./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:28:50,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:28:50,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:28:50,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:28:50,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:28:50,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:28:50,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:28:50,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:28:50,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:28:50,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:28:50,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:28:50,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:28:50,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:28:50,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:28:50,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:28:50,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:28:50,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:28:50,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:28:50,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:28:50,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:28:50,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:28:50,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:28:50,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:28:50,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:28:50,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:28:50,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:28:50,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:28:50,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:28:50,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:28:50,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:28:50,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:28:50,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:28:50,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:28:50,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:28:50,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:28:50,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:28:50,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:28:50,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:28:50,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:28:50,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:28:50,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:28:50,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 17:28:50,936 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:28:50,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:28:50,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:28:50,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:28:50,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:28:50,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:28:50,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:28:50,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:28:50,939 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:28:50,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:28:50,941 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:28:50,941 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:28:50,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:28:50,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:28:50,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:28:50,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:28:50,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:28:50,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:28:50,943 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 17:28:50,943 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:28:50,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:28:50,944 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:28:50,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:28:50,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:28:50,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:28:50,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:28:50,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:28:50,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:28:50,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:28:50,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:28:50,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:28:50,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:28:50,947 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:28:50,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:28:50,947 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:28:50,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:28:50,948 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-11-25 17:28:51,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:28:51,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:28:51,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:28:51,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:28:51,305 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:28:51,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-25 17:28:54,266 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:28:54,437 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:28:54,438 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-25 17:28:54,444 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/data/3f7b0d496/ea374523ee034e14bb5e0143cfccf248/FLAG6659ec4b0 [2022-11-25 17:28:54,458 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/data/3f7b0d496/ea374523ee034e14bb5e0143cfccf248 [2022-11-25 17:28:54,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:28:54,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:28:54,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:28:54,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:28:54,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:28:54,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb578f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54, skipping insertion in model container [2022-11-25 17:28:54,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:28:54,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:28:54,663 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:54,664 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:54,668 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:54,669 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:54,675 WARN L237 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_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-25 17:28:54,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:28:54,685 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:28:54,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:54,697 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:54,698 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:28:54,699 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:28:54,713 WARN L237 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_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-25 17:28:54,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:28:54,727 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:28:54,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54 WrapperNode [2022-11-25 17:28:54,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:28:54,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:28:54,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:28:54,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:28:54,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,759 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2022-11-25 17:28:54,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:28:54,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:28:54,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:28:54,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:28:54,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,788 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:28:54,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:28:54,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:28:54,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:28:54,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (1/1) ... [2022-11-25 17:28:54,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:28:54,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:54,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:28:54,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:28:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:28:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:28:54,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:28:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:28:54,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:28:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:28:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:28:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:28:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:28:54,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:28:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:28:54,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:28:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:28:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:28:54,879 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:28:54,980 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:28:54,982 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:28:55,225 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:28:55,296 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:28:55,296 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:28:55,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:28:55 BoogieIcfgContainer [2022-11-25 17:28:55,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:28:55,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:28:55,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:28:55,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:28:55,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:28:54" (1/3) ... [2022-11-25 17:28:55,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2add8acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:28:55, skipping insertion in model container [2022-11-25 17:28:55,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:28:54" (2/3) ... [2022-11-25 17:28:55,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2add8acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:28:55, skipping insertion in model container [2022-11-25 17:28:55,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:28:55" (3/3) ... [2022-11-25 17:28:55,308 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-11-25 17:28:55,316 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:28:55,327 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:28:55,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-25 17:28:55,328 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:28:55,474 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:28:55,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 88 transitions, 192 flow [2022-11-25 17:28:55,612 INFO L130 PetriNetUnfolder]: 5/86 cut-off events. [2022-11-25 17:28:55,618 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:28:55,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 5/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-11-25 17:28:55,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 88 transitions, 192 flow [2022-11-25 17:28:55,632 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 67 transitions, 143 flow [2022-11-25 17:28:55,636 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:28:55,654 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 67 transitions, 143 flow [2022-11-25 17:28:55,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 67 transitions, 143 flow [2022-11-25 17:28:55,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 67 transitions, 143 flow [2022-11-25 17:28:55,700 INFO L130 PetriNetUnfolder]: 4/67 cut-off events. [2022-11-25 17:28:55,700 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:28:55,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 67 events. 4/67 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-11-25 17:28:55,702 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2022-11-25 17:28:58,569 INFO L134 LiptonReduction]: Checked pairs total: 1033 [2022-11-25 17:28:58,569 INFO L136 LiptonReduction]: Total number of compositions: 59 [2022-11-25 17:28:58,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:28:58,601 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12c73488, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:28:58,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-25 17:28:58,605 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-11-25 17:28:58,605 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:28:58,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:58,606 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:28:58,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:28:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash 11082179, now seen corresponding path program 1 times [2022-11-25 17:28:58,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:58,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458531780] [2022-11-25 17:28:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458531780] [2022-11-25 17:28:58,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458531780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:58,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:28:58,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:28:58,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18300561] [2022-11-25 17:28:58,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:58,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:28:58,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:28:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:28:58,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-25 17:28:58,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:58,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:58,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-25 17:28:58,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:59,104 INFO L130 PetriNetUnfolder]: 215/331 cut-off events. [2022-11-25 17:28:59,104 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-25 17:28:59,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 331 events. 215/331 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 1221 event pairs, 41 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 595. Up to 303 conditions per place. [2022-11-25 17:28:59,116 INFO L137 encePairwiseOnDemand]: 136/147 looper letters, 21 selfloop transitions, 4 changer transitions 3/30 dead transitions. [2022-11-25 17:28:59,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 131 flow [2022-11-25 17:28:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:28:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:28:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-11-25 17:28:59,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2022-11-25 17:28:59,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-11-25 17:28:59,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-11-25 17:28:59,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:59,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-11-25 17:28:59,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,157 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 255 transitions. [2022-11-25 17:28:59,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 131 flow [2022-11-25 17:28:59,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:28:59,165 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 80 flow [2022-11-25 17:28:59,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2022-11-25 17:28:59,176 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2022-11-25 17:28:59,177 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 80 flow [2022-11-25 17:28:59,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,178 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:59,178 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:28:59,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:28:59,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:28:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash 343548796, now seen corresponding path program 1 times [2022-11-25 17:28:59,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:59,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241211471] [2022-11-25 17:28:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:59,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:59,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:59,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241211471] [2022-11-25 17:28:59,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241211471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:28:59,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35966530] [2022-11-25 17:28:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:59,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:59,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:28:59,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:28:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:28:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:28:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:59,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:28:59,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35966530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:28:59,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:28:59,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-25 17:28:59,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998813759] [2022-11-25 17:28:59,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:28:59,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:28:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:28:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:28:59,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-25 17:28:59,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:59,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-25 17:28:59,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:59,621 INFO L130 PetriNetUnfolder]: 187/293 cut-off events. [2022-11-25 17:28:59,642 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 17:28:59,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 293 events. 187/293 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1092 event pairs, 37 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 673. Up to 254 conditions per place. [2022-11-25 17:28:59,646 INFO L137 encePairwiseOnDemand]: 143/147 looper letters, 25 selfloop transitions, 3 changer transitions 3/32 dead transitions. [2022-11-25 17:28:59,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 160 flow [2022-11-25 17:28:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:28:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:28:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 321 transitions. [2022-11-25 17:28:59,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5459183673469388 [2022-11-25 17:28:59,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 321 transitions. [2022-11-25 17:28:59,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 321 transitions. [2022-11-25 17:28:59,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:59,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 321 transitions. [2022-11-25 17:28:59,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,653 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 80 flow. Second operand 4 states and 321 transitions. [2022-11-25 17:28:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 160 flow [2022-11-25 17:28:59,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:28:59,654 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 74 flow [2022-11-25 17:28:59,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2022-11-25 17:28:59,655 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2022-11-25 17:28:59,656 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 74 flow [2022-11-25 17:28:59,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:59,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:59,656 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:28:59,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:28:59,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:59,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:28:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash 343548802, now seen corresponding path program 1 times [2022-11-25 17:28:59,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:59,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095042718] [2022-11-25 17:28:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:59,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:59,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095042718] [2022-11-25 17:28:59,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095042718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:28:59,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583388131] [2022-11-25 17:28:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:59,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:59,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:59,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:28:59,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:29:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:29:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:00,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:00,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583388131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:00,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:00,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:29:00,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645500326] [2022-11-25 17:29:00,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:00,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:29:00,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:00,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:29:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:29:00,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-25 17:29:00,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:00,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:00,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-25 17:29:00,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:00,392 INFO L130 PetriNetUnfolder]: 567/877 cut-off events. [2022-11-25 17:29:00,392 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:29:00,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2326 conditions, 877 events. 567/877 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 4315 event pairs, 80 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 1767. Up to 517 conditions per place. [2022-11-25 17:29:00,404 INFO L137 encePairwiseOnDemand]: 144/147 looper letters, 60 selfloop transitions, 5 changer transitions 3/69 dead transitions. [2022-11-25 17:29:00,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 69 transitions, 356 flow [2022-11-25 17:29:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:29:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:29:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 504 transitions. [2022-11-25 17:29:00,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2022-11-25 17:29:00,411 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 504 transitions. [2022-11-25 17:29:00,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 504 transitions. [2022-11-25 17:29:00,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:00,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 504 transitions. [2022-11-25 17:29:00,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:00,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:00,420 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:00,420 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 74 flow. Second operand 6 states and 504 transitions. [2022-11-25 17:29:00,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 69 transitions, 356 flow [2022-11-25 17:29:00,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 69 transitions, 353 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:29:00,428 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 101 flow [2022-11-25 17:29:00,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2022-11-25 17:29:00,430 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2022-11-25 17:29:00,430 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 101 flow [2022-11-25 17:29:00,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:00,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:00,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:29:00,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:00,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:00,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash 343548778, now seen corresponding path program 1 times [2022-11-25 17:29:00,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:00,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065223568] [2022-11-25 17:29:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:00,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:00,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:00,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065223568] [2022-11-25 17:29:00,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065223568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:00,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686793245] [2022-11-25 17:29:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:00,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:00,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:00,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:00,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:29:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:29:00,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:00,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:00,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686793245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:00,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:00,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 17:29:00,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048715051] [2022-11-25 17:29:00,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:00,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:29:00,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:29:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:29:00,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-25 17:29:00,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 101 flow. Second operand has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:00,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:00,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-25 17:29:00,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:01,108 INFO L130 PetriNetUnfolder]: 681/1169 cut-off events. [2022-11-25 17:29:01,108 INFO L131 PetriNetUnfolder]: For 412/412 co-relation queries the response was YES. [2022-11-25 17:29:01,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3307 conditions, 1169 events. 681/1169 cut-off events. For 412/412 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6289 event pairs, 89 based on Foata normal form. 72/1023 useless extension candidates. Maximal degree in co-relation 3068. Up to 579 conditions per place. [2022-11-25 17:29:01,117 INFO L137 encePairwiseOnDemand]: 138/147 looper letters, 50 selfloop transitions, 29 changer transitions 0/81 dead transitions. [2022-11-25 17:29:01,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 81 transitions, 494 flow [2022-11-25 17:29:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:29:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:29:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 596 transitions. [2022-11-25 17:29:01,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5792031098153547 [2022-11-25 17:29:01,121 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 596 transitions. [2022-11-25 17:29:01,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 596 transitions. [2022-11-25 17:29:01,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:01,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 596 transitions. [2022-11-25 17:29:01,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.14285714285714) internal successors, (596), 7 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:01,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:01,127 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:01,127 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 101 flow. Second operand 7 states and 596 transitions. [2022-11-25 17:29:01,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 81 transitions, 494 flow [2022-11-25 17:29:01,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 81 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:01,135 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 401 flow [2022-11-25 17:29:01,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=401, PETRI_PLACES=42, PETRI_TRANSITIONS=46} [2022-11-25 17:29:01,136 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2022-11-25 17:29:01,137 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 401 flow [2022-11-25 17:29:01,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:01,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:01,138 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:29:01,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:01,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:01,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash 343548777, now seen corresponding path program 1 times [2022-11-25 17:29:01,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:01,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453667629] [2022-11-25 17:29:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:01,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453667629] [2022-11-25 17:29:01,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453667629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413607694] [2022-11-25 17:29:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:01,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:01,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:01,400 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:01,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:29:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:01,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:29:01,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:01,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:29:01,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413607694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:01,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:29:01,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-25 17:29:01,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715356896] [2022-11-25 17:29:01,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:01,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:29:01,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:29:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:29:01,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-25 17:29:01,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 401 flow. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:01,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:01,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-25 17:29:01,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:01,739 INFO L130 PetriNetUnfolder]: 737/1283 cut-off events. [2022-11-25 17:29:01,739 INFO L131 PetriNetUnfolder]: For 2401/2401 co-relation queries the response was YES. [2022-11-25 17:29:01,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 1283 events. 737/1283 cut-off events. For 2401/2401 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7078 event pairs, 129 based on Foata normal form. 118/1169 useless extension candidates. Maximal degree in co-relation 5177. Up to 642 conditions per place. [2022-11-25 17:29:01,750 INFO L137 encePairwiseOnDemand]: 138/147 looper letters, 34 selfloop transitions, 24 changer transitions 0/60 dead transitions. [2022-11-25 17:29:01,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 632 flow [2022-11-25 17:29:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:29:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:29:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2022-11-25 17:29:01,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2022-11-25 17:29:01,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 324 transitions. [2022-11-25 17:29:01,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 324 transitions. [2022-11-25 17:29:01,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:01,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 324 transitions. [2022-11-25 17:29:01,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:01,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:01,756 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:01,756 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 401 flow. Second operand 4 states and 324 transitions. [2022-11-25 17:29:01,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 632 flow [2022-11-25 17:29:01,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 564 flow, removed 34 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:01,773 INFO L231 Difference]: Finished difference. Result has 44 places, 53 transitions, 548 flow [2022-11-25 17:29:01,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=548, PETRI_PLACES=44, PETRI_TRANSITIONS=53} [2022-11-25 17:29:01,776 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2022-11-25 17:29:01,776 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 53 transitions, 548 flow [2022-11-25 17:29:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:01,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:01,777 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:01,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:01,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:01,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1992099323, now seen corresponding path program 1 times [2022-11-25 17:29:01,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:01,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013826166] [2022-11-25 17:29:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:01,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:02,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:02,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013826166] [2022-11-25 17:29:02,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013826166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:02,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:02,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:29:02,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926880752] [2022-11-25 17:29:02,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:02,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:29:02,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:02,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:29:02,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:29:02,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-25 17:29:02,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 53 transitions, 548 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:02,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:02,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-25 17:29:02,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:02,305 INFO L130 PetriNetUnfolder]: 725/1293 cut-off events. [2022-11-25 17:29:02,305 INFO L131 PetriNetUnfolder]: For 3067/3067 co-relation queries the response was YES. [2022-11-25 17:29:02,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5552 conditions, 1293 events. 725/1293 cut-off events. For 3067/3067 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6996 event pairs, 375 based on Foata normal form. 0/1089 useless extension candidates. Maximal degree in co-relation 5380. Up to 1109 conditions per place. [2022-11-25 17:29:02,317 INFO L137 encePairwiseOnDemand]: 143/147 looper letters, 64 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2022-11-25 17:29:02,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 69 transitions, 820 flow [2022-11-25 17:29:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:29:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:29:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2022-11-25 17:29:02,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2022-11-25 17:29:02,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2022-11-25 17:29:02,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2022-11-25 17:29:02,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:02,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2022-11-25 17:29:02,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:02,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:02,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:02,321 INFO L175 Difference]: Start difference. First operand has 44 places, 53 transitions, 548 flow. Second operand 3 states and 245 transitions. [2022-11-25 17:29:02,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 69 transitions, 820 flow [2022-11-25 17:29:02,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 69 transitions, 747 flow, removed 36 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:02,332 INFO L231 Difference]: Finished difference. Result has 46 places, 56 transitions, 553 flow [2022-11-25 17:29:02,333 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=553, PETRI_PLACES=46, PETRI_TRANSITIONS=56} [2022-11-25 17:29:02,333 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2022-11-25 17:29:02,333 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 56 transitions, 553 flow [2022-11-25 17:29:02,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:02,334 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:02,334 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 17:29:02,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:29:02,334 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash -244200573, now seen corresponding path program 2 times [2022-11-25 17:29:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:02,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030491733] [2022-11-25 17:29:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:02,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:02,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:02,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030491733] [2022-11-25 17:29:02,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030491733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:02,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571584606] [2022-11-25 17:29:02,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:29:02,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:02,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:02,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:02,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:29:02,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:29:02,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:02,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:29:02,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:02,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:02,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571584606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:02,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:02,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:29:02,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001336357] [2022-11-25 17:29:02,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:02,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:29:02,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:29:02,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:29:02,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-25 17:29:02,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 56 transitions, 553 flow. Second operand has 13 states, 13 states have (on average 74.3076923076923) internal successors, (966), 13 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:02,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:02,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-25 17:29:02,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:03,347 INFO L130 PetriNetUnfolder]: 1801/3195 cut-off events. [2022-11-25 17:29:03,347 INFO L131 PetriNetUnfolder]: For 8298/8372 co-relation queries the response was YES. [2022-11-25 17:29:03,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12713 conditions, 3195 events. 1801/3195 cut-off events. For 8298/8372 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20631 event pairs, 203 based on Foata normal form. 456/2949 useless extension candidates. Maximal degree in co-relation 12270. Up to 831 conditions per place. [2022-11-25 17:29:03,374 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 100 selfloop transitions, 132 changer transitions 0/234 dead transitions. [2022-11-25 17:29:03,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 234 transitions, 2260 flow [2022-11-25 17:29:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:29:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:29:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1032 transitions. [2022-11-25 17:29:03,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2022-11-25 17:29:03,378 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1032 transitions. [2022-11-25 17:29:03,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1032 transitions. [2022-11-25 17:29:03,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:03,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1032 transitions. [2022-11-25 17:29:03,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.0) internal successors, (1032), 12 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:03,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 147.0) internal successors, (1911), 13 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:03,385 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 147.0) internal successors, (1911), 13 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:03,386 INFO L175 Difference]: Start difference. First operand has 46 places, 56 transitions, 553 flow. Second operand 12 states and 1032 transitions. [2022-11-25 17:29:03,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 234 transitions, 2260 flow [2022-11-25 17:29:03,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 234 transitions, 2249 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:03,400 INFO L231 Difference]: Finished difference. Result has 66 places, 164 transitions, 2244 flow [2022-11-25 17:29:03,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2244, PETRI_PLACES=66, PETRI_TRANSITIONS=164} [2022-11-25 17:29:03,401 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2022-11-25 17:29:03,401 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 164 transitions, 2244 flow [2022-11-25 17:29:03,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.3076923076923) internal successors, (966), 13 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:03,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:03,402 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 17:29:03,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 17:29:03,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:03,608 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash -244200549, now seen corresponding path program 2 times [2022-11-25 17:29:03,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:03,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650316439] [2022-11-25 17:29:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:03,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:03,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:03,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650316439] [2022-11-25 17:29:03,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650316439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:03,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79048408] [2022-11-25 17:29:03,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:29:03,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:03,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:03,743 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:03,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:29:03,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:29:03,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:03,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:29:03,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:29:03,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:29:03,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79048408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:03,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:29:03,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-11-25 17:29:03,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920515935] [2022-11-25 17:29:03,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:03,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:29:03,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:29:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:29:03,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-25 17:29:03,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 164 transitions, 2244 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:03,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:03,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-25 17:29:03,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:04,311 INFO L130 PetriNetUnfolder]: 1147/2065 cut-off events. [2022-11-25 17:29:04,312 INFO L131 PetriNetUnfolder]: For 10177/10240 co-relation queries the response was YES. [2022-11-25 17:29:04,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9440 conditions, 2065 events. 1147/2065 cut-off events. For 10177/10240 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12437 event pairs, 775 based on Foata normal form. 112/1968 useless extension candidates. Maximal degree in co-relation 9282. Up to 2060 conditions per place. [2022-11-25 17:29:04,332 INFO L137 encePairwiseOnDemand]: 144/147 looper letters, 111 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2022-11-25 17:29:04,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 114 transitions, 1788 flow [2022-11-25 17:29:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:29:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:29:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2022-11-25 17:29:04,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5260770975056689 [2022-11-25 17:29:04,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2022-11-25 17:29:04,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2022-11-25 17:29:04,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:04,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2022-11-25 17:29:04,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:04,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:04,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:04,337 INFO L175 Difference]: Start difference. First operand has 66 places, 164 transitions, 2244 flow. Second operand 3 states and 232 transitions. [2022-11-25 17:29:04,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 114 transitions, 1788 flow [2022-11-25 17:29:04,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 114 transitions, 1574 flow, removed 95 selfloop flow, removed 3 redundant places. [2022-11-25 17:29:04,384 INFO L231 Difference]: Finished difference. Result has 63 places, 114 transitions, 1352 flow [2022-11-25 17:29:04,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1352, PETRI_PLACES=63, PETRI_TRANSITIONS=114} [2022-11-25 17:29:04,387 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2022-11-25 17:29:04,387 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 114 transitions, 1352 flow [2022-11-25 17:29:04,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:04,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:04,388 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:04,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:04,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:04,594 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1496463677, now seen corresponding path program 1 times [2022-11-25 17:29:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:04,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665112024] [2022-11-25 17:29:04,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:04,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:29:04,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:04,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665112024] [2022-11-25 17:29:04,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665112024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:04,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279959161] [2022-11-25 17:29:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:04,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:04,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:04,691 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:04,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:29:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:29:04,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:29:04,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:29:04,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279959161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:04,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:29:04,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-25 17:29:04,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010444131] [2022-11-25 17:29:04,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:04,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:29:04,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:04,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:29:04,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:29:04,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 147 [2022-11-25 17:29:04,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 114 transitions, 1352 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:04,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:04,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 147 [2022-11-25 17:29:04,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:05,113 INFO L130 PetriNetUnfolder]: 964/1732 cut-off events. [2022-11-25 17:29:05,113 INFO L131 PetriNetUnfolder]: For 7277/7277 co-relation queries the response was YES. [2022-11-25 17:29:05,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6711 conditions, 1732 events. 964/1732 cut-off events. For 7277/7277 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9586 event pairs, 236 based on Foata normal form. 0/1732 useless extension candidates. Maximal degree in co-relation 6681. Up to 1209 conditions per place. [2022-11-25 17:29:05,132 INFO L137 encePairwiseOnDemand]: 144/147 looper letters, 110 selfloop transitions, 11 changer transitions 0/122 dead transitions. [2022-11-25 17:29:05,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 122 transitions, 1595 flow [2022-11-25 17:29:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:29:05,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:29:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2022-11-25 17:29:05,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2022-11-25 17:29:05,134 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 318 transitions. [2022-11-25 17:29:05,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 318 transitions. [2022-11-25 17:29:05,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:05,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 318 transitions. [2022-11-25 17:29:05,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:05,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:05,138 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:05,138 INFO L175 Difference]: Start difference. First operand has 63 places, 114 transitions, 1352 flow. Second operand 4 states and 318 transitions. [2022-11-25 17:29:05,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 122 transitions, 1595 flow [2022-11-25 17:29:05,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 122 transitions, 1584 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:05,166 INFO L231 Difference]: Finished difference. Result has 64 places, 92 transitions, 1107 flow [2022-11-25 17:29:05,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1107, PETRI_PLACES=64, PETRI_TRANSITIONS=92} [2022-11-25 17:29:05,168 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2022-11-25 17:29:05,168 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 92 transitions, 1107 flow [2022-11-25 17:29:05,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:05,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:05,168 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-11-25 17:29:05,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:05,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:05,375 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:05,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1922691619, now seen corresponding path program 3 times [2022-11-25 17:29:05,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:05,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210613629] [2022-11-25 17:29:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:05,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:05,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210613629] [2022-11-25 17:29:05,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210613629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:05,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245982321] [2022-11-25 17:29:05,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:29:05,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:05,561 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:05,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:29:05,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:29:05,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:05,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:29:05,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:05,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:05,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245982321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:05,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:05,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-25 17:29:05,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804406686] [2022-11-25 17:29:05,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:05,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:29:05,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:05,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:29:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:29:05,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-25 17:29:05,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 92 transitions, 1107 flow. Second operand has 25 states, 25 states have (on average 74.16) internal successors, (1854), 25 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:05,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:05,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-25 17:29:05,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:07,047 INFO L130 PetriNetUnfolder]: 2397/4263 cut-off events. [2022-11-25 17:29:07,047 INFO L131 PetriNetUnfolder]: For 59091/59225 co-relation queries the response was YES. [2022-11-25 17:29:07,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15491 conditions, 4263 events. 2397/4263 cut-off events. For 59091/59225 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 25542 event pairs, 315 based on Foata normal form. 700/4961 useless extension candidates. Maximal degree in co-relation 15461. Up to 876 conditions per place. [2022-11-25 17:29:07,076 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 108 selfloop transitions, 242 changer transitions 66/418 dead transitions. [2022-11-25 17:29:07,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 418 transitions, 4044 flow [2022-11-25 17:29:07,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:29:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:29:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2007 transitions. [2022-11-25 17:29:07,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5688775510204082 [2022-11-25 17:29:07,083 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2007 transitions. [2022-11-25 17:29:07,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2007 transitions. [2022-11-25 17:29:07,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:07,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2007 transitions. [2022-11-25 17:29:07,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.625) internal successors, (2007), 24 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:07,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 147.0) internal successors, (3675), 25 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:07,097 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 147.0) internal successors, (3675), 25 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:07,097 INFO L175 Difference]: Start difference. First operand has 64 places, 92 transitions, 1107 flow. Second operand 24 states and 2007 transitions. [2022-11-25 17:29:07,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 418 transitions, 4044 flow [2022-11-25 17:29:07,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 418 transitions, 4020 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:29:07,136 INFO L231 Difference]: Finished difference. Result has 107 places, 264 transitions, 3960 flow [2022-11-25 17:29:07,137 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3960, PETRI_PLACES=107, PETRI_TRANSITIONS=264} [2022-11-25 17:29:07,138 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 81 predicate places. [2022-11-25 17:29:07,138 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 264 transitions, 3960 flow [2022-11-25 17:29:07,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.16) internal successors, (1854), 25 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:07,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:07,139 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2022-11-25 17:29:07,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 17:29:07,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:29:07,344 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:07,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1014355811, now seen corresponding path program 4 times [2022-11-25 17:29:07,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:07,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529866981] [2022-11-25 17:29:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:08,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:08,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529866981] [2022-11-25 17:29:08,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529866981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:08,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725295876] [2022-11-25 17:29:08,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:29:08,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:08,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:08,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:08,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:29:08,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:29:08,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:08,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:29:08,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:08,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:09,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725295876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:09,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:09,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-11-25 17:29:09,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604423185] [2022-11-25 17:29:09,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:09,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 17:29:09,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 17:29:09,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:29:09,129 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-25 17:29:09,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 264 transitions, 3960 flow. Second operand has 49 states, 49 states have (on average 74.08163265306122) internal successors, (3630), 49 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:09,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:09,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-25 17:29:09,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:13,563 INFO L130 PetriNetUnfolder]: 7809/13767 cut-off events. [2022-11-25 17:29:13,564 INFO L131 PetriNetUnfolder]: For 728963/729241 co-relation queries the response was YES. [2022-11-25 17:29:13,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58034 conditions, 13767 events. 7809/13767 cut-off events. For 728963/729241 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 90594 event pairs, 939 based on Foata normal form. 1468/15233 useless extension candidates. Maximal degree in co-relation 57981. Up to 3987 conditions per place. [2022-11-25 17:29:13,717 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 204 selfloop transitions, 882 changer transitions 138/1226 dead transitions. [2022-11-25 17:29:13,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 1226 transitions, 15837 flow [2022-11-25 17:29:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:29:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 17:29:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4023 transitions. [2022-11-25 17:29:13,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5701530612244898 [2022-11-25 17:29:13,726 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4023 transitions. [2022-11-25 17:29:13,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4023 transitions. [2022-11-25 17:29:13,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:13,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4023 transitions. [2022-11-25 17:29:13,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 83.8125) internal successors, (4023), 48 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:13,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 147.0) internal successors, (7203), 49 states have internal predecessors, (7203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:13,752 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 147.0) internal successors, (7203), 49 states have internal predecessors, (7203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:13,753 INFO L175 Difference]: Start difference. First operand has 107 places, 264 transitions, 3960 flow. Second operand 48 states and 4023 transitions. [2022-11-25 17:29:13,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 1226 transitions, 15837 flow [2022-11-25 17:29:14,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 1226 transitions, 12945 flow, removed 1397 selfloop flow, removed 5 redundant places. [2022-11-25 17:29:14,293 INFO L231 Difference]: Finished difference. Result has 195 places, 904 transitions, 13613 flow [2022-11-25 17:29:14,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=13613, PETRI_PLACES=195, PETRI_TRANSITIONS=904} [2022-11-25 17:29:14,294 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 169 predicate places. [2022-11-25 17:29:14,294 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 904 transitions, 13613 flow [2022-11-25 17:29:14,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 74.08163265306122) internal successors, (3630), 49 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:14,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:14,296 INFO L209 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2022-11-25 17:29:14,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:14,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:29:14,503 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:14,503 INFO L85 PathProgramCache]: Analyzing trace with hash -718011933, now seen corresponding path program 5 times [2022-11-25 17:29:14,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:14,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867925897] [2022-11-25 17:29:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:14,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:16,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:16,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867925897] [2022-11-25 17:29:16,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867925897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:16,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727424766] [2022-11-25 17:29:16,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:29:16,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:16,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:16,660 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:16,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:29:16,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-25 17:29:16,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:16,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:29:16,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:16,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:20,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727424766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:20,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:20,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2022-11-25 17:29:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604395741] [2022-11-25 17:29:20,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:20,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-25 17:29:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-25 17:29:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-25 17:29:20,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-25 17:29:20,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 904 transitions, 13613 flow. Second operand has 97 states, 97 states have (on average 74.04123711340206) internal successors, (7182), 97 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:20,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:20,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-25 17:29:20,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:44,213 INFO L130 PetriNetUnfolder]: 27909/48999 cut-off events. [2022-11-25 17:29:44,213 INFO L131 PetriNetUnfolder]: For 6912627/6913193 co-relation queries the response was YES. [2022-11-25 17:29:44,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207445 conditions, 48999 events. 27909/48999 cut-off events. For 6912627/6913193 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 359446 event pairs, 3339 based on Foata normal form. 3004/52001 useless extension candidates. Maximal degree in co-relation 207349. Up to 13803 conditions per place. [2022-11-25 17:29:45,093 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 396 selfloop transitions, 3322 changer transitions 282/4002 dead transitions. [2022-11-25 17:29:45,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 4002 transitions, 56710 flow [2022-11-25 17:29:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-25 17:29:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-11-25 17:29:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8055 transitions. [2022-11-25 17:29:45,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5707908163265306 [2022-11-25 17:29:45,105 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8055 transitions. [2022-11-25 17:29:45,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8055 transitions. [2022-11-25 17:29:45,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:45,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8055 transitions. [2022-11-25 17:29:45,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 83.90625) internal successors, (8055), 96 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:45,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 147.0) internal successors, (14259), 97 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:45,146 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 147.0) internal successors, (14259), 97 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:45,146 INFO L175 Difference]: Start difference. First operand has 195 places, 904 transitions, 13613 flow. Second operand 96 states and 8055 transitions. [2022-11-25 17:29:45,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 4002 transitions, 56710 flow [2022-11-25 17:29:49,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 4002 transitions, 45494 flow, removed 5417 selfloop flow, removed 11 redundant places. [2022-11-25 17:29:49,520 INFO L231 Difference]: Finished difference. Result has 373 places, 3344 transitions, 49938 flow [2022-11-25 17:29:49,521 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=12379, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=49938, PETRI_PLACES=373, PETRI_TRANSITIONS=3344} [2022-11-25 17:29:49,522 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 347 predicate places. [2022-11-25 17:29:49,522 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 3344 transitions, 49938 flow [2022-11-25 17:29:49,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 74.04123711340206) internal successors, (7182), 97 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:49,525 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:49,525 INFO L209 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2022-11-25 17:29:49,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 17:29:49,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:29:49,732 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 17:29:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:49,733 INFO L85 PathProgramCache]: Analyzing trace with hash -712386845, now seen corresponding path program 6 times [2022-11-25 17:29:49,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:49,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773042603] [2022-11-25 17:29:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:49,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:56,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:56,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773042603] [2022-11-25 17:29:56,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773042603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:56,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186170041] [2022-11-25 17:29:56,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:29:56,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:56,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:56,460 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:56,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bc0456e-d77f-4fe1-9bc3-fe1d6d1c179f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:29:56,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2022-11-25 17:29:56,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 17:29:56,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:57,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:08,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186170041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:08,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:08,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2022-11-25 17:30:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222407159] [2022-11-25 17:30:08,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:08,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-25 17:30:08,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-25 17:30:08,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-25 17:30:08,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 147 [2022-11-25 17:30:08,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 3344 transitions, 49938 flow. Second operand has 193 states, 193 states have (on average 74.02072538860104) internal successors, (14286), 193 states have internal predecessors, (14286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:08,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:08,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 147 [2022-11-25 17:30:08,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand