./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.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_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/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_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/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_0daae7e2-ec30-4356-b5be-b8ef5a662a71/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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:28:52,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:28:52,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:28:52,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:28:52,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:28:52,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:28:52,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:28:52,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:28:52,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:28:52,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:28:52,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:28:52,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:28:52,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:28:52,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:28:52,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:28:52,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:28:52,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:28:52,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:28:52,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:28:52,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:28:52,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:28:52,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:28:52,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:28:52,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:28:52,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:28:52,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:28:52,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:28:52,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:28:52,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:28:52,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:28:52,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:28:52,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:28:52,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:28:52,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:28:52,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:28:52,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:28:52,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:28:52,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:28:52,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:28:52,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:28:52,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:28:52,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:28:52,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:28:52,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:28:52,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:28:52,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:28:52,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:28:52,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:28:52,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:28:52,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:28:52,802 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:28:52,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:28:52,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:28:52,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:28:52,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:28:52,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:28:52,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:28:52,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:28:52,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:28:52,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:28:52,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:28:52,805 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:28:52,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:28:52,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:28:52,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:28:52,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:28:52,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:28:52,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:28:52,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:28:52,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:28:52,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:28:52,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:28:52,811 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:28:52,811 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:28:52,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:28:52,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:28:52,812 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_0daae7e2-ec30-4356-b5be-b8ef5a662a71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2021-11-20 06:28:53,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:28:53,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:28:53,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:28:53,081 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:28:53,081 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:28:53,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2021-11-20 06:28:53,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/data/4a9c811e1/0e32da128f494b5eaf26b6225aa15502/FLAGa3f414d28 [2021-11-20 06:28:53,687 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:28:53,688 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2021-11-20 06:28:53,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/data/4a9c811e1/0e32da128f494b5eaf26b6225aa15502/FLAGa3f414d28 [2021-11-20 06:28:54,058 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/data/4a9c811e1/0e32da128f494b5eaf26b6225aa15502 [2021-11-20 06:28:54,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:28:54,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:28:54,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:28:54,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:28:54,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:28:54,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a23a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54, skipping insertion in model container [2021-11-20 06:28:54,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:28:54,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:28:54,387 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_0daae7e2-ec30-4356-b5be-b8ef5a662a71/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2021-11-20 06:28:54,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:28:54,400 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:28:54,426 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_0daae7e2-ec30-4356-b5be-b8ef5a662a71/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2021-11-20 06:28:54,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:28:54,442 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:28:54,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54 WrapperNode [2021-11-20 06:28:54,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:28:54,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:28:54,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:28:54,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:28:54,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,493 INFO L137 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2021-11-20 06:28:54,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:28:54,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:28:54,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:28:54,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:28:54,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:28:54,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:28:54,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:28:54,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:28:54,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (1/1) ... [2021-11-20 06:28:54,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:28:54,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:54,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:28:54,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:28:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:28:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 06:28:54,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 06:28:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 06:28:54,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 06:28:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:28:54,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:28:54,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:28:54,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-20 06:28:54,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-20 06:28:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:28:54,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:28:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:28:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:28:54,662 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 06:28:54,809 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:28:54,811 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:28:55,108 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:28:55,155 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:28:55,155 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 06:28:55,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:28:55 BoogieIcfgContainer [2021-11-20 06:28:55,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:28:55,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:28:55,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:28:55,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:28:55,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:28:54" (1/3) ... [2021-11-20 06:28:55,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4174a08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:28:55, skipping insertion in model container [2021-11-20 06:28:55,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:54" (2/3) ... [2021-11-20 06:28:55,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4174a08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:28:55, skipping insertion in model container [2021-11-20 06:28:55,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:28:55" (3/3) ... [2021-11-20 06:28:55,168 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2021-11-20 06:28:55,174 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 06:28:55,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:28:55,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:28:55,175 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 06:28:55,211 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,212 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,212 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,213 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,214 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,215 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,215 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,216 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,216 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,216 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,217 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,217 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,217 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,217 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,218 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,218 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,219 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,220 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,220 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,222 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,225 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,225 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,227 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,227 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,227 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,228 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,229 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,229 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,229 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,230 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,230 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,230 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,231 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,232 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,233 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,233 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,236 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,237 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,237 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,239 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,239 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,239 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,239 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,240 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:28:55,243 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 06:28:55,295 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:28:55,309 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 06:28:55,310 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 06:28:55,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2021-11-20 06:28:55,369 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2021-11-20 06:28:55,370 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:28:55,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-11-20 06:28:55,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2021-11-20 06:28:55,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2021-11-20 06:28:55,404 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2021-11-20 06:28:55,404 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:28:55,404 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:28:55,405 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] [2021-11-20 06:28:55,406 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:28:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash -566801703, now seen corresponding path program 1 times [2021-11-20 06:28:55,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:55,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603752719] [2021-11-20 06:28:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:55,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:55,810 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 06:28:55,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:55,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603752719] [2021-11-20 06:28:55,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603752719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:55,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:55,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:28:55,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300338268] [2021-11-20 06:28:55,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:55,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:28:55,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:55,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:28:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:28:55,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2021-11-20 06:28:55,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 06:28:55,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:28:55,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2021-11-20 06:28:55,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:28:55,994 INFO L129 PetriNetUnfolder]: 16/112 cut-off events. [2021-11-20 06:28:56,002 INFO L130 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2021-11-20 06:28:56,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 175 event pairs, 5 based on Foata normal form. 14/114 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2021-11-20 06:28:56,009 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2021-11-20 06:28:56,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2021-11-20 06:28:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:28:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:28:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2021-11-20 06:28:56,030 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2021-11-20 06:28:56,031 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2021-11-20 06:28:56,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2021-11-20 06:28:56,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:28:56,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2021-11-20 06:28:56,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 06:28:56,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 06:28:56,063 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 06:28:56,065 INFO L186 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2021-11-20 06:28:56,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2021-11-20 06:28:56,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 06:28:56,085 INFO L242 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2021-11-20 06:28:56,088 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2021-11-20 06:28:56,094 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2021-11-20 06:28:56,094 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2021-11-20 06:28:56,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 06:28:56,095 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:28:56,096 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] [2021-11-20 06:28:56,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:28:56,098 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:28:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash 693036951, now seen corresponding path program 1 times [2021-11-20 06:28:56,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:56,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485176138] [2021-11-20 06:28:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:56,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:56,659 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 06:28:56,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:56,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485176138] [2021-11-20 06:28:56,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485176138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:56,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:56,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:28:56,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613454133] [2021-11-20 06:28:56,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:56,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:28:56,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:28:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:28:56,666 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2021-11-20 06:28:56,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 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 06:28:56,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:28:56,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2021-11-20 06:28:56,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:28:56,896 INFO L129 PetriNetUnfolder]: 48/176 cut-off events. [2021-11-20 06:28:56,897 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-11-20 06:28:56,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 176 events. 48/176 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 503 event pairs, 5 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 295. Up to 72 conditions per place. [2021-11-20 06:28:56,917 INFO L132 encePairwiseOnDemand]: 80/88 looper letters, 36 selfloop transitions, 8 changer transitions 0/88 dead transitions. [2021-11-20 06:28:56,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 271 flow [2021-11-20 06:28:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:28:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 06:28:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 424 transitions. [2021-11-20 06:28:56,926 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6883116883116883 [2021-11-20 06:28:56,932 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 424 transitions. [2021-11-20 06:28:56,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 424 transitions. [2021-11-20 06:28:56,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:28:56,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 424 transitions. [2021-11-20 06:28:56,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.57142857142857) internal successors, (424), 7 states have internal predecessors, (424), 0 states have call successors, (0), 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 06:28:56,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 06:28:56,939 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 06:28:56,940 INFO L186 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 7 states and 424 transitions. [2021-11-20 06:28:56,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 271 flow [2021-11-20 06:28:56,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:28:56,944 INFO L242 Difference]: Finished difference. Result has 82 places, 76 transitions, 195 flow [2021-11-20 06:28:56,944 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=195, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2021-11-20 06:28:56,945 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2021-11-20 06:28:56,946 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 195 flow [2021-11-20 06:28:56,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 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 06:28:56,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:28:56,947 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] [2021-11-20 06:28:56,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:28:56,947 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:28:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash -248035196, now seen corresponding path program 1 times [2021-11-20 06:28:56,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:56,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231500787] [2021-11-20 06:28:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:56,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:57,308 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 06:28:57,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:57,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231500787] [2021-11-20 06:28:57,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231500787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:57,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035113936] [2021-11-20 06:28:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:57,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:57,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:57,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:57,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:28:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:57,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:28:57,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:58,174 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 06:28:58,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:58,921 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 06:28:58,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035113936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:58,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:28:58,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 19 [2021-11-20 06:28:58,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38484606] [2021-11-20 06:28:58,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:58,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:28:58,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:28:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:28:58,934 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2021-11-20 06:28:58,937 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 195 flow. Second operand has 19 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 0 states have call successors, (0), 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 06:28:58,937 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:28:58,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2021-11-20 06:28:58,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:28:59,853 INFO L129 PetriNetUnfolder]: 93/323 cut-off events. [2021-11-20 06:28:59,854 INFO L130 PetriNetUnfolder]: For 118/121 co-relation queries the response was YES. [2021-11-20 06:28:59,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 323 events. 93/323 cut-off events. For 118/121 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1273 event pairs, 8 based on Foata normal form. 16/321 useless extension candidates. Maximal degree in co-relation 674. Up to 53 conditions per place. [2021-11-20 06:28:59,859 INFO L132 encePairwiseOnDemand]: 76/88 looper letters, 54 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2021-11-20 06:28:59,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 564 flow [2021-11-20 06:28:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:28:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 06:28:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1118 transitions. [2021-11-20 06:28:59,866 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6686602870813397 [2021-11-20 06:28:59,866 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1118 transitions. [2021-11-20 06:28:59,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1118 transitions. [2021-11-20 06:28:59,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:28:59,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1118 transitions. [2021-11-20 06:28:59,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 0 states have call successors, (0), 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 06:28:59,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 88.0) internal successors, (1760), 20 states have internal predecessors, (1760), 0 states have call successors, (0), 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 06:28:59,878 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 88.0) internal successors, (1760), 20 states have internal predecessors, (1760), 0 states have call successors, (0), 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 06:28:59,878 INFO L186 Difference]: Start difference. First operand has 82 places, 76 transitions, 195 flow. Second operand 19 states and 1118 transitions. [2021-11-20 06:28:59,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 564 flow [2021-11-20 06:28:59,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 553 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-11-20 06:28:59,885 INFO L242 Difference]: Finished difference. Result has 107 places, 110 transitions, 478 flow [2021-11-20 06:28:59,885 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=478, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2021-11-20 06:28:59,886 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 29 predicate places. [2021-11-20 06:28:59,886 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 478 flow [2021-11-20 06:28:59,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 0 states have call successors, (0), 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 06:28:59,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:28:59,887 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] [2021-11-20 06:28:59,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:00,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:00,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:29:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:00,106 INFO L85 PathProgramCache]: Analyzing trace with hash -6394160, now seen corresponding path program 1 times [2021-11-20 06:29:00,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:00,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148351309] [2021-11-20 06:29:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:00,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,694 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 06:29:00,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:00,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148351309] [2021-11-20 06:29:00,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148351309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:00,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25312531] [2021-11-20 06:29:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:00,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:00,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:00,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:00,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:29:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:29:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:02,174 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 06:29:02,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:03,807 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 06:29:03,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25312531] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:03,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:29:03,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2021-11-20 06:29:03,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916001726] [2021-11-20 06:29:03,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:03,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:29:03,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:03,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:29:03,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:29:03,814 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-11-20 06:29:03,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 478 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 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 06:29:03,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:29:03,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-11-20 06:29:03,816 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:29:05,895 INFO L129 PetriNetUnfolder]: 314/950 cut-off events. [2021-11-20 06:29:05,896 INFO L130 PetriNetUnfolder]: For 1542/1542 co-relation queries the response was YES. [2021-11-20 06:29:05,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 950 events. 314/950 cut-off events. For 1542/1542 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5767 event pairs, 36 based on Foata normal form. 2/880 useless extension candidates. Maximal degree in co-relation 2727. Up to 156 conditions per place. [2021-11-20 06:29:05,904 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 122 selfloop transitions, 103 changer transitions 18/282 dead transitions. [2021-11-20 06:29:05,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 282 transitions, 1896 flow [2021-11-20 06:29:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:29:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-20 06:29:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1525 transitions. [2021-11-20 06:29:05,913 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6189123376623377 [2021-11-20 06:29:05,917 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1525 transitions. [2021-11-20 06:29:05,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1525 transitions. [2021-11-20 06:29:05,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:29:05,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1525 transitions. [2021-11-20 06:29:05,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.464285714285715) internal successors, (1525), 28 states have internal predecessors, (1525), 0 states have call successors, (0), 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 06:29:05,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 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 06:29:05,938 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 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 06:29:05,938 INFO L186 Difference]: Start difference. First operand has 107 places, 110 transitions, 478 flow. Second operand 28 states and 1525 transitions. [2021-11-20 06:29:05,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 282 transitions, 1896 flow [2021-11-20 06:29:05,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 282 transitions, 1787 flow, removed 48 selfloop flow, removed 5 redundant places. [2021-11-20 06:29:05,968 INFO L242 Difference]: Finished difference. Result has 140 places, 193 transitions, 1333 flow [2021-11-20 06:29:05,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1333, PETRI_PLACES=140, PETRI_TRANSITIONS=193} [2021-11-20 06:29:05,971 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 62 predicate places. [2021-11-20 06:29:05,972 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 193 transitions, 1333 flow [2021-11-20 06:29:05,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 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 06:29:05,973 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:29:05,973 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] [2021-11-20 06:29:06,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:06,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:06,188 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:29:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1580700883, now seen corresponding path program 1 times [2021-11-20 06:29:06,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:06,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29961658] [2021-11-20 06:29:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:06,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:07,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:07,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29961658] [2021-11-20 06:29:07,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29961658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:07,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506117439] [2021-11-20 06:29:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:07,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:07,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:07,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:07,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:29:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:29:07,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:08,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:14,183 WARN L838 $PredicateComparison]: unable to prove that (forall ((aux_div_aux_mod_~s~0_27_101 Int) (aux_div_aux_mod_aux_mod_~s~0_27_101_122 Int) (aux_mod_aux_mod_aux_mod_~s~0_27_101_122 Int) (aux_div_~s~0_27 Int)) (let ((.cse0 (* 4294967296 aux_div_aux_mod_aux_mod_~s~0_27_101_122))) (let ((.cse2 (+ .cse0 aux_mod_aux_mod_aux_mod_~s~0_27_101_122 (* 4294967296 aux_div_~s~0_27))) (.cse1 (* 4294967296 aux_div_aux_mod_~s~0_27_101))) (or (<= (+ .cse0 c_~m~0 4294967297 aux_mod_aux_mod_aux_mod_~s~0_27_101_122) .cse1) (< .cse2 4294967295) (< 4294967295 .cse2) (< aux_mod_aux_mod_aux_mod_~s~0_27_101_122 0) (<= 4294967296 aux_mod_aux_mod_aux_mod_~s~0_27_101_122) (< .cse1 (+ .cse0 c_~m~0 aux_mod_aux_mod_aux_mod_~s~0_27_101_122 1)) (<= aux_div_aux_mod_~s~0_27_101 (+ aux_div_aux_mod_aux_mod_~s~0_27_101_122 (div c_~m~0 4294967296) 1)))))) is different from false [2021-11-20 06:29:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:14,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506117439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:14,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:14,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 37 [2021-11-20 06:29:14,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346640291] [2021-11-20 06:29:14,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:14,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:29:14,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:29:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1032, Unknown=1, NotChecked=68, Total=1332 [2021-11-20 06:29:14,344 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2021-11-20 06:29:14,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 193 transitions, 1333 flow. Second operand has 37 states, 37 states have (on average 52.91891891891892) internal successors, (1958), 37 states have internal predecessors, (1958), 0 states have call successors, (0), 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 06:29:14,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:29:14,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2021-11-20 06:29:14,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:29:31,100 INFO L129 PetriNetUnfolder]: 583/2036 cut-off events. [2021-11-20 06:29:31,100 INFO L130 PetriNetUnfolder]: For 6761/6798 co-relation queries the response was YES. [2021-11-20 06:29:31,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7005 conditions, 2036 events. 583/2036 cut-off events. For 6761/6798 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16697 event pairs, 17 based on Foata normal form. 35/2063 useless extension candidates. Maximal degree in co-relation 6977. Up to 288 conditions per place. [2021-11-20 06:29:31,126 INFO L132 encePairwiseOnDemand]: 70/88 looper letters, 265 selfloop transitions, 260 changer transitions 124/697 dead transitions. [2021-11-20 06:29:31,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 697 transitions, 6382 flow [2021-11-20 06:29:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-20 06:29:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-11-20 06:29:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 5506 transitions. [2021-11-20 06:29:31,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6256818181818182 [2021-11-20 06:29:31,145 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 5506 transitions. [2021-11-20 06:29:31,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 5506 transitions. [2021-11-20 06:29:31,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:29:31,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 5506 transitions. [2021-11-20 06:29:31,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 55.06) internal successors, (5506), 100 states have internal predecessors, (5506), 0 states have call successors, (0), 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 06:29:31,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 88.0) internal successors, (8888), 101 states have internal predecessors, (8888), 0 states have call successors, (0), 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 06:29:31,192 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 88.0) internal successors, (8888), 101 states have internal predecessors, (8888), 0 states have call successors, (0), 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 06:29:31,192 INFO L186 Difference]: Start difference. First operand has 140 places, 193 transitions, 1333 flow. Second operand 100 states and 5506 transitions. [2021-11-20 06:29:31,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 697 transitions, 6382 flow [2021-11-20 06:29:31,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 697 transitions, 5778 flow, removed 296 selfloop flow, removed 9 redundant places. [2021-11-20 06:29:31,251 INFO L242 Difference]: Finished difference. Result has 284 places, 398 transitions, 4045 flow [2021-11-20 06:29:31,251 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=4045, PETRI_PLACES=284, PETRI_TRANSITIONS=398} [2021-11-20 06:29:31,252 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 206 predicate places. [2021-11-20 06:29:31,252 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 398 transitions, 4045 flow [2021-11-20 06:29:31,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.91891891891892) internal successors, (1958), 37 states have internal predecessors, (1958), 0 states have call successors, (0), 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 06:29:31,254 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:29:31,254 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:31,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 06:29:31,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:31,465 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:29:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:31,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1966106357, now seen corresponding path program 2 times [2021-11-20 06:29:31,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:31,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048404388] [2021-11-20 06:29:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:31,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:31,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:31,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048404388] [2021-11-20 06:29:31,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048404388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:31,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:31,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:29:31,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513229807] [2021-11-20 06:29:31,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:31,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:29:31,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:29:31,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:29:31,576 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2021-11-20 06:29:31,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 398 transitions, 4045 flow. Second operand has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 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 06:29:31,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:29:31,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2021-11-20 06:29:31,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:29:32,565 INFO L129 PetriNetUnfolder]: 1024/2574 cut-off events. [2021-11-20 06:29:32,566 INFO L130 PetriNetUnfolder]: For 17017/17017 co-relation queries the response was YES. [2021-11-20 06:29:32,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12102 conditions, 2574 events. 1024/2574 cut-off events. For 17017/17017 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19110 event pairs, 22 based on Foata normal form. 32/2597 useless extension candidates. Maximal degree in co-relation 12020. Up to 518 conditions per place. [2021-11-20 06:29:32,628 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 692 selfloop transitions, 194 changer transitions 0/938 dead transitions. [2021-11-20 06:29:32,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 938 transitions, 11941 flow [2021-11-20 06:29:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:29:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 06:29:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2021-11-20 06:29:32,631 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2021-11-20 06:29:32,631 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2021-11-20 06:29:32,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2021-11-20 06:29:32,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:29:32,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2021-11-20 06:29:32,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 0 states have call successors, (0), 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 06:29:32,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 06:29:32,635 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 06:29:32,636 INFO L186 Difference]: Start difference. First operand has 284 places, 398 transitions, 4045 flow. Second operand 7 states and 496 transitions. [2021-11-20 06:29:32,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 938 transitions, 11941 flow [2021-11-20 06:29:32,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 938 transitions, 10924 flow, removed 444 selfloop flow, removed 53 redundant places. [2021-11-20 06:29:32,794 INFO L242 Difference]: Finished difference. Result has 194 places, 520 transitions, 5708 flow [2021-11-20 06:29:32,795 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=3433, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5708, PETRI_PLACES=194, PETRI_TRANSITIONS=520} [2021-11-20 06:29:32,796 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 116 predicate places. [2021-11-20 06:29:32,796 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 520 transitions, 5708 flow [2021-11-20 06:29:32,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 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 06:29:32,796 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:29:32,797 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-20 06:29:32,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:29:32,797 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:29:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:32,798 INFO L85 PathProgramCache]: Analyzing trace with hash -137336448, now seen corresponding path program 2 times [2021-11-20 06:29:32,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:32,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11647418] [2021-11-20 06:29:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:32,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:33,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:33,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11647418] [2021-11-20 06:29:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11647418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:33,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321105974] [2021-11-20 06:29:33,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:29:33,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:33,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:33,758 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:33,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:29:33,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:29:33,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:29:33,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:29:33,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:35,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:38,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321105974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:38,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:38,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 35 [2021-11-20 06:29:38,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371880996] [2021-11-20 06:29:38,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:38,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 06:29:38,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:38,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 06:29:38,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:29:38,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2021-11-20 06:29:38,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 520 transitions, 5708 flow. Second operand has 35 states, 35 states have (on average 53.22857142857143) internal successors, (1863), 35 states have internal predecessors, (1863), 0 states have call successors, (0), 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 06:29:38,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:29:38,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2021-11-20 06:29:38,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:29:56,689 INFO L129 PetriNetUnfolder]: 1368/3746 cut-off events. [2021-11-20 06:29:56,689 INFO L130 PetriNetUnfolder]: For 20368/20407 co-relation queries the response was YES. [2021-11-20 06:29:56,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17763 conditions, 3746 events. 1368/3746 cut-off events. For 20368/20407 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31589 event pairs, 25 based on Foata normal form. 32/3768 useless extension candidates. Maximal degree in co-relation 17719. Up to 899 conditions per place. [2021-11-20 06:29:56,758 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 502 selfloop transitions, 472 changer transitions 61/1084 dead transitions. [2021-11-20 06:29:56,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1084 transitions, 13598 flow [2021-11-20 06:29:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-20 06:29:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-11-20 06:29:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4447 transitions. [2021-11-20 06:29:56,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6238776655443322 [2021-11-20 06:29:56,768 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4447 transitions. [2021-11-20 06:29:56,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4447 transitions. [2021-11-20 06:29:56,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:29:56,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4447 transitions. [2021-11-20 06:29:56,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 54.901234567901234) internal successors, (4447), 81 states have internal predecessors, (4447), 0 states have call successors, (0), 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 06:29:56,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 88.0) internal successors, (7216), 82 states have internal predecessors, (7216), 0 states have call successors, (0), 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 06:29:56,796 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 88.0) internal successors, (7216), 82 states have internal predecessors, (7216), 0 states have call successors, (0), 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 06:29:56,797 INFO L186 Difference]: Start difference. First operand has 194 places, 520 transitions, 5708 flow. Second operand 81 states and 4447 transitions. [2021-11-20 06:29:56,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1084 transitions, 13598 flow [2021-11-20 06:29:56,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1084 transitions, 13532 flow, removed 33 selfloop flow, removed 0 redundant places. [2021-11-20 06:29:57,016 INFO L242 Difference]: Finished difference. Result has 313 places, 819 transitions, 11261 flow [2021-11-20 06:29:57,018 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=11261, PETRI_PLACES=313, PETRI_TRANSITIONS=819} [2021-11-20 06:29:57,019 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 235 predicate places. [2021-11-20 06:29:57,019 INFO L470 AbstractCegarLoop]: Abstraction has has 313 places, 819 transitions, 11261 flow [2021-11-20 06:29:57,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.22857142857143) internal successors, (1863), 35 states have internal predecessors, (1863), 0 states have call successors, (0), 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 06:29:57,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:29:57,021 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-20 06:29:57,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:57,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:29:57,236 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:29:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:57,237 INFO L85 PathProgramCache]: Analyzing trace with hash 304396636, now seen corresponding path program 3 times [2021-11-20 06:29:57,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:57,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856143978] [2021-11-20 06:29:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:57,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:58,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:58,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856143978] [2021-11-20 06:29:58,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856143978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:58,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954583258] [2021-11-20 06:29:58,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:29:58,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:58,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:58,222 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:58,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:29:58,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:29:58,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:29:58,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:29:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:00,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:07,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954583258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:07,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:30:07,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2021-11-20 06:30:07,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262659480] [2021-11-20 06:30:07,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:07,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:30:07,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:07,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:30:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:30:07,375 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-11-20 06:30:07,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 819 transitions, 11261 flow. Second operand has 39 states, 39 states have (on average 51.256410256410255) internal successors, (1999), 39 states have internal predecessors, (1999), 0 states have call successors, (0), 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 06:30:07,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:30:07,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-11-20 06:30:07,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:30:21,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:31:04,760 INFO L129 PetriNetUnfolder]: 2070/5331 cut-off events. [2021-11-20 06:31:04,760 INFO L130 PetriNetUnfolder]: For 44362/44362 co-relation queries the response was YES. [2021-11-20 06:31:04,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30158 conditions, 5331 events. 2070/5331 cut-off events. For 44362/44362 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 46546 event pairs, 88 based on Foata normal form. 9/5332 useless extension candidates. Maximal degree in co-relation 30075. Up to 1682 conditions per place. [2021-11-20 06:31:04,866 INFO L132 encePairwiseOnDemand]: 67/88 looper letters, 711 selfloop transitions, 598 changer transitions 81/1429 dead transitions. [2021-11-20 06:31:04,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1429 transitions, 21473 flow [2021-11-20 06:31:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-20 06:31:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-11-20 06:31:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4667 transitions. [2021-11-20 06:31:04,876 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6026601239669421 [2021-11-20 06:31:04,877 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4667 transitions. [2021-11-20 06:31:04,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4667 transitions. [2021-11-20 06:31:04,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:31:04,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4667 transitions. [2021-11-20 06:31:04,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 53.03409090909091) internal successors, (4667), 88 states have internal predecessors, (4667), 0 states have call successors, (0), 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 06:31:04,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 88.0) internal successors, (7832), 89 states have internal predecessors, (7832), 0 states have call successors, (0), 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 06:31:04,908 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 88.0) internal successors, (7832), 89 states have internal predecessors, (7832), 0 states have call successors, (0), 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 06:31:04,908 INFO L186 Difference]: Start difference. First operand has 313 places, 819 transitions, 11261 flow. Second operand 88 states and 4667 transitions. [2021-11-20 06:31:04,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1429 transitions, 21473 flow [2021-11-20 06:31:05,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1429 transitions, 20738 flow, removed 332 selfloop flow, removed 32 redundant places. [2021-11-20 06:31:05,617 INFO L242 Difference]: Finished difference. Result has 396 places, 1091 transitions, 16918 flow [2021-11-20 06:31:05,619 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=10770, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=16918, PETRI_PLACES=396, PETRI_TRANSITIONS=1091} [2021-11-20 06:31:05,620 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 318 predicate places. [2021-11-20 06:31:05,620 INFO L470 AbstractCegarLoop]: Abstraction has has 396 places, 1091 transitions, 16918 flow [2021-11-20 06:31:05,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 51.256410256410255) internal successors, (1999), 39 states have internal predecessors, (1999), 0 states have call successors, (0), 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 06:31:05,622 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:31:05,622 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:31:05,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:31:05,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:05,823 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:31:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash 553653098, now seen corresponding path program 3 times [2021-11-20 06:31:05,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:31:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110252559] [2021-11-20 06:31:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:05,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:31:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:31:06,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:31:06,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110252559] [2021-11-20 06:31:06,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110252559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:31:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147110607] [2021-11-20 06:31:06,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:31:06,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:31:06,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:31:06,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:31:06,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:31:06,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:31:06,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 06:31:06,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:31:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:31:08,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:31:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:31:09,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147110607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:31:09,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:31:09,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 18] total 41 [2021-11-20 06:31:09,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706869275] [2021-11-20 06:31:09,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:31:09,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 06:31:09,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:31:09,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 06:31:09,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:31:09,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-11-20 06:31:09,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1091 transitions, 16918 flow. Second operand has 41 states, 41 states have (on average 51.21951219512195) internal successors, (2100), 41 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:09,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:31:09,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-11-20 06:31:09,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:31:51,182 INFO L129 PetriNetUnfolder]: 2957/7531 cut-off events. [2021-11-20 06:31:51,183 INFO L130 PetriNetUnfolder]: For 107456/107456 co-relation queries the response was YES. [2021-11-20 06:31:51,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50346 conditions, 7531 events. 2957/7531 cut-off events. For 107456/107456 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 69287 event pairs, 79 based on Foata normal form. 14/7534 useless extension candidates. Maximal degree in co-relation 50232. Up to 1511 conditions per place. [2021-11-20 06:31:51,390 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 581 selfloop transitions, 1335 changer transitions 93/2048 dead transitions. [2021-11-20 06:31:51,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 2048 transitions, 35592 flow [2021-11-20 06:31:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-20 06:31:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-11-20 06:31:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 6587 transitions. [2021-11-20 06:31:51,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5988181818181818 [2021-11-20 06:31:51,407 INFO L72 ComplementDD]: Start complementDD. Operand 125 states and 6587 transitions. [2021-11-20 06:31:51,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 6587 transitions. [2021-11-20 06:31:51,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:31:51,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 125 states and 6587 transitions. [2021-11-20 06:31:51,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 126 states, 125 states have (on average 52.696) internal successors, (6587), 125 states have internal predecessors, (6587), 0 states have call successors, (0), 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 06:31:51,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 126 states, 126 states have (on average 88.0) internal successors, (11088), 126 states have internal predecessors, (11088), 0 states have call successors, (0), 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 06:31:51,452 INFO L81 ComplementDD]: Finished complementDD. Result has 126 states, 126 states have (on average 88.0) internal successors, (11088), 126 states have internal predecessors, (11088), 0 states have call successors, (0), 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 06:31:51,452 INFO L186 Difference]: Start difference. First operand has 396 places, 1091 transitions, 16918 flow. Second operand 125 states and 6587 transitions. [2021-11-20 06:31:51,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 2048 transitions, 35592 flow [2021-11-20 06:31:52,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2048 transitions, 34119 flow, removed 442 selfloop flow, removed 45 redundant places. [2021-11-20 06:31:52,815 INFO L242 Difference]: Finished difference. Result has 525 places, 1652 transitions, 30254 flow [2021-11-20 06:31:52,816 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=16014, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=809, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=30254, PETRI_PLACES=525, PETRI_TRANSITIONS=1652} [2021-11-20 06:31:52,817 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 447 predicate places. [2021-11-20 06:31:52,817 INFO L470 AbstractCegarLoop]: Abstraction has has 525 places, 1652 transitions, 30254 flow [2021-11-20 06:31:52,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 51.21951219512195) internal successors, (2100), 41 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:52,818 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:31:52,818 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:31:52,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:31:53,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:53,019 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:31:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash 25916205, now seen corresponding path program 4 times [2021-11-20 06:31:53,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:31:53,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984752957] [2021-11-20 06:31:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:53,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:31:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:31:55,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:31:55,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984752957] [2021-11-20 06:31:55,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984752957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:31:55,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196694482] [2021-11-20 06:31:55,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:31:55,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:55,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:31:55,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:31:55,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:31:55,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:31:55,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:31:55,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:31:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:31:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:31:58,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:32:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:32:08,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196694482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:08,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:32:08,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 39 [2021-11-20 06:32:08,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309787353] [2021-11-20 06:32:08,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:08,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:32:08,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:32:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:32:08,357 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2021-11-20 06:32:08,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1652 transitions, 30254 flow. Second operand has 39 states, 39 states have (on average 53.256410256410255) internal successors, (2077), 39 states have internal predecessors, (2077), 0 states have call successors, (0), 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 06:32:08,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:32:08,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2021-11-20 06:32:08,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:33:25,604 INFO L129 PetriNetUnfolder]: 3026/8304 cut-off events. [2021-11-20 06:33:25,604 INFO L130 PetriNetUnfolder]: For 231643/231771 co-relation queries the response was YES. [2021-11-20 06:33:25,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73295 conditions, 8304 events. 3026/8304 cut-off events. For 231643/231771 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 81415 event pairs, 47 based on Foata normal form. 73/8371 useless extension candidates. Maximal degree in co-relation 73131. Up to 2367 conditions per place. [2021-11-20 06:33:25,986 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 1114 selfloop transitions, 936 changer transitions 93/2307 dead transitions. [2021-11-20 06:33:25,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 2307 transitions, 47105 flow [2021-11-20 06:33:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-20 06:33:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-11-20 06:33:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 4928 transitions. [2021-11-20 06:33:25,998 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2021-11-20 06:33:25,999 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 4928 transitions. [2021-11-20 06:33:25,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 4928 transitions. [2021-11-20 06:33:26,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:33:26,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 4928 transitions. [2021-11-20 06:33:26,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 54.75555555555555) internal successors, (4928), 90 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 06:33:26,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 0 states have call successors, (0), 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 06:33:26,034 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 0 states have call successors, (0), 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 06:33:26,035 INFO L186 Difference]: Start difference. First operand has 525 places, 1652 transitions, 30254 flow. Second operand 90 states and 4928 transitions. [2021-11-20 06:33:26,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 2307 transitions, 47105 flow [2021-11-20 06:33:30,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 2307 transitions, 43689 flow, removed 1344 selfloop flow, removed 42 redundant places. [2021-11-20 06:33:30,323 INFO L242 Difference]: Finished difference. Result has 599 places, 1990 transitions, 38446 flow [2021-11-20 06:33:30,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=28133, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=641, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=895, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=38446, PETRI_PLACES=599, PETRI_TRANSITIONS=1990} [2021-11-20 06:33:30,326 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 521 predicate places. [2021-11-20 06:33:30,327 INFO L470 AbstractCegarLoop]: Abstraction has has 599 places, 1990 transitions, 38446 flow [2021-11-20 06:33:30,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 53.256410256410255) internal successors, (2077), 39 states have internal predecessors, (2077), 0 states have call successors, (0), 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 06:33:30,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:33:30,328 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:33:30,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:33:30,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:33:30,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:33:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1889315571, now seen corresponding path program 5 times [2021-11-20 06:33:30,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:30,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46502842] [2021-11-20 06:33:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:30,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:32,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:32,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46502842] [2021-11-20 06:33:32,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46502842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:33:32,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555634065] [2021-11-20 06:33:32,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:33:32,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:32,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:33:32,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:33:32,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0daae7e2-ec30-4356-b5be-b8ef5a662a71/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:33:32,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:33:32,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:33:32,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 06:33:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:33:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:34,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:33:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:41,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555634065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:33:41,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:33:41,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 22] total 51 [2021-11-20 06:33:41,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296024632] [2021-11-20 06:33:41,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:33:41,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 06:33:41,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 06:33:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 06:33:41,987 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-11-20 06:33:41,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1990 transitions, 38446 flow. Second operand has 51 states, 51 states have (on average 50.90196078431372) internal successors, (2596), 51 states have internal predecessors, (2596), 0 states have call successors, (0), 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 06:33:41,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:33:41,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-11-20 06:33:41,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:33:57,159 WARN L227 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 137 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:34:00,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:34:32,952 WARN L227 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 143 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:35:11,090 WARN L227 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 158 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:35:14,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:35:17,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:36:25,292 WARN L227 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 119 DAG size of output: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:36:37,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:36:39,722 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:36:46,026 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:37:09,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:37:26,623 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 118 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)