 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1877 transitions. [2021-11-20 05:56:25,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1877 transitions. [2021-11-20 05:56:25,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:25,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1877 transitions. [2021-11-20 05:56:25,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 144.3846153846154) internal successors, (1877), 13 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:25,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:25,921 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:25,922 INFO L186 Difference]: Start difference. First operand has 217 places, 249 transitions, 1610 flow. Second operand 13 states and 1877 transitions. [2021-11-20 05:56:25,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 315 transitions, 2365 flow [2021-11-20 05:56:25,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 315 transitions, 2202 flow, removed 25 selfloop flow, removed 6 redundant places. [2021-11-20 05:56:25,974 INFO L242 Difference]: Finished difference. Result has 225 places, 259 transitions, 1736 flow [2021-11-20 05:56:25,974 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1736, PETRI_PLACES=225, PETRI_TRANSITIONS=259} [2021-11-20 05:56:25,975 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 77 predicate places. [2021-11-20 05:56:25,975 INFO L470 AbstractCegarLoop]: Abstraction has has 225 places, 259 transitions, 1736 flow [2021-11-20 05:56:25,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:25,976 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:25,977 INFO L254 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] [2021-11-20 05:56:26,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 05:56:26,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:26,201 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1175586544, now seen corresponding path program 4 times [2021-11-20 05:56:26,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:26,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136322590] [2021-11-20 05:56:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:26,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:26,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:26,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136322590] [2021-11-20 05:56:26,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136322590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:26,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:26,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:56:26,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848736189] [2021-11-20 05:56:26,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:26,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:26,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:26,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:26,294 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:26,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 259 transitions, 1736 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:26,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:26,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:26,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:26,681 INFO L129 PetriNetUnfolder]: 295/971 cut-off events. [2021-11-20 05:56:26,682 INFO L130 PetriNetUnfolder]: For 3657/3661 co-relation queries the response was YES. [2021-11-20 05:56:26,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 971 events. 295/971 cut-off events. For 3657/3661 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5764 event pairs, 94 based on Foata normal form. 3/962 useless extension candidates. Maximal degree in co-relation 3157. Up to 371 conditions per place. [2021-11-20 05:56:26,696 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 129 selfloop transitions, 29 changer transitions 9/291 dead transitions. [2021-11-20 05:56:26,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 291 transitions, 2330 flow [2021-11-20 05:56:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:56:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 05:56:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2021-11-20 05:56:26,700 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8848484848484849 [2021-11-20 05:56:26,700 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2021-11-20 05:56:26,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2021-11-20 05:56:26,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:26,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2021-11-20 05:56:26,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:26,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:26,708 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:26,708 INFO L186 Difference]: Start difference. First operand has 225 places, 259 transitions, 1736 flow. Second operand 6 states and 876 transitions. [2021-11-20 05:56:26,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 291 transitions, 2330 flow [2021-11-20 05:56:26,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 291 transitions, 2315 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-20 05:56:26,742 INFO L242 Difference]: Finished difference. Result has 230 places, 259 transitions, 1794 flow [2021-11-20 05:56:26,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1794, PETRI_PLACES=230, PETRI_TRANSITIONS=259} [2021-11-20 05:56:26,744 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 82 predicate places. [2021-11-20 05:56:26,744 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 259 transitions, 1794 flow [2021-11-20 05:56:26,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:26,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:26,745 INFO L254 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] [2021-11-20 05:56:26,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 05:56:26,746 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1649527968, now seen corresponding path program 4 times [2021-11-20 05:56:26,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:26,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370458246] [2021-11-20 05:56:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:26,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:26,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:26,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370458246] [2021-11-20 05:56:26,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370458246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:26,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:26,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:56:26,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013679336] [2021-11-20 05:56:26,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:26,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:56:26,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:56:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:56:26,844 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:26,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 259 transitions, 1794 flow. Second operand has 6 states, 6 states have (on average 139.33333333333334) internal successors, (836), 6 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:26,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:26,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:26,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:27,240 INFO L129 PetriNetUnfolder]: 315/1013 cut-off events. [2021-11-20 05:56:27,241 INFO L130 PetriNetUnfolder]: For 3875/3875 co-relation queries the response was YES. [2021-11-20 05:56:27,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1013 events. 315/1013 cut-off events. For 3875/3875 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6061 event pairs, 89 based on Foata normal form. 5/1009 useless extension candidates. Maximal degree in co-relation 3360. Up to 271 conditions per place. [2021-11-20 05:56:27,261 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 126 selfloop transitions, 44 changer transitions 3/297 dead transitions. [2021-11-20 05:56:27,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 297 transitions, 2404 flow [2021-11-20 05:56:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:56:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 05:56:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 883 transitions. [2021-11-20 05:56:27,264 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8919191919191919 [2021-11-20 05:56:27,264 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 883 transitions. [2021-11-20 05:56:27,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 883 transitions. [2021-11-20 05:56:27,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:27,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 883 transitions. [2021-11-20 05:56:27,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,312 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,312 INFO L186 Difference]: Start difference. First operand has 230 places, 259 transitions, 1794 flow. Second operand 6 states and 883 transitions. [2021-11-20 05:56:27,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 297 transitions, 2404 flow [2021-11-20 05:56:27,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 297 transitions, 2308 flow, removed 7 selfloop flow, removed 7 redundant places. [2021-11-20 05:56:27,357 INFO L242 Difference]: Finished difference. Result has 228 places, 264 transitions, 1902 flow [2021-11-20 05:56:27,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1902, PETRI_PLACES=228, PETRI_TRANSITIONS=264} [2021-11-20 05:56:27,359 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 80 predicate places. [2021-11-20 05:56:27,359 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 1902 flow [2021-11-20 05:56:27,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.33333333333334) internal successors, (836), 6 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,360 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:27,361 INFO L254 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] [2021-11-20 05:56:27,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 05:56:27,361 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1931931080, now seen corresponding path program 5 times [2021-11-20 05:56:27,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:27,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782265895] [2021-11-20 05:56:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:27,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:56:27,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:27,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782265895] [2021-11-20 05:56:27,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782265895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:27,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:27,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:56:27,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139272064] [2021-11-20 05:56:27,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:27,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:27,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:27,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2021-11-20 05:56:27,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 1902 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:27,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2021-11-20 05:56:27,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:27,794 INFO L129 PetriNetUnfolder]: 304/936 cut-off events. [2021-11-20 05:56:27,794 INFO L130 PetriNetUnfolder]: For 3754/3754 co-relation queries the response was YES. [2021-11-20 05:56:27,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3309 conditions, 936 events. 304/936 cut-off events. For 3754/3754 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5261 event pairs, 105 based on Foata normal form. 3/926 useless extension candidates. Maximal degree in co-relation 3205. Up to 340 conditions per place. [2021-11-20 05:56:27,813 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 116 selfloop transitions, 34 changer transitions 8/282 dead transitions. [2021-11-20 05:56:27,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 282 transitions, 2349 flow [2021-11-20 05:56:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:56:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-20 05:56:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 731 transitions. [2021-11-20 05:56:27,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8860606060606061 [2021-11-20 05:56:27,820 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 731 transitions. [2021-11-20 05:56:27,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 731 transitions. [2021-11-20 05:56:27,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:27,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 731 transitions. [2021-11-20 05:56:27,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,832 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,832 INFO L186 Difference]: Start difference. First operand has 228 places, 264 transitions, 1902 flow. Second operand 5 states and 731 transitions. [2021-11-20 05:56:27,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 282 transitions, 2349 flow [2021-11-20 05:56:27,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 282 transitions, 2282 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-20 05:56:27,873 INFO L242 Difference]: Finished difference. Result has 231 places, 262 transitions, 1867 flow [2021-11-20 05:56:27,874 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1867, PETRI_PLACES=231, PETRI_TRANSITIONS=262} [2021-11-20 05:56:27,875 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 83 predicate places. [2021-11-20 05:56:27,875 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 262 transitions, 1867 flow [2021-11-20 05:56:27,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,876 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:27,876 INFO L254 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] [2021-11-20 05:56:27,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 05:56:27,877 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:27,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1878094116, now seen corresponding path program 1 times [2021-11-20 05:56:27,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:27,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922695886] [2021-11-20 05:56:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:27,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:28,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922695886] [2021-11-20 05:56:28,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922695886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946244098] [2021-11-20 05:56:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:28,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:28,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:28,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:56:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:28,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:56:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:28,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2021-11-20 05:56:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:28,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:28,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2021-11-20 05:56:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:29,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946244098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:29,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:29,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2021-11-20 05:56:29,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964121805] [2021-11-20 05:56:29,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:29,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:56:29,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:29,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:56:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:56:29,386 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2021-11-20 05:56:29,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 262 transitions, 1867 flow. Second operand has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:29,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:29,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2021-11-20 05:56:29,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:30,753 INFO L129 PetriNetUnfolder]: 779/2818 cut-off events. [2021-11-20 05:56:30,754 INFO L130 PetriNetUnfolder]: For 9441/9639 co-relation queries the response was YES. [2021-11-20 05:56:30,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9052 conditions, 2818 events. 779/2818 cut-off events. For 9441/9639 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23922 event pairs, 94 based on Foata normal form. 46/2799 useless extension candidates. Maximal degree in co-relation 8693. Up to 474 conditions per place. [2021-11-20 05:56:30,806 INFO L132 encePairwiseOnDemand]: 144/165 looper letters, 100 selfloop transitions, 33 changer transitions 10/342 dead transitions. [2021-11-20 05:56:30,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 342 transitions, 2370 flow [2021-11-20 05:56:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:56:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-20 05:56:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2141 transitions. [2021-11-20 05:56:30,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5898071625344352 [2021-11-20 05:56:30,812 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2141 transitions. [2021-11-20 05:56:30,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2141 transitions. [2021-11-20 05:56:30,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:30,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2141 transitions. [2021-11-20 05:56:30,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.31818181818181) internal successors, (2141), 22 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:30,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:30,835 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:30,835 INFO L186 Difference]: Start difference. First operand has 231 places, 262 transitions, 1867 flow. Second operand 22 states and 2141 transitions. [2021-11-20 05:56:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 342 transitions, 2370 flow [2021-11-20 05:56:30,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 342 transitions, 2141 flow, removed 8 selfloop flow, removed 17 redundant places. [2021-11-20 05:56:30,924 INFO L242 Difference]: Finished difference. Result has 242 places, 283 transitions, 1858 flow [2021-11-20 05:56:30,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1858, PETRI_PLACES=242, PETRI_TRANSITIONS=283} [2021-11-20 05:56:30,926 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 94 predicate places. [2021-11-20 05:56:30,926 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 283 transitions, 1858 flow [2021-11-20 05:56:30,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:30,927 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:30,928 INFO L254 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] [2021-11-20 05:56:30,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:31,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 05:56:31,145 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1958640954, now seen corresponding path program 2 times [2021-11-20 05:56:31,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:31,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923868578] [2021-11-20 05:56:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:31,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:31,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:31,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923868578] [2021-11-20 05:56:31,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923868578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:31,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853580378] [2021-11-20 05:56:31,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:56:31,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:31,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:31,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:31,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:56:31,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:56:31,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:31,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 05:56:31,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:31,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2021-11-20 05:56:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:31,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:31,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2021-11-20 05:56:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:32,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853580378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:32,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:32,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 19 [2021-11-20 05:56:32,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547819425] [2021-11-20 05:56:32,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:32,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:56:32,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:56:32,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:56:32,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2021-11-20 05:56:32,306 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 283 transitions, 1858 flow. Second operand has 19 states, 19 states have (on average 95.42105263157895) internal successors, (1813), 19 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:32,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:32,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2021-11-20 05:56:32,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:34,956 INFO L129 PetriNetUnfolder]: 2065/7185 cut-off events. [2021-11-20 05:56:34,959 INFO L130 PetriNetUnfolder]: For 17801/18435 co-relation queries the response was YES. [2021-11-20 05:56:35,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23240 conditions, 7185 events. 2065/7185 cut-off events. For 17801/18435 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 74553 event pairs, 160 based on Foata normal form. 161/7229 useless extension candidates. Maximal degree in co-relation 23148. Up to 1105 conditions per place. [2021-11-20 05:56:35,102 INFO L132 encePairwiseOnDemand]: 147/165 looper letters, 103 selfloop transitions, 40 changer transitions 14/356 dead transitions. [2021-11-20 05:56:35,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 356 transitions, 2518 flow [2021-11-20 05:56:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:56:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-20 05:56:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1935 transitions. [2021-11-20 05:56:35,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2021-11-20 05:56:35,108 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1935 transitions. [2021-11-20 05:56:35,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1935 transitions. [2021-11-20 05:56:35,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:35,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1935 transitions. [2021-11-20 05:56:35,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.75) internal successors, (1935), 20 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:35,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:35,123 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:35,124 INFO L186 Difference]: Start difference. First operand has 242 places, 283 transitions, 1858 flow. Second operand 20 states and 1935 transitions. [2021-11-20 05:56:35,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 356 transitions, 2518 flow [2021-11-20 05:56:35,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 356 transitions, 2428 flow, removed 43 selfloop flow, removed 6 redundant places. [2021-11-20 05:56:35,404 INFO L242 Difference]: Finished difference. Result has 262 places, 306 transitions, 2113 flow [2021-11-20 05:56:35,405 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2113, PETRI_PLACES=262, PETRI_TRANSITIONS=306} [2021-11-20 05:56:35,405 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 114 predicate places. [2021-11-20 05:56:35,405 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 306 transitions, 2113 flow [2021-11-20 05:56:35,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.42105263157895) internal successors, (1813), 19 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:35,407 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:35,407 INFO L254 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] [2021-11-20 05:56:35,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:35,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:56:35,633 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash -630796493, now seen corresponding path program 3 times [2021-11-20 05:56:35,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:35,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954169021] [2021-11-20 05:56:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:35,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:36,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:36,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954169021] [2021-11-20 05:56:36,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954169021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:36,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619652291] [2021-11-20 05:56:36,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:56:36,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:36,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:36,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:36,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:56:36,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:56:36,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:36,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 05:56:36,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:37,795 INFO L388 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 15 treesize of output 11 [2021-11-20 05:56:38,288 INFO L388 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 17 treesize of output 13 [2021-11-20 05:56:38,584 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-11-20 05:56:38,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 48 [2021-11-20 05:56:38,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 05:56:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:38,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:43,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:56:43,286 INFO L388 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 16617 treesize of output 15438 [2021-11-20 05:56:43,776 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 05:56:43,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:56:43,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-20 05:56:43,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380135953] [2021-11-20 05:56:43,777 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:43,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:56:43,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:56:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1870, Unknown=1, NotChecked=0, Total=2070 [2021-11-20 05:56:43,783 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 165 [2021-11-20 05:56:43,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 306 transitions, 2113 flow. Second operand has 20 states, 20 states have (on average 75.8) internal successors, (1516), 20 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:43,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:43,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 165 [2021-11-20 05:56:43,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:47,049 INFO L129 PetriNetUnfolder]: 1871/6583 cut-off events. [2021-11-20 05:56:47,050 INFO L130 PetriNetUnfolder]: For 17966/18640 co-relation queries the response was YES. [2021-11-20 05:56:47,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21922 conditions, 6583 events. 1871/6583 cut-off events. For 17966/18640 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 68896 event pairs, 149 based on Foata normal form. 148/6608 useless extension candidates. Maximal degree in co-relation 21822. Up to 1199 conditions per place. [2021-11-20 05:56:47,186 INFO L132 encePairwiseOnDemand]: 144/165 looper letters, 117 selfloop transitions, 29 changer transitions 17/345 dead transitions. [2021-11-20 05:56:47,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 345 transitions, 2604 flow [2021-11-20 05:56:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:56:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-20 05:56:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1776 transitions. [2021-11-20 05:56:47,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4679841897233202 [2021-11-20 05:56:47,192 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1776 transitions. [2021-11-20 05:56:47,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1776 transitions. [2021-11-20 05:56:47,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:47,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1776 transitions. [2021-11-20 05:56:47,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 77.21739130434783) internal successors, (1776), 23 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,208 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,208 INFO L186 Difference]: Start difference. First operand has 262 places, 306 transitions, 2113 flow. Second operand 23 states and 1776 transitions. [2021-11-20 05:56:47,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 345 transitions, 2604 flow [2021-11-20 05:56:47,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 345 transitions, 2546 flow, removed 16 selfloop flow, removed 11 redundant places. [2021-11-20 05:56:47,427 INFO L242 Difference]: Finished difference. Result has 277 places, 311 transitions, 2155 flow [2021-11-20 05:56:47,427 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2155, PETRI_PLACES=277, PETRI_TRANSITIONS=311} [2021-11-20 05:56:47,428 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 129 predicate places. [2021-11-20 05:56:47,428 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 311 transitions, 2155 flow [2021-11-20 05:56:47,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 75.8) internal successors, (1516), 20 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:47,430 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-20 05:56:47,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:47,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:47,657 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:47,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:47,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1992574991, now seen corresponding path program 4 times [2021-11-20 05:56:47,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:47,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389915151] [2021-11-20 05:56:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:47,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:56:47,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:47,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389915151] [2021-11-20 05:56:47,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389915151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:47,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779724657] [2021-11-20 05:56:47,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:56:47,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:47,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:47,783 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:47,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:56:47,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:56:47,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:47,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:56:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:56:48,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:56:48,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779724657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:48,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:48,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-11-20 05:56:48,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670177279] [2021-11-20 05:56:48,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:48,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:56:48,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:56:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:56:48,751 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-11-20 05:56:48,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 311 transitions, 2155 flow. Second operand has 19 states, 19 states have (on average 137.73684210526315) internal successors, (2617), 19 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:48,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:48,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-11-20 05:56:48,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:51,929 INFO L129 PetriNetUnfolder]: 3502/9663 cut-off events. [2021-11-20 05:56:51,929 INFO L130 PetriNetUnfolder]: For 24778/24792 co-relation queries the response was YES. [2021-11-20 05:56:52,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33706 conditions, 9663 events. 3502/9663 cut-off events. For 24778/24792 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 93842 event pairs, 802 based on Foata normal form. 104/9716 useless extension candidates. Maximal degree in co-relation 33563. Up to 2414 conditions per place. [2021-11-20 05:56:52,077 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 380 selfloop transitions, 151 changer transitions 4/679 dead transitions. [2021-11-20 05:56:52,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 679 transitions, 5862 flow [2021-11-20 05:56:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 05:56:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-20 05:56:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5344 transitions. [2021-11-20 05:56:52,089 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8523125996810207 [2021-11-20 05:56:52,089 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5344 transitions. [2021-11-20 05:56:52,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5344 transitions. [2021-11-20 05:56:52,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:52,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5344 transitions. [2021-11-20 05:56:52,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 140.6315789473684) internal successors, (5344), 38 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:52,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 165.0) internal successors, (6435), 39 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:52,121 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 165.0) internal successors, (6435), 39 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:52,122 INFO L186 Difference]: Start difference. First operand has 277 places, 311 transitions, 2155 flow. Second operand 38 states and 5344 transitions. [2021-11-20 05:56:52,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 679 transitions, 5862 flow [2021-11-20 05:56:52,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 679 transitions, 5698 flow, removed 45 selfloop flow, removed 14 redundant places. [2021-11-20 05:56:52,400 INFO L242 Difference]: Finished difference. Result has 323 places, 414 transitions, 3359 flow [2021-11-20 05:56:52,401 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3359, PETRI_PLACES=323, PETRI_TRANSITIONS=414} [2021-11-20 05:56:52,402 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 175 predicate places. [2021-11-20 05:56:52,402 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 414 transitions, 3359 flow [2021-11-20 05:56:52,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.73684210526315) internal successors, (2617), 19 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:52,403 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:56:52,404 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-20 05:56:52,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:52,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:56:52,629 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:56:52,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:52,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1686250609, now seen corresponding path program 5 times [2021-11-20 05:56:52,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:52,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220313897] [2021-11-20 05:56:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:52,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:56:52,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:52,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220313897] [2021-11-20 05:56:52,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220313897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:52,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268656001] [2021-11-20 05:56:52,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:56:52,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:52,782 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:52,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:56:52,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-20 05:56:52,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:52,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:56:52,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:56:53,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:56:53,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268656001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:53,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:53,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-11-20 05:56:53,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588129222] [2021-11-20 05:56:53,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:53,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:56:53,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:56:53,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:56:53,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-11-20 05:56:53,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 414 transitions, 3359 flow. Second operand has 19 states, 19 states have (on average 137.73684210526315) internal successors, (2617), 19 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:53,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:56:53,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-11-20 05:56:53,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:56:59,312 INFO L129 PetriNetUnfolder]: 5137/13859 cut-off events. [2021-11-20 05:56:59,312 INFO L130 PetriNetUnfolder]: For 84390/84397 co-relation queries the response was YES. [2021-11-20 05:56:59,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66624 conditions, 13859 events. 5137/13859 cut-off events. For 84390/84397 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 141874 event pairs, 742 based on Foata normal form. 84/13870 useless extension candidates. Maximal degree in co-relation 66041. Up to 2714 conditions per place. [2021-11-20 05:56:59,723 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 537 selfloop transitions, 293 changer transitions 2/976 dead transitions. [2021-11-20 05:56:59,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 976 transitions, 9968 flow [2021-11-20 05:56:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 05:56:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-11-20 05:56:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7023 transitions. [2021-11-20 05:56:59,734 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8512727272727273 [2021-11-20 05:56:59,734 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7023 transitions. [2021-11-20 05:56:59,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7023 transitions. [2021-11-20 05:56:59,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:56:59,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7023 transitions. [2021-11-20 05:56:59,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 140.46) internal successors, (7023), 50 states have internal predecessors, (7023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:59,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:59,774 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:59,775 INFO L186 Difference]: Start difference. First operand has 323 places, 414 transitions, 3359 flow. Second operand 50 states and 7023 transitions. [2021-11-20 05:56:59,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 976 transitions, 9968 flow [2021-11-20 05:57:00,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 976 transitions, 9916 flow, removed 16 selfloop flow, removed 3 redundant places. [2021-11-20 05:57:00,552 INFO L242 Difference]: Finished difference. Result has 384 places, 597 transitions, 6200 flow [2021-11-20 05:57:00,553 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=6200, PETRI_PLACES=384, PETRI_TRANSITIONS=597} [2021-11-20 05:57:00,553 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 236 predicate places. [2021-11-20 05:57:00,554 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 597 transitions, 6200 flow [2021-11-20 05:57:00,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.73684210526315) internal successors, (2617), 19 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:00,554 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:57:00,555 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-20 05:57:00,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 05:57:00,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:00,781 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:57:00,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1409769055, now seen corresponding path program 6 times [2021-11-20 05:57:00,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:00,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717436455] [2021-11-20 05:57:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:00,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:00,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:00,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717436455] [2021-11-20 05:57:00,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717436455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:00,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045792419] [2021-11-20 05:57:00,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:57:00,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:00,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:00,913 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:00,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:57:01,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-20 05:57:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:57:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:57:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:01,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:01,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045792419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:57:01,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:57:01,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-11-20 05:57:01,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444642499] [2021-11-20 05:57:01,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:57:01,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:57:01,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:57:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:57:01,827 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-11-20 05:57:01,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 597 transitions, 6200 flow. Second operand has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:01,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:57:01,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-11-20 05:57:01,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:57:10,299 INFO L129 PetriNetUnfolder]: 7165/19537 cut-off events. [2021-11-20 05:57:10,299 INFO L130 PetriNetUnfolder]: For 186091/186098 co-relation queries the response was YES. [2021-11-20 05:57:10,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109758 conditions, 19537 events. 7165/19537 cut-off events. For 186091/186098 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 213920 event pairs, 1169 based on Foata normal form. 60/19471 useless extension candidates. Maximal degree in co-relation 105523. Up to 8193 conditions per place. [2021-11-20 05:57:10,801 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 701 selfloop transitions, 272 changer transitions 18/1135 dead transitions. [2021-11-20 05:57:10,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1135 transitions, 13720 flow [2021-11-20 05:57:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 05:57:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-20 05:57:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5342 transitions. [2021-11-20 05:57:10,813 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8519936204146731 [2021-11-20 05:57:10,813 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5342 transitions. [2021-11-20 05:57:10,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5342 transitions. [2021-11-20 05:57:10,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:57:10,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5342 transitions. [2021-11-20 05:57:10,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 140.57894736842104) internal successors, (5342), 38 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:10,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 165.0) internal successors, (6435), 39 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:10,850 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 165.0) internal successors, (6435), 39 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:10,850 INFO L186 Difference]: Start difference. First operand has 384 places, 597 transitions, 6200 flow. Second operand 38 states and 5342 transitions. [2021-11-20 05:57:10,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1135 transitions, 13720 flow [2021-11-20 05:57:14,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1135 transitions, 12421 flow, removed 589 selfloop flow, removed 9 redundant places. [2021-11-20 05:57:14,124 INFO L242 Difference]: Finished difference. Result has 434 places, 772 transitions, 8625 flow [2021-11-20 05:57:14,125 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8625, PETRI_PLACES=434, PETRI_TRANSITIONS=772} [2021-11-20 05:57:14,125 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 286 predicate places. [2021-11-20 05:57:14,126 INFO L470 AbstractCegarLoop]: Abstraction has has 434 places, 772 transitions, 8625 flow [2021-11-20 05:57:14,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:14,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:57:14,127 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-20 05:57:14,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:57:14,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:14,337 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:57:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1900229821, now seen corresponding path program 7 times [2021-11-20 05:57:14,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:14,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176561454] [2021-11-20 05:57:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:14,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:14,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176561454] [2021-11-20 05:57:14,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176561454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947396237] [2021-11-20 05:57:14,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:57:14,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:14,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:14,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:57:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:14,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:57:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:14,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:15,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947396237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:57:15,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:57:15,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-11-20 05:57:15,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369514063] [2021-11-20 05:57:15,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:57:15,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:57:15,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:15,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:57:15,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:57:15,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-11-20 05:57:15,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 772 transitions, 8625 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:15,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:57:15,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-11-20 05:57:15,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:57:22,795 INFO L129 PetriNetUnfolder]: 7139/19533 cut-off events. [2021-11-20 05:57:22,795 INFO L130 PetriNetUnfolder]: For 167110/167117 co-relation queries the response was YES. [2021-11-20 05:57:23,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106181 conditions, 19533 events. 7139/19533 cut-off events. For 167110/167117 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 214074 event pairs, 1235 based on Foata normal form. 34/19462 useless extension candidates. Maximal degree in co-relation 104775. Up to 8119 conditions per place. [2021-11-20 05:57:23,276 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 659 selfloop transitions, 266 changer transitions 10/1079 dead transitions. [2021-11-20 05:57:23,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1079 transitions, 13274 flow [2021-11-20 05:57:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 05:57:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-20 05:57:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4928 transitions. [2021-11-20 05:57:23,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8533333333333334 [2021-11-20 05:57:23,285 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4928 transitions. [2021-11-20 05:57:23,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4928 transitions. [2021-11-20 05:57:23,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:57:23,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4928 transitions. [2021-11-20 05:57:23,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:23,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 165.0) internal successors, (5940), 36 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:23,312 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 165.0) internal successors, (5940), 36 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:23,312 INFO L186 Difference]: Start difference. First operand has 434 places, 772 transitions, 8625 flow. Second operand 35 states and 4928 transitions. [2021-11-20 05:57:23,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1079 transitions, 13274 flow [2021-11-20 05:57:27,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1079 transitions, 12795 flow, removed 187 selfloop flow, removed 4 redundant places. [2021-11-20 05:57:27,691 INFO L242 Difference]: Finished difference. Result has 467 places, 792 transitions, 9258 flow [2021-11-20 05:57:27,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=8256, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9258, PETRI_PLACES=467, PETRI_TRANSITIONS=792} [2021-11-20 05:57:27,693 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 319 predicate places. [2021-11-20 05:57:27,693 INFO L470 AbstractCegarLoop]: Abstraction has has 467 places, 792 transitions, 9258 flow [2021-11-20 05:57:27,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:27,694 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:57:27,694 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-20 05:57:27,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:57:27,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 05:57:27,911 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:57:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1160775897, now seen corresponding path program 8 times [2021-11-20 05:57:27,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:27,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238722071] [2021-11-20 05:57:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:27,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:28,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:28,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238722071] [2021-11-20 05:57:28,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238722071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:28,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752524904] [2021-11-20 05:57:28,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:57:28,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:28,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:28,009 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:28,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:57:28,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:57:28,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:57:28,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:57:28,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:28,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:28,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752524904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:57:28,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:57:28,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-11-20 05:57:28,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338874883] [2021-11-20 05:57:28,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:57:28,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:57:28,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:28,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:57:28,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:57:28,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-11-20 05:57:28,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 792 transitions, 9258 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:28,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:57:28,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-11-20 05:57:28,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:57:39,993 INFO L129 PetriNetUnfolder]: 9541/25621 cut-off events. [2021-11-20 05:57:39,994 INFO L130 PetriNetUnfolder]: For 235266/235273 co-relation queries the response was YES. [2021-11-20 05:57:40,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145603 conditions, 25621 events. 9541/25621 cut-off events. For 235266/235273 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 290893 event pairs, 1435 based on Foata normal form. 34/25528 useless extension candidates. Maximal degree in co-relation 144276. Up to 9948 conditions per place. [2021-11-20 05:57:40,700 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 740 selfloop transitions, 455 changer transitions 14/1353 dead transitions. [2021-11-20 05:57:40,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1353 transitions, 17825 flow [2021-11-20 05:57:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 05:57:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-20 05:57:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6155 transitions. [2021-11-20 05:57:40,710 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8477961432506887 [2021-11-20 05:57:40,711 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6155 transitions. [2021-11-20 05:57:40,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6155 transitions. [2021-11-20 05:57:40,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:57:40,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6155 transitions. [2021-11-20 05:57:40,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 139.88636363636363) internal successors, (6155), 44 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:40,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 165.0) internal successors, (7425), 45 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:40,737 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 165.0) internal successors, (7425), 45 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:40,738 INFO L186 Difference]: Start difference. First operand has 467 places, 792 transitions, 9258 flow. Second operand 44 states and 6155 transitions. [2021-11-20 05:57:40,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1353 transitions, 17825 flow [2021-11-20 05:57:48,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1353 transitions, 17226 flow, removed 91 selfloop flow, removed 23 redundant places. [2021-11-20 05:57:48,294 INFO L242 Difference]: Finished difference. Result has 504 places, 1034 transitions, 13772 flow [2021-11-20 05:57:48,295 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=8842, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13772, PETRI_PLACES=504, PETRI_TRANSITIONS=1034} [2021-11-20 05:57:48,296 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 356 predicate places. [2021-11-20 05:57:48,296 INFO L470 AbstractCegarLoop]: Abstraction has has 504 places, 1034 transitions, 13772 flow [2021-11-20 05:57:48,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:48,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:57:48,297 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-20 05:57:48,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:57:48,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 05:57:48,501 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:57:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:48,502 INFO L85 PathProgramCache]: Analyzing trace with hash -489740803, now seen corresponding path program 9 times [2021-11-20 05:57:48,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:48,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033663511] [2021-11-20 05:57:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:48,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:48,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:48,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033663511] [2021-11-20 05:57:48,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033663511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:48,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588298958] [2021-11-20 05:57:48,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:57:48,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:48,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:48,605 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:48,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:57:48,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:57:48,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:57:48,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:57:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:49,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:57:49,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588298958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:57:49,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:57:49,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-11-20 05:57:49,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375256565] [2021-11-20 05:57:49,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:57:49,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:57:49,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:49,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:57:49,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:57:49,291 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-11-20 05:57:49,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 1034 transitions, 13772 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:49,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:57:49,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-11-20 05:57:49,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:58:04,048 INFO L129 PetriNetUnfolder]: 9537/25926 cut-off events. [2021-11-20 05:58:04,048 INFO L130 PetriNetUnfolder]: For 278668/278675 co-relation queries the response was YES. [2021-11-20 05:58:04,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157029 conditions, 25926 events. 9537/25926 cut-off events. For 278668/278675 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 296706 event pairs, 921 based on Foata normal form. 34/25890 useless extension candidates. Maximal degree in co-relation 155696. Up to 5407 conditions per place. [2021-11-20 05:58:04,870 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 662 selfloop transitions, 616 changer transitions 12/1434 dead transitions. [2021-11-20 05:58:04,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1434 transitions, 20005 flow [2021-11-20 05:58:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 05:58:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-20 05:58:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 6734 transitions. [2021-11-20 05:58:04,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8502525252525253 [2021-11-20 05:58:04,880 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 6734 transitions. [2021-11-20 05:58:04,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 6734 transitions. [2021-11-20 05:58:04,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:58:04,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 6734 transitions. [2021-11-20 05:58:04,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 140.29166666666666) internal successors, (6734), 48 states have internal predecessors, (6734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:04,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 165.0) internal successors, (8085), 49 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:04,910 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 165.0) internal successors, (8085), 49 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:04,910 INFO L186 Difference]: Start difference. First operand has 504 places, 1034 transitions, 13772 flow. Second operand 48 states and 6734 transitions. [2021-11-20 05:58:04,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1434 transitions, 20005 flow [2021-11-20 05:58:17,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1434 transitions, 19631 flow, removed 139 selfloop flow, removed 10 redundant places. [2021-11-20 05:58:17,236 INFO L242 Difference]: Finished difference. Result has 547 places, 1076 transitions, 15593 flow [2021-11-20 05:58:17,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=13408, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=15593, PETRI_PLACES=547, PETRI_TRANSITIONS=1076} [2021-11-20 05:58:17,238 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 399 predicate places. [2021-11-20 05:58:17,238 INFO L470 AbstractCegarLoop]: Abstraction has has 547 places, 1076 transitions, 15593 flow [2021-11-20 05:58:17,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:17,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:58:17,239 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-20 05:58:17,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-20 05:58:17,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:17,453 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:58:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1531537211, now seen corresponding path program 10 times [2021-11-20 05:58:17,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:58:17,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881783887] [2021-11-20 05:58:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:17,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:58:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:58:17,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:58:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881783887] [2021-11-20 05:58:17,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881783887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:58:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091943114] [2021-11-20 05:58:17,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:58:17,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:17,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:17,561 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:58:17,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c833c9cf-a610-4c03-aba8-32b251d23b23/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:58:17,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:58:17,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:58:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:58:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:58:18,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:58:18,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091943114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:58:18,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:58:18,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-11-20 05:58:18,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215208451] [2021-11-20 05:58:18,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:18,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 05:58:18,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:18,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 05:58:18,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:58:18,390 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2021-11-20 05:58:18,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1076 transitions, 15593 flow. Second operand has 21 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:18,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:58:18,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2021-11-20 05:58:18,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand