./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro --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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- 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-8393723 [2022-11-18 20:31:25,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:31:25,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:31:25,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:31:25,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:31:25,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:31:25,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:31:25,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:31:25,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:31:25,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:31:25,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:31:25,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:31:25,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:31:25,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:31:25,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:31:25,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:31:25,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:31:25,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:31:25,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:31:25,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:31:25,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:31:25,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:31:25,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:31:25,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:31:25,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:31:25,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:31:25,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:31:25,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:31:25,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:31:25,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:31:25,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:31:25,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:31:25,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:31:25,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:31:25,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:31:25,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:31:25,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:31:25,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:31:25,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:31:25,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:31:25,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:31:25,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 20:31:25,977 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:31:25,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:31:25,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:31:25,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:31:25,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:31:25,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:31:25,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:31:25,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:31:25,982 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:31:25,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:31:25,983 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:31:25,984 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:31:25,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:31:25,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:31:25,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:31:25,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:31:25,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:31:25,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:31:25,985 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 20:31:25,985 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:31:25,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:31:25,986 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:31:25,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:31:25,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:31:25,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:31:25,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:31:25,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:31:25,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:31:25,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:31:25,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:31:25,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:31:25,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:31:25,989 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:31:25,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:31:25,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:31:25,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-11-18 20:31:26,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:31:26,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:31:26,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:31:26,369 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:31:26,370 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:31:26,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-18 20:31:26,460 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/data/f54b8c7ba/30ecaec197564547b65e5709de2bda54/FLAG10fe230f7 [2022-11-18 20:31:27,123 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:31:27,124 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-18 20:31:27,139 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/data/f54b8c7ba/30ecaec197564547b65e5709de2bda54/FLAG10fe230f7 [2022-11-18 20:31:27,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/data/f54b8c7ba/30ecaec197564547b65e5709de2bda54 [2022-11-18 20:31:27,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:31:27,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:31:27,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:31:27,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:31:27,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:31:27,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c122970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27, skipping insertion in model container [2022-11-18 20:31:27,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:31:27,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:31:27,805 WARN L234 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_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-18 20:31:27,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:31:27,821 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:31:27,869 WARN L234 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_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-18 20:31:27,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:31:27,890 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:31:27,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27 WrapperNode [2022-11-18 20:31:27,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:31:27,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:31:27,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:31:27,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:31:27,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,950 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-18 20:31:27,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:31:27,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:31:27,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:31:27,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:31:27,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,976 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:31:27,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:31:27,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:31:27,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:31:27,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (1/1) ... [2022-11-18 20:31:27,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:31:28,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:28,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:31:28,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:31:28,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:31:28,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:31:28,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:31:28,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:31:28,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:31:28,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:31:28,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:31:28,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:31:28,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:31:28,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:31:28,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:31:28,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:31:28,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:31:28,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:31:28,079 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:31:28,261 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:31:28,264 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:31:28,567 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:31:28,704 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:31:28,705 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:31:28,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:31:28 BoogieIcfgContainer [2022-11-18 20:31:28,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:31:28,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:31:28,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:31:28,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:31:28,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:31:27" (1/3) ... [2022-11-18 20:31:28,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577dbe81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:31:28, skipping insertion in model container [2022-11-18 20:31:28,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:27" (2/3) ... [2022-11-18 20:31:28,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577dbe81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:31:28, skipping insertion in model container [2022-11-18 20:31:28,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:31:28" (3/3) ... [2022-11-18 20:31:28,720 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-11-18 20:31:28,730 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:31:28,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:31:28,743 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-18 20:31:28,744 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:31:28,861 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:31:28,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 214 flow [2022-11-18 20:31:29,029 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2022-11-18 20:31:29,034 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:31:29,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-11-18 20:31:29,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 99 transitions, 214 flow [2022-11-18 20:31:29,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 79 transitions, 170 flow [2022-11-18 20:31:29,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:31:29,084 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;@de0734, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:31:29,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-18 20:31:29,124 INFO L130 PetriNetUnfolder]: 2/42 cut-off events. [2022-11-18 20:31:29,129 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:31:29,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:29,130 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:29,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1185055160, now seen corresponding path program 1 times [2022-11-18 20:31:29,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:29,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073722009] [2022-11-18 20:31:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:29,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:29,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073722009] [2022-11-18 20:31:29,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073722009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:29,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:29,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:31:29,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623878006] [2022-11-18 20:31:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:29,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:31:29,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:31:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:29,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-18 20:31:29,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:29,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:29,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-18 20:31:29,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:29,851 INFO L130 PetriNetUnfolder]: 28/160 cut-off events. [2022-11-18 20:31:29,851 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-18 20:31:29,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 160 events. 28/160 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 11 based on Foata normal form. 16/137 useless extension candidates. Maximal degree in co-relation 129. Up to 47 conditions per place. [2022-11-18 20:31:29,855 INFO L137 encePairwiseOnDemand]: 88/99 looper letters, 15 selfloop transitions, 2 changer transitions 1/80 dead transitions. [2022-11-18 20:31:29,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 215 flow [2022-11-18 20:31:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:31:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:31:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2022-11-18 20:31:29,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9057239057239057 [2022-11-18 20:31:29,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2022-11-18 20:31:29,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2022-11-18 20:31:29,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:29,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2022-11-18 20:31:29,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:29,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:29,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:29,896 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 170 flow. Second operand 3 states and 269 transitions. [2022-11-18 20:31:29,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 215 flow [2022-11-18 20:31:29,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 201 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:31:29,905 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 172 flow [2022-11-18 20:31:29,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2022-11-18 20:31:29,913 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2022-11-18 20:31:29,913 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 172 flow [2022-11-18 20:31:29,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:29,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:29,914 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:29,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:31:29,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash 671686075, now seen corresponding path program 1 times [2022-11-18 20:31:29,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:29,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571054422] [2022-11-18 20:31:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:29,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:30,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:30,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571054422] [2022-11-18 20:31:30,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571054422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:30,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:30,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:31:30,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126959074] [2022-11-18 20:31:30,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:30,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:31:30,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:31:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:31:30,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-18 20:31:30,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:30,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-18 20:31:30,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:30,251 INFO L130 PetriNetUnfolder]: 171/416 cut-off events. [2022-11-18 20:31:30,252 INFO L131 PetriNetUnfolder]: For 43/50 co-relation queries the response was YES. [2022-11-18 20:31:30,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 416 events. 171/416 cut-off events. For 43/50 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2012 event pairs, 26 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 693. Up to 205 conditions per place. [2022-11-18 20:31:30,259 INFO L137 encePairwiseOnDemand]: 93/99 looper letters, 42 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2022-11-18 20:31:30,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 335 flow [2022-11-18 20:31:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:31:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:31:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2022-11-18 20:31:30,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8242424242424242 [2022-11-18 20:31:30,264 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2022-11-18 20:31:30,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2022-11-18 20:31:30,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:30,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2022-11-18 20:31:30,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,272 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,272 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 172 flow. Second operand 5 states and 408 transitions. [2022-11-18 20:31:30,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 335 flow [2022-11-18 20:31:30,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:31:30,277 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 200 flow [2022-11-18 20:31:30,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2022-11-18 20:31:30,278 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2022-11-18 20:31:30,279 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 200 flow [2022-11-18 20:31:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:30,280 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:30,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:31:30,281 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:30,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1121832319, now seen corresponding path program 1 times [2022-11-18 20:31:30,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:30,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226882799] [2022-11-18 20:31:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:30,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:30,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:30,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226882799] [2022-11-18 20:31:30,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226882799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:30,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9232344] [2022-11-18 20:31:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:30,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:30,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:30,413 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:30,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:31:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:30,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:31:30,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:30,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:30,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9232344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:30,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:30,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-18 20:31:30,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716780174] [2022-11-18 20:31:30,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:30,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:31:30,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:30,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:31:30,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:31:30,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-18 20:31:30,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:30,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-18 20:31:30,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:31,089 INFO L130 PetriNetUnfolder]: 100/480 cut-off events. [2022-11-18 20:31:31,090 INFO L131 PetriNetUnfolder]: For 82/109 co-relation queries the response was YES. [2022-11-18 20:31:31,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 480 events. 100/480 cut-off events. For 82/109 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2448 event pairs, 5 based on Foata normal form. 6/391 useless extension candidates. Maximal degree in co-relation 649. Up to 101 conditions per place. [2022-11-18 20:31:31,096 INFO L137 encePairwiseOnDemand]: 91/99 looper letters, 31 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2022-11-18 20:31:31,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 411 flow [2022-11-18 20:31:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:31:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:31:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2022-11-18 20:31:31,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8932178932178932 [2022-11-18 20:31:31,100 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2022-11-18 20:31:31,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2022-11-18 20:31:31,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:31,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2022-11-18 20:31:31,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:31,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:31,108 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:31,109 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 200 flow. Second operand 7 states and 619 transitions. [2022-11-18 20:31:31,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 411 flow [2022-11-18 20:31:31,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:31:31,114 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 357 flow [2022-11-18 20:31:31,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2022-11-18 20:31:31,116 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2022-11-18 20:31:31,116 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 357 flow [2022-11-18 20:31:31,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:31,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:31,118 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:31,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:31,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:31,325 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:31,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1121832320, now seen corresponding path program 1 times [2022-11-18 20:31:31,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:31,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982287653] [2022-11-18 20:31:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:31,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:31,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982287653] [2022-11-18 20:31:31,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982287653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:31,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715151994] [2022-11-18 20:31:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:31,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:31,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:31,442 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:31,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:31:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:31,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:31:31,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:31,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:31,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715151994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:31,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:31:31,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-18 20:31:31,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116425608] [2022-11-18 20:31:31,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:31,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:31:31,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:31,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:31:31,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:31:31,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-18 20:31:31,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 357 flow. Second operand has 4 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) [2022-11-18 20:31:31,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:31,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-18 20:31:31,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:31,770 INFO L130 PetriNetUnfolder]: 98/552 cut-off events. [2022-11-18 20:31:31,770 INFO L131 PetriNetUnfolder]: For 926/1209 co-relation queries the response was YES. [2022-11-18 20:31:31,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 552 events. 98/552 cut-off events. For 926/1209 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3106 event pairs, 2 based on Foata normal form. 39/513 useless extension candidates. Maximal degree in co-relation 759. Up to 100 conditions per place. [2022-11-18 20:31:31,778 INFO L137 encePairwiseOnDemand]: 91/99 looper letters, 16 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2022-11-18 20:31:31,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 98 transitions, 461 flow [2022-11-18 20:31:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:31:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 20:31:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2022-11-18 20:31:31,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2022-11-18 20:31:31,780 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 342 transitions. [2022-11-18 20:31:31,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 342 transitions. [2022-11-18 20:31:31,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:31,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 342 transitions. [2022-11-18 20:31:31,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:31,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:31,784 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:31,784 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 357 flow. Second operand 4 states and 342 transitions. [2022-11-18 20:31:31,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 98 transitions, 461 flow [2022-11-18 20:31:31,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 447 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-18 20:31:31,792 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 453 flow [2022-11-18 20:31:31,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2022-11-18 20:31:31,793 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2022-11-18 20:31:31,794 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 453 flow [2022-11-18 20:31:31,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-18 20:31:31,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:31,794 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:31,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:32,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:32,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1250225610, now seen corresponding path program 1 times [2022-11-18 20:31:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:32,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556517758] [2022-11-18 20:31:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:32,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:32,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556517758] [2022-11-18 20:31:32,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556517758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:32,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:32,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:31:32,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834846476] [2022-11-18 20:31:32,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:32,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:31:32,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:31:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:32,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 99 [2022-11-18 20:31:32,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:32,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:32,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 99 [2022-11-18 20:31:32,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:32,361 INFO L130 PetriNetUnfolder]: 143/729 cut-off events. [2022-11-18 20:31:32,362 INFO L131 PetriNetUnfolder]: For 2120/2643 co-relation queries the response was YES. [2022-11-18 20:31:32,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1831 conditions, 729 events. 143/729 cut-off events. For 2120/2643 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4748 event pairs, 44 based on Foata normal form. 17/592 useless extension candidates. Maximal degree in co-relation 1143. Up to 229 conditions per place. [2022-11-18 20:31:32,372 INFO L137 encePairwiseOnDemand]: 95/99 looper letters, 42 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2022-11-18 20:31:32,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 666 flow [2022-11-18 20:31:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:31:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:31:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-18 20:31:32,374 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8754208754208754 [2022-11-18 20:31:32,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-18 20:31:32,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-18 20:31:32,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:32,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-18 20:31:32,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:32,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:32,402 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:32,402 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 453 flow. Second operand 3 states and 260 transitions. [2022-11-18 20:31:32,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 666 flow [2022-11-18 20:31:32,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 110 transitions, 605 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-11-18 20:31:32,410 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 479 flow [2022-11-18 20:31:32,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2022-11-18 20:31:32,417 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 19 predicate places. [2022-11-18 20:31:32,417 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 479 flow [2022-11-18 20:31:32,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:32,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:32,420 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:31:32,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 44078018, now seen corresponding path program 1 times [2022-11-18 20:31:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551967280] [2022-11-18 20:31:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:32,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551967280] [2022-11-18 20:31:32,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551967280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:32,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690601111] [2022-11-18 20:31:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:32,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:32,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:32,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:32,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:31:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:32,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:31:32,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:32,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:32,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690601111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:32,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:32,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 20:31:32,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914232000] [2022-11-18 20:31:32,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:32,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:31:32,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:31:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:31:32,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-18 20:31:32,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 479 flow. Second operand has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:32,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:32,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-18 20:31:32,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:33,718 INFO L130 PetriNetUnfolder]: 730/2013 cut-off events. [2022-11-18 20:31:33,719 INFO L131 PetriNetUnfolder]: For 5108/5158 co-relation queries the response was YES. [2022-11-18 20:31:33,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7099 conditions, 2013 events. 730/2013 cut-off events. For 5108/5158 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 14206 event pairs, 31 based on Foata normal form. 104/1737 useless extension candidates. Maximal degree in co-relation 5363. Up to 633 conditions per place. [2022-11-18 20:31:33,747 INFO L137 encePairwiseOnDemand]: 92/99 looper letters, 277 selfloop transitions, 18 changer transitions 0/348 dead transitions. [2022-11-18 20:31:33,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 348 transitions, 3356 flow [2022-11-18 20:31:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:31:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:31:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1430 transitions. [2022-11-18 20:31:33,759 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8024691358024691 [2022-11-18 20:31:33,759 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1430 transitions. [2022-11-18 20:31:33,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1430 transitions. [2022-11-18 20:31:33,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:33,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1430 transitions. [2022-11-18 20:31:33,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 79.44444444444444) internal successors, (1430), 18 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:33,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 99.0) internal successors, (1881), 19 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:33,809 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 99.0) internal successors, (1881), 19 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:33,809 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 479 flow. Second operand 18 states and 1430 transitions. [2022-11-18 20:31:33,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 348 transitions, 3356 flow [2022-11-18 20:31:33,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 348 transitions, 3333 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:31:33,831 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 580 flow [2022-11-18 20:31:33,832 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=580, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2022-11-18 20:31:33,833 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 39 predicate places. [2022-11-18 20:31:33,833 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 580 flow [2022-11-18 20:31:33,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:33,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:33,834 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:33,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:34,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:31:34,041 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:34,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1366418868, now seen corresponding path program 1 times [2022-11-18 20:31:34,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:34,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045496446] [2022-11-18 20:31:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:34,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:34,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045496446] [2022-11-18 20:31:34,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045496446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:34,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98315847] [2022-11-18 20:31:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:34,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:34,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:34,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:34,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:31:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:34,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:31:34,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:34,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:34,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98315847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:34,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:31:34,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 20:31:34,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012314991] [2022-11-18 20:31:34,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:34,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:31:34,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:34,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:31:34,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:31:34,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-18 20:31:34,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 580 flow. Second operand has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:34,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:34,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-18 20:31:34,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:34,847 INFO L130 PetriNetUnfolder]: 655/1819 cut-off events. [2022-11-18 20:31:34,847 INFO L131 PetriNetUnfolder]: For 5187/5272 co-relation queries the response was YES. [2022-11-18 20:31:34,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 1819 events. 655/1819 cut-off events. For 5187/5272 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12603 event pairs, 101 based on Foata normal form. 134/1599 useless extension candidates. Maximal degree in co-relation 5717. Up to 641 conditions per place. [2022-11-18 20:31:34,871 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 87 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2022-11-18 20:31:34,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 1130 flow [2022-11-18 20:31:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:31:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:31:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 553 transitions. [2022-11-18 20:31:34,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2022-11-18 20:31:34,874 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 553 transitions. [2022-11-18 20:31:34,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 553 transitions. [2022-11-18 20:31:34,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:34,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 553 transitions. [2022-11-18 20:31:34,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:34,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:34,879 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:34,879 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 580 flow. Second operand 7 states and 553 transitions. [2022-11-18 20:31:34,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 1130 flow [2022-11-18 20:31:34,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 151 transitions, 1098 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-18 20:31:34,900 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 543 flow [2022-11-18 20:31:34,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=543, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2022-11-18 20:31:34,901 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 35 predicate places. [2022-11-18 20:31:34,902 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 543 flow [2022-11-18 20:31:34,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:34,902 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:34,903 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:34,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 20:31:35,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:35,110 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1505486264, now seen corresponding path program 1 times [2022-11-18 20:31:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:35,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642211959] [2022-11-18 20:31:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:35,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:35,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:35,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642211959] [2022-11-18 20:31:35,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642211959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62765933] [2022-11-18 20:31:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:35,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:35,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:35,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:31:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:35,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:31:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:35,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:35,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62765933] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:35,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:31:35,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-11-18 20:31:35,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527432271] [2022-11-18 20:31:35,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:35,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:31:35,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:35,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:31:35,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:31:35,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 99 [2022-11-18 20:31:35,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 543 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:35,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:35,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 99 [2022-11-18 20:31:35,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:35,884 INFO L130 PetriNetUnfolder]: 220/1082 cut-off events. [2022-11-18 20:31:35,884 INFO L131 PetriNetUnfolder]: For 2446/3042 co-relation queries the response was YES. [2022-11-18 20:31:35,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 1082 events. 220/1082 cut-off events. For 2446/3042 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8211 event pairs, 105 based on Foata normal form. 26/858 useless extension candidates. Maximal degree in co-relation 2092. Up to 455 conditions per place. [2022-11-18 20:31:35,896 INFO L137 encePairwiseOnDemand]: 95/99 looper letters, 38 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2022-11-18 20:31:35,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 112 transitions, 640 flow [2022-11-18 20:31:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:31:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 20:31:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2022-11-18 20:31:35,930 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8257575757575758 [2022-11-18 20:31:35,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2022-11-18 20:31:35,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2022-11-18 20:31:35,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:35,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2022-11-18 20:31:35,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:35,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:35,934 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:35,934 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 543 flow. Second operand 4 states and 327 transitions. [2022-11-18 20:31:35,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 112 transitions, 640 flow [2022-11-18 20:31:35,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 112 transitions, 626 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:31:35,943 INFO L231 Difference]: Finished difference. Result has 115 places, 106 transitions, 520 flow [2022-11-18 20:31:35,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=115, PETRI_TRANSITIONS=106} [2022-11-18 20:31:35,945 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 34 predicate places. [2022-11-18 20:31:35,945 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 106 transitions, 520 flow [2022-11-18 20:31:35,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:35,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:35,946 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:35,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:36,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:36,158 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:36,159 INFO L85 PathProgramCache]: Analyzing trace with hash -7855593, now seen corresponding path program 1 times [2022-11-18 20:31:36,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:36,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454308463] [2022-11-18 20:31:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:36,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:36,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:36,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454308463] [2022-11-18 20:31:36,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454308463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:36,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227971860] [2022-11-18 20:31:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:36,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:36,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:36,390 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:36,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:31:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:36,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:31:36,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:36,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:36,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227971860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:36,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:36,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-18 20:31:36,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252059755] [2022-11-18 20:31:36,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:36,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:31:36,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:36,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:31:36,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:31:36,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 99 [2022-11-18 20:31:36,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 106 transitions, 520 flow. Second operand has 8 states, 8 states have (on average 70.625) internal successors, (565), 8 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:36,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:36,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 99 [2022-11-18 20:31:36,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:37,116 INFO L130 PetriNetUnfolder]: 250/1331 cut-off events. [2022-11-18 20:31:37,116 INFO L131 PetriNetUnfolder]: For 2631/3024 co-relation queries the response was YES. [2022-11-18 20:31:37,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3133 conditions, 1331 events. 250/1331 cut-off events. For 2631/3024 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10814 event pairs, 64 based on Foata normal form. 75/1144 useless extension candidates. Maximal degree in co-relation 2909. Up to 237 conditions per place. [2022-11-18 20:31:37,131 INFO L137 encePairwiseOnDemand]: 90/99 looper letters, 64 selfloop transitions, 20 changer transitions 0/145 dead transitions. [2022-11-18 20:31:37,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 145 transitions, 879 flow [2022-11-18 20:31:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:31:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 20:31:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 592 transitions. [2022-11-18 20:31:37,135 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7474747474747475 [2022-11-18 20:31:37,135 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 592 transitions. [2022-11-18 20:31:37,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 592 transitions. [2022-11-18 20:31:37,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:37,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 592 transitions. [2022-11-18 20:31:37,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:37,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 99.0) internal successors, (891), 9 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:37,141 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 99.0) internal successors, (891), 9 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:37,141 INFO L175 Difference]: Start difference. First operand has 115 places, 106 transitions, 520 flow. Second operand 8 states and 592 transitions. [2022-11-18 20:31:37,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 145 transitions, 879 flow [2022-11-18 20:31:37,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 145 transitions, 865 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-18 20:31:37,154 INFO L231 Difference]: Finished difference. Result has 121 places, 108 transitions, 582 flow [2022-11-18 20:31:37,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=582, PETRI_PLACES=121, PETRI_TRANSITIONS=108} [2022-11-18 20:31:37,156 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 40 predicate places. [2022-11-18 20:31:37,156 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 108 transitions, 582 flow [2022-11-18 20:31:37,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.625) internal successors, (565), 8 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:37,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:37,157 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:37,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:37,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:31:37,365 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1688134863, now seen corresponding path program 1 times [2022-11-18 20:31:37,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:37,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755859206] [2022-11-18 20:31:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:37,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:37,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:37,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755859206] [2022-11-18 20:31:37,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755859206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:37,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:37,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:31:37,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56820033] [2022-11-18 20:31:37,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:37,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:31:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:31:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:31:37,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2022-11-18 20:31:37,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 108 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:37,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:37,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2022-11-18 20:31:37,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:38,136 INFO L130 PetriNetUnfolder]: 701/2301 cut-off events. [2022-11-18 20:31:38,136 INFO L131 PetriNetUnfolder]: For 5053/5077 co-relation queries the response was YES. [2022-11-18 20:31:38,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6573 conditions, 2301 events. 701/2301 cut-off events. For 5053/5077 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 17746 event pairs, 456 based on Foata normal form. 24/2155 useless extension candidates. Maximal degree in co-relation 6240. Up to 1451 conditions per place. [2022-11-18 20:31:38,166 INFO L137 encePairwiseOnDemand]: 93/99 looper letters, 63 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2022-11-18 20:31:38,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 118 transitions, 791 flow [2022-11-18 20:31:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:31:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 20:31:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 377 transitions. [2022-11-18 20:31:38,169 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6346801346801347 [2022-11-18 20:31:38,169 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 377 transitions. [2022-11-18 20:31:38,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 377 transitions. [2022-11-18 20:31:38,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:38,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 377 transitions. [2022-11-18 20:31:38,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:38,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:38,173 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:38,173 INFO L175 Difference]: Start difference. First operand has 121 places, 108 transitions, 582 flow. Second operand 6 states and 377 transitions. [2022-11-18 20:31:38,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 118 transitions, 791 flow [2022-11-18 20:31:38,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 775 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-18 20:31:38,192 INFO L231 Difference]: Finished difference. Result has 124 places, 108 transitions, 582 flow [2022-11-18 20:31:38,193 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=582, PETRI_PLACES=124, PETRI_TRANSITIONS=108} [2022-11-18 20:31:38,193 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2022-11-18 20:31:38,194 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 108 transitions, 582 flow [2022-11-18 20:31:38,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:38,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:38,194 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:38,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:31:38,195 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash -825592294, now seen corresponding path program 1 times [2022-11-18 20:31:38,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:38,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840377795] [2022-11-18 20:31:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:38,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:38,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:38,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840377795] [2022-11-18 20:31:38,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840377795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:38,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983924995] [2022-11-18 20:31:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:38,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:38,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:38,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:38,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:31:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:31:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:39,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:39,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983924995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:39,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:31:39,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2022-11-18 20:31:39,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705213928] [2022-11-18 20:31:39,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:39,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:31:39,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:39,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:31:39,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:31:39,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2022-11-18 20:31:39,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 108 transitions, 582 flow. Second operand has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:39,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:39,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2022-11-18 20:31:39,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:39,611 INFO L130 PetriNetUnfolder]: 448/1819 cut-off events. [2022-11-18 20:31:39,611 INFO L131 PetriNetUnfolder]: For 3018/3040 co-relation queries the response was YES. [2022-11-18 20:31:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4834 conditions, 1819 events. 448/1819 cut-off events. For 3018/3040 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 14721 event pairs, 295 based on Foata normal form. 22/1746 useless extension candidates. Maximal degree in co-relation 4544. Up to 980 conditions per place. [2022-11-18 20:31:39,629 INFO L137 encePairwiseOnDemand]: 92/99 looper letters, 43 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2022-11-18 20:31:39,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 107 transitions, 678 flow [2022-11-18 20:31:39,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:31:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:31:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 425 transitions. [2022-11-18 20:31:39,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6132756132756133 [2022-11-18 20:31:39,632 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 425 transitions. [2022-11-18 20:31:39,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 425 transitions. [2022-11-18 20:31:39,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:39,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 425 transitions. [2022-11-18 20:31:39,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.714285714285715) internal successors, (425), 7 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:39,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:39,637 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:39,637 INFO L175 Difference]: Start difference. First operand has 124 places, 108 transitions, 582 flow. Second operand 7 states and 425 transitions. [2022-11-18 20:31:39,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 107 transitions, 678 flow [2022-11-18 20:31:39,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 107 transitions, 668 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:31:39,653 INFO L231 Difference]: Finished difference. Result has 124 places, 107 transitions, 582 flow [2022-11-18 20:31:39,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=582, PETRI_PLACES=124, PETRI_TRANSITIONS=107} [2022-11-18 20:31:39,654 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2022-11-18 20:31:39,654 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 107 transitions, 582 flow [2022-11-18 20:31:39,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:39,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:39,655 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:39,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:39,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:31:39,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:39,862 INFO L85 PathProgramCache]: Analyzing trace with hash 176442899, now seen corresponding path program 1 times [2022-11-18 20:31:39,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:39,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100560136] [2022-11-18 20:31:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:39,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:39,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:39,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100560136] [2022-11-18 20:31:39,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100560136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:39,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012696905] [2022-11-18 20:31:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:39,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:39,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:39,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:40,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:31:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:31:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:40,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:40,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012696905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:40,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:40,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-18 20:31:40,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221078712] [2022-11-18 20:31:40,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:40,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:31:40,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:31:40,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:31:40,447 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2022-11-18 20:31:40,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 107 transitions, 582 flow. Second operand has 15 states, 15 states have (on average 64.86666666666666) internal successors, (973), 15 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:40,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:40,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2022-11-18 20:31:40,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:41,340 INFO L130 PetriNetUnfolder]: 822/2661 cut-off events. [2022-11-18 20:31:41,340 INFO L131 PetriNetUnfolder]: For 5882/5882 co-relation queries the response was YES. [2022-11-18 20:31:41,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7685 conditions, 2661 events. 822/2661 cut-off events. For 5882/5882 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 21071 event pairs, 183 based on Foata normal form. 37/2682 useless extension candidates. Maximal degree in co-relation 7616. Up to 962 conditions per place. [2022-11-18 20:31:41,365 INFO L137 encePairwiseOnDemand]: 88/99 looper letters, 114 selfloop transitions, 23 changer transitions 17/200 dead transitions. [2022-11-18 20:31:41,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 200 transitions, 1584 flow [2022-11-18 20:31:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:31:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 20:31:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 939 transitions. [2022-11-18 20:31:41,369 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6774891774891775 [2022-11-18 20:31:41,369 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 939 transitions. [2022-11-18 20:31:41,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 939 transitions. [2022-11-18 20:31:41,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:41,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 939 transitions. [2022-11-18 20:31:41,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 67.07142857142857) internal successors, (939), 14 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:41,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 99.0) internal successors, (1485), 15 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:41,378 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 99.0) internal successors, (1485), 15 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:41,378 INFO L175 Difference]: Start difference. First operand has 124 places, 107 transitions, 582 flow. Second operand 14 states and 939 transitions. [2022-11-18 20:31:41,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 200 transitions, 1584 flow [2022-11-18 20:31:41,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 1573 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:31:41,401 INFO L231 Difference]: Finished difference. Result has 136 places, 118 transitions, 791 flow [2022-11-18 20:31:41,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=791, PETRI_PLACES=136, PETRI_TRANSITIONS=118} [2022-11-18 20:31:41,402 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 55 predicate places. [2022-11-18 20:31:41,403 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 118 transitions, 791 flow [2022-11-18 20:31:41,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.86666666666666) internal successors, (973), 15 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:41,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:41,404 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:41,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:41,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:31:41,610 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:41,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1218228744, now seen corresponding path program 2 times [2022-11-18 20:31:41,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:41,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69489180] [2022-11-18 20:31:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:41,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:41,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:41,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69489180] [2022-11-18 20:31:41,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69489180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:41,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379899352] [2022-11-18 20:31:41,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:31:41,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:41,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:41,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:41,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:31:41,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:31:41,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:41,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:31:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:41,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:42,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379899352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:42,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:42,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 20:31:42,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970883591] [2022-11-18 20:31:42,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:42,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:31:42,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:31:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:31:42,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-18 20:31:42,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 118 transitions, 791 flow. Second operand has 13 states, 13 states have (on average 81.3076923076923) internal successors, (1057), 13 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:42,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:42,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-18 20:31:42,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:42,671 INFO L130 PetriNetUnfolder]: 228/1624 cut-off events. [2022-11-18 20:31:42,671 INFO L131 PetriNetUnfolder]: For 8007/8439 co-relation queries the response was YES. [2022-11-18 20:31:42,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4841 conditions, 1624 events. 228/1624 cut-off events. For 8007/8439 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 11879 event pairs, 11 based on Foata normal form. 285/1885 useless extension candidates. Maximal degree in co-relation 4776. Up to 194 conditions per place. [2022-11-18 20:31:42,694 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 47 selfloop transitions, 78 changer transitions 0/206 dead transitions. [2022-11-18 20:31:42,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 206 transitions, 1993 flow [2022-11-18 20:31:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:31:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 20:31:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1110 transitions. [2022-11-18 20:31:42,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8624708624708625 [2022-11-18 20:31:42,699 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1110 transitions. [2022-11-18 20:31:42,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1110 transitions. [2022-11-18 20:31:42,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:42,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1110 transitions. [2022-11-18 20:31:42,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 85.38461538461539) internal successors, (1110), 13 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:42,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:42,707 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:42,707 INFO L175 Difference]: Start difference. First operand has 136 places, 118 transitions, 791 flow. Second operand 13 states and 1110 transitions. [2022-11-18 20:31:42,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 206 transitions, 1993 flow [2022-11-18 20:31:42,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 206 transitions, 1978 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-11-18 20:31:42,733 INFO L231 Difference]: Finished difference. Result has 150 places, 186 transitions, 2065 flow [2022-11-18 20:31:42,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2065, PETRI_PLACES=150, PETRI_TRANSITIONS=186} [2022-11-18 20:31:42,735 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 69 predicate places. [2022-11-18 20:31:42,735 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 186 transitions, 2065 flow [2022-11-18 20:31:42,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 81.3076923076923) internal successors, (1057), 13 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:42,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:42,736 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:42,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:31:42,942 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1808259579, now seen corresponding path program 2 times [2022-11-18 20:31:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:42,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328414785] [2022-11-18 20:31:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:42,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:43,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328414785] [2022-11-18 20:31:43,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328414785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:43,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195911913] [2022-11-18 20:31:43,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:31:43,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:43,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:43,181 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:43,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:31:43,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:31:43,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:43,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:31:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:31:43,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:31:43,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195911913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:43,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:43,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-18 20:31:43,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458441540] [2022-11-18 20:31:43,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:43,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:31:43,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:43,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:31:43,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:31:43,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2022-11-18 20:31:43,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 186 transitions, 2065 flow. Second operand has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:43,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:43,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2022-11-18 20:31:43,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:44,941 INFO L130 PetriNetUnfolder]: 1088/3161 cut-off events. [2022-11-18 20:31:44,942 INFO L131 PetriNetUnfolder]: For 40131/40935 co-relation queries the response was YES. [2022-11-18 20:31:44,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15094 conditions, 3161 events. 1088/3161 cut-off events. For 40131/40935 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 22434 event pairs, 19 based on Foata normal form. 435/3591 useless extension candidates. Maximal degree in co-relation 15017. Up to 943 conditions per place. [2022-11-18 20:31:44,991 INFO L137 encePairwiseOnDemand]: 90/99 looper letters, 454 selfloop transitions, 25 changer transitions 6/536 dead transitions. [2022-11-18 20:31:44,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 536 transitions, 8265 flow [2022-11-18 20:31:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:31:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 20:31:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1450 transitions. [2022-11-18 20:31:44,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6657483930211203 [2022-11-18 20:31:44,997 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1450 transitions. [2022-11-18 20:31:44,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1450 transitions. [2022-11-18 20:31:45,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:45,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1450 transitions. [2022-11-18 20:31:45,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.9090909090909) internal successors, (1450), 22 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:45,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:45,016 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:45,016 INFO L175 Difference]: Start difference. First operand has 150 places, 186 transitions, 2065 flow. Second operand 22 states and 1450 transitions. [2022-11-18 20:31:45,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 536 transitions, 8265 flow [2022-11-18 20:31:45,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 536 transitions, 7623 flow, removed 298 selfloop flow, removed 6 redundant places. [2022-11-18 20:31:45,092 INFO L231 Difference]: Finished difference. Result has 165 places, 188 transitions, 1899 flow [2022-11-18 20:31:45,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1899, PETRI_PLACES=165, PETRI_TRANSITIONS=188} [2022-11-18 20:31:45,094 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 84 predicate places. [2022-11-18 20:31:45,094 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 188 transitions, 1899 flow [2022-11-18 20:31:45,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:45,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:45,095 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:45,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:45,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:31:45,301 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1008065624, now seen corresponding path program 3 times [2022-11-18 20:31:45,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:45,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572767528] [2022-11-18 20:31:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:45,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:45,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572767528] [2022-11-18 20:31:45,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572767528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326604363] [2022-11-18 20:31:45,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:31:45,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:45,628 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:45,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:31:45,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-18 20:31:45,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:45,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:31:45,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:45,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:46,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326604363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:46,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:46,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-18 20:31:46,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483125665] [2022-11-18 20:31:46,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:46,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:31:46,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:46,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:31:46,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:31:46,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-18 20:31:46,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 188 transitions, 1899 flow. Second operand has 25 states, 25 states have (on average 81.16) internal successors, (2029), 25 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:46,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:46,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-18 20:31:46,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:47,871 INFO L130 PetriNetUnfolder]: 566/4020 cut-off events. [2022-11-18 20:31:47,871 INFO L131 PetriNetUnfolder]: For 48273/49614 co-relation queries the response was YES. [2022-11-18 20:31:47,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12917 conditions, 4020 events. 566/4020 cut-off events. For 48273/49614 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 32655 event pairs, 11 based on Foata normal form. 903/4887 useless extension candidates. Maximal degree in co-relation 12845. Up to 516 conditions per place. [2022-11-18 20:31:47,921 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 73 selfloop transitions, 284 changer transitions 0/442 dead transitions. [2022-11-18 20:31:47,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 442 transitions, 5442 flow [2022-11-18 20:31:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:31:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 20:31:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2142 transitions. [2022-11-18 20:31:47,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8654545454545455 [2022-11-18 20:31:47,926 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2142 transitions. [2022-11-18 20:31:47,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2142 transitions. [2022-11-18 20:31:47,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:47,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2142 transitions. [2022-11-18 20:31:47,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 85.68) internal successors, (2142), 25 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:47,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:47,939 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:47,939 INFO L175 Difference]: Start difference. First operand has 165 places, 188 transitions, 1899 flow. Second operand 25 states and 2142 transitions. [2022-11-18 20:31:47,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 442 transitions, 5442 flow [2022-11-18 20:31:48,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 442 transitions, 5382 flow, removed 3 selfloop flow, removed 15 redundant places. [2022-11-18 20:31:48,020 INFO L231 Difference]: Finished difference. Result has 196 places, 398 transitions, 5843 flow [2022-11-18 20:31:48,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5843, PETRI_PLACES=196, PETRI_TRANSITIONS=398} [2022-11-18 20:31:48,022 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 115 predicate places. [2022-11-18 20:31:48,022 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 398 transitions, 5843 flow [2022-11-18 20:31:48,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.16) internal successors, (2029), 25 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:48,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:48,024 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:48,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:48,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:48,231 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:48,232 INFO L85 PathProgramCache]: Analyzing trace with hash -883355368, now seen corresponding path program 4 times [2022-11-18 20:31:48,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:48,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715994595] [2022-11-18 20:31:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:48,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:49,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715994595] [2022-11-18 20:31:49,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715994595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023521489] [2022-11-18 20:31:49,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:31:49,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:49,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:49,271 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:49,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:31:49,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:31:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:31:49,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:49,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:51,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023521489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:51,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:51,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-18 20:31:51,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306687801] [2022-11-18 20:31:51,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:51,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 20:31:51,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 20:31:51,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:31:51,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-18 20:31:51,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 398 transitions, 5843 flow. Second operand has 49 states, 49 states have (on average 81.08163265306122) internal successors, (3973), 49 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:51,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:51,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-18 20:31:51,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:55,908 INFO L130 PetriNetUnfolder]: 1423/10047 cut-off events. [2022-11-18 20:31:55,909 INFO L131 PetriNetUnfolder]: For 576294/581213 co-relation queries the response was YES. [2022-11-18 20:31:56,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33683 conditions, 10047 events. 1423/10047 cut-off events. For 576294/581213 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 87875 event pairs, 11 based on Foata normal form. 2927/12914 useless extension candidates. Maximal degree in co-relation 33589. Up to 1574 conditions per place. [2022-11-18 20:31:56,061 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 123 selfloop transitions, 996 changer transitions 0/1204 dead transitions. [2022-11-18 20:31:56,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1204 transitions, 19086 flow [2022-11-18 20:31:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 20:31:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-18 20:31:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4206 transitions. [2022-11-18 20:31:56,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8670377241805813 [2022-11-18 20:31:56,069 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4206 transitions. [2022-11-18 20:31:56,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4206 transitions. [2022-11-18 20:31:56,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:56,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4206 transitions. [2022-11-18 20:31:56,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 85.83673469387755) internal successors, (4206), 49 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:56,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 99.0) internal successors, (4950), 50 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:56,093 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 99.0) internal successors, (4950), 50 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:56,093 INFO L175 Difference]: Start difference. First operand has 196 places, 398 transitions, 5843 flow. Second operand 49 states and 4206 transitions. [2022-11-18 20:31:56,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1204 transitions, 19086 flow [2022-11-18 20:31:56,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1204 transitions, 16354 flow, removed 1327 selfloop flow, removed 5 redundant places. [2022-11-18 20:31:56,551 INFO L231 Difference]: Finished difference. Result has 285 places, 1112 transitions, 18163 flow [2022-11-18 20:31:56,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18163, PETRI_PLACES=285, PETRI_TRANSITIONS=1112} [2022-11-18 20:31:56,552 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 204 predicate places. [2022-11-18 20:31:56,553 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1112 transitions, 18163 flow [2022-11-18 20:31:56,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 81.08163265306122) internal successors, (3973), 49 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:56,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:56,555 INFO L209 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:56,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:56,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:31:56,762 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:31:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1346381160, now seen corresponding path program 5 times [2022-11-18 20:31:56,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:56,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391207375] [2022-11-18 20:31:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:56,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:00,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391207375] [2022-11-18 20:32:00,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391207375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373327082] [2022-11-18 20:32:00,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:32:00,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:00,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:00,403 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:00,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:32:00,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-18 20:32:00,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:32:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 20:32:00,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:01,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:05,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373327082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:32:05,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:32:05,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-18 20:32:05,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741963138] [2022-11-18 20:32:05,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:32:05,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-18 20:32:05,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-18 20:32:05,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-18 20:32:06,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-18 20:32:06,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1112 transitions, 18163 flow. Second operand has 97 states, 97 states have (on average 81.04123711340206) internal successors, (7861), 97 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:06,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:06,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-18 20:32:06,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:27,967 INFO L130 PetriNetUnfolder]: 4297/29347 cut-off events. [2022-11-18 20:32:27,967 INFO L131 PetriNetUnfolder]: For 5757002/5776144 co-relation queries the response was YES. [2022-11-18 20:32:28,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100456 conditions, 29347 events. 4297/29347 cut-off events. For 5757002/5776144 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 288979 event pairs, 11 based on Foata normal form. 10645/39884 useless extension candidates. Maximal degree in co-relation 100319. Up to 4866 conditions per place. [2022-11-18 20:32:28,636 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 221 selfloop transitions, 3580 changer transitions 0/3886 dead transitions. [2022-11-18 20:32:28,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 3886 transitions, 64550 flow [2022-11-18 20:32:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-18 20:32:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-11-18 20:32:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8334 transitions. [2022-11-18 20:32:28,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8678537956888472 [2022-11-18 20:32:28,666 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8334 transitions. [2022-11-18 20:32:28,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8334 transitions. [2022-11-18 20:32:28,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:28,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8334 transitions. [2022-11-18 20:32:28,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 85.91752577319588) internal successors, (8334), 97 states have internal predecessors, (8334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:28,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 99.0) internal successors, (9702), 98 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:28,719 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 99.0) internal successors, (9702), 98 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:28,720 INFO L175 Difference]: Start difference. First operand has 285 places, 1112 transitions, 18163 flow. Second operand 97 states and 8334 transitions. [2022-11-18 20:32:28,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 3886 transitions, 64550 flow [2022-11-18 20:32:31,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 3886 transitions, 54779 flow, removed 4687 selfloop flow, removed 11 redundant places. [2022-11-18 20:32:31,425 INFO L231 Difference]: Finished difference. Result has 464 places, 3698 transitions, 61608 flow [2022-11-18 20:32:31,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=16646, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=61608, PETRI_PLACES=464, PETRI_TRANSITIONS=3698} [2022-11-18 20:32:31,427 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 383 predicate places. [2022-11-18 20:32:31,427 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 3698 transitions, 61608 flow [2022-11-18 20:32:31,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 81.04123711340206) internal successors, (7861), 97 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:31,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:31,431 INFO L209 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:31,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:31,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:32:31,637 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:32:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:31,638 INFO L85 PathProgramCache]: Analyzing trace with hash 122613144, now seen corresponding path program 6 times [2022-11-18 20:32:31,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:31,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940342049] [2022-11-18 20:32:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:31,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:42,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:42,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940342049] [2022-11-18 20:32:42,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940342049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:42,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78717058] [2022-11-18 20:32:42,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:32:42,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:42,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:42,735 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:42,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afec6e8a-bf8b-44ee-bf35-9f4ecc9067d7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:32:43,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-18 20:32:43,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:32:43,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 20:32:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:44,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:58,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78717058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:32:58,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:32:58,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-18 20:32:58,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399350349] [2022-11-18 20:32:58,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:32:58,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-18 20:32:58,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-18 20:32:58,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-18 20:32:58,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-18 20:32:58,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 3698 transitions, 61608 flow. Second operand has 193 states, 193 states have (on average 81.02072538860104) internal successors, (15637), 193 states have internal predecessors, (15637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:58,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:58,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-18 20:32:58,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand