./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread-complex/bounded_buffer.i --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_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/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_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/bounded_buffer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/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_27977b1a-24a4-483a-be73-4a5a89d9169f/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 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 --- 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 19:49:03,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:49:03,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:49:03,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:49:03,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:49:03,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:49:03,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:49:03,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:49:03,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:49:03,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:49:03,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:49:03,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:49:03,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:49:03,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:49:03,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:49:03,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:49:03,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:49:03,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:49:03,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:49:03,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:49:03,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:49:03,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:49:03,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:49:03,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:49:03,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:49:03,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:49:03,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:49:03,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:49:03,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:49:03,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:49:03,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:49:03,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:49:03,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:49:03,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:49:03,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:49:03,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:49:03,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:49:03,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:49:03,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:49:03,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:49:03,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:49:03,971 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 19:49:04,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:49:04,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:49:04,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:49:04,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:49:04,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:49:04,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:49:04,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:49:04,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:49:04,018 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:49:04,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:49:04,019 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:49:04,019 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:49:04,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:49:04,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:49:04,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:49:04,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:49:04,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:49:04,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:49:04,021 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 19:49:04,021 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:49:04,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:49:04,022 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:49:04,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:49:04,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:49:04,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:49:04,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:49:04,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:49:04,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:49:04,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:49:04,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:49:04,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:49:04,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:49:04,025 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:49:04,025 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:49:04,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:49:04,026 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_27977b1a-24a4-483a-be73-4a5a89d9169f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 [2022-11-18 19:49:04,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:49:04,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:49:04,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:49:04,415 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:49:04,415 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:49:04,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-11-18 19:49:04,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/data/a39ac5359/88054faa3e7f4c7aae634f21e9a61a88/FLAGd6a94e605 [2022-11-18 19:49:05,126 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:49:05,127 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-11-18 19:49:05,157 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/data/a39ac5359/88054faa3e7f4c7aae634f21e9a61a88/FLAGd6a94e605 [2022-11-18 19:49:05,494 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/data/a39ac5359/88054faa3e7f4c7aae634f21e9a61a88 [2022-11-18 19:49:05,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:49:05,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:49:05,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:49:05,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:49:05,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:49:05,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:49:05" (1/1) ... [2022-11-18 19:49:05,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f64380b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:05, skipping insertion in model container [2022-11-18 19:49:05,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:49:05" (1/1) ... [2022-11-18 19:49:05,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:49:05,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:49:06,426 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_27977b1a-24a4-483a-be73-4a5a89d9169f/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2022-11-18 19:49:06,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:49:06,484 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:49:06,571 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_27977b1a-24a4-483a-be73-4a5a89d9169f/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2022-11-18 19:49:06,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:49:06,765 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:49:06,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06 WrapperNode [2022-11-18 19:49:06,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:49:06,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:49:06,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:49:06,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:49:06,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,889 INFO L138 Inliner]: procedures = 428, calls = 126, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 476 [2022-11-18 19:49:06,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:49:06,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:49:06,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:49:06,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:49:06,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,971 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:49:06,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:49:06,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:49:06,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:49:06,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (1/1) ... [2022-11-18 19:49:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:49:07,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:07,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:49:07,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27977b1a-24a4-483a-be73-4a5a89d9169f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:49:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2022-11-18 19:49:07,091 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2022-11-18 19:49:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:49:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:49:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 19:49:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:49:07,093 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2022-11-18 19:49:07,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:49:07,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 19:49:07,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:49:07,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:49:07,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:49:07,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 19:49:07,094 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2022-11-18 19:49:07,094 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2022-11-18 19:49:07,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:49:07,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:49:07,096 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 19:49:07,296 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:49:07,298 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:49:08,215 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:49:08,233 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:49:08,235 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-18 19:49:08,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:49:08 BoogieIcfgContainer [2022-11-18 19:49:08,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:49:08,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:49:08,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:49:08,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:49:08,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:49:05" (1/3) ... [2022-11-18 19:49:08,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451d1d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:49:08, skipping insertion in model container [2022-11-18 19:49:08,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:06" (2/3) ... [2022-11-18 19:49:08,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451d1d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:49:08, skipping insertion in model container [2022-11-18 19:49:08,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:49:08" (3/3) ... [2022-11-18 19:49:08,253 INFO L112 eAbstractionObserver]: Analyzing ICFG bounded_buffer.i [2022-11-18 19:49:08,266 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:49:08,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:49:08,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-18 19:49:08,277 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:49:08,425 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 19:49:08,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 470 places, 514 transitions, 1050 flow [2022-11-18 19:49:08,961 INFO L130 PetriNetUnfolder]: 109/1127 cut-off events. [2022-11-18 19:49:08,961 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 19:49:08,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 1127 events. 109/1127 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6908 event pairs, 0 based on Foata normal form. 0/964 useless extension candidates. Maximal degree in co-relation 590. Up to 16 conditions per place. [2022-11-18 19:49:08,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 470 places, 514 transitions, 1050 flow [2022-11-18 19:49:09,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 470 places, 514 transitions, 1050 flow [2022-11-18 19:49:09,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:49:09,041 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;@42157583, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:49:09,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-11-18 19:49:09,053 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-18 19:49:09,054 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:49:09,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:09,055 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] [2022-11-18 19:49:09,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:49:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash -670178589, now seen corresponding path program 1 times [2022-11-18 19:49:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:09,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162711731] [2022-11-18 19:49:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:09,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:09,558 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 19:49:09,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:09,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162711731] [2022-11-18 19:49:09,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162711731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:09,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:09,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:49:09,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031034073] [2022-11-18 19:49:09,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:49:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:49:09,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:49:09,619 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 471 out of 514 [2022-11-18 19:49:09,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 514 transitions, 1050 flow. Second operand has 5 states, 5 states have (on average 472.6) internal successors, (2363), 5 states have internal predecessors, (2363), 0 states have call successors, (0), 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 19:49:09,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:09,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 471 of 514 [2022-11-18 19:49:09,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:10,099 INFO L130 PetriNetUnfolder]: 74/1089 cut-off events. [2022-11-18 19:49:10,099 INFO L131 PetriNetUnfolder]: For 29/31 co-relation queries the response was YES. [2022-11-18 19:49:10,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1157 conditions, 1089 events. 74/1089 cut-off events. For 29/31 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6716 event pairs, 0 based on Foata normal form. 63/1022 useless extension candidates. Maximal degree in co-relation 583. Up to 39 conditions per place. [2022-11-18 19:49:10,131 INFO L137 encePairwiseOnDemand]: 497/514 looper letters, 25 selfloop transitions, 4 changer transitions 0/499 dead transitions. [2022-11-18 19:49:10,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 499 transitions, 1078 flow [2022-11-18 19:49:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:49:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:49:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2402 transitions. [2022-11-18 19:49:10,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9346303501945525 [2022-11-18 19:49:10,164 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2402 transitions. [2022-11-18 19:49:10,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2402 transitions. [2022-11-18 19:49:10,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:10,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2402 transitions. [2022-11-18 19:49:10,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 480.4) internal successors, (2402), 5 states have internal predecessors, (2402), 0 states have call successors, (0), 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 19:49:10,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 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 19:49:10,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 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 19:49:10,234 INFO L175 Difference]: Start difference. First operand has 470 places, 514 transitions, 1050 flow. Second operand 5 states and 2402 transitions. [2022-11-18 19:49:10,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 499 transitions, 1078 flow [2022-11-18 19:49:10,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 499 transitions, 1078 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:10,258 INFO L231 Difference]: Finished difference. Result has 472 places, 499 transitions, 1028 flow [2022-11-18 19:49:10,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1028, PETRI_PLACES=472, PETRI_TRANSITIONS=499} [2022-11-18 19:49:10,268 INFO L288 CegarLoopForPetriNet]: 470 programPoint places, 2 predicate places. [2022-11-18 19:49:10,269 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 499 transitions, 1028 flow [2022-11-18 19:49:10,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 472.6) internal successors, (2363), 5 states have internal predecessors, (2363), 0 states have call successors, (0), 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 19:49:10,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:10,272 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 19:49:10,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:49:10,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:49:10,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:10,276 INFO L85 PathProgramCache]: Analyzing trace with hash -927132261, now seen corresponding path program 1 times [2022-11-18 19:49:10,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:10,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214607454] [2022-11-18 19:49:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:10,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:10,417 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 19:49:10,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:10,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214607454] [2022-11-18 19:49:10,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214607454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:10,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:10,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:10,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494540456] [2022-11-18 19:49:10,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:10,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:49:10,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:10,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:49:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:49:10,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 514 [2022-11-18 19:49:10,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 499 transitions, 1028 flow. Second operand has 3 states, 3 states have (on average 483.0) internal successors, (1449), 3 states have internal predecessors, (1449), 0 states have call successors, (0), 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 19:49:10,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:10,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 514 [2022-11-18 19:49:10,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:10,824 INFO L130 PetriNetUnfolder]: 71/1083 cut-off events. [2022-11-18 19:49:10,824 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-18 19:49:10,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 1083 events. 71/1083 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6625 event pairs, 0 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 1081. Up to 18 conditions per place. [2022-11-18 19:49:10,853 INFO L137 encePairwiseOnDemand]: 510/514 looper letters, 13 selfloop transitions, 1 changer transitions 0/493 dead transitions. [2022-11-18 19:49:10,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 493 transitions, 1044 flow [2022-11-18 19:49:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:49:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:49:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1460 transitions. [2022-11-18 19:49:10,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9468223086900129 [2022-11-18 19:49:10,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1460 transitions. [2022-11-18 19:49:10,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1460 transitions. [2022-11-18 19:49:10,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:10,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1460 transitions. [2022-11-18 19:49:10,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 486.6666666666667) internal successors, (1460), 3 states have internal predecessors, (1460), 0 states have call successors, (0), 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 19:49:10,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 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 19:49:10,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 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 19:49:10,868 INFO L175 Difference]: Start difference. First operand has 472 places, 499 transitions, 1028 flow. Second operand 3 states and 1460 transitions. [2022-11-18 19:49:10,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 493 transitions, 1044 flow [2022-11-18 19:49:10,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 493 transitions, 1036 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 19:49:10,879 INFO L231 Difference]: Finished difference. Result has 467 places, 493 transitions, 1010 flow [2022-11-18 19:49:10,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1010, PETRI_PLACES=467, PETRI_TRANSITIONS=493} [2022-11-18 19:49:10,882 INFO L288 CegarLoopForPetriNet]: 470 programPoint places, -3 predicate places. [2022-11-18 19:49:10,882 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 493 transitions, 1010 flow [2022-11-18 19:49:10,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 483.0) internal successors, (1449), 3 states have internal predecessors, (1449), 0 states have call successors, (0), 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 19:49:10,883 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:10,884 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] [2022-11-18 19:49:10,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:49:10,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:49:10,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1158804262, now seen corresponding path program 1 times [2022-11-18 19:49:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:10,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582959466] [2022-11-18 19:49:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:10,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:11,174 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 19:49:11,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:11,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582959466] [2022-11-18 19:49:11,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582959466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:11,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:11,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:11,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923447615] [2022-11-18 19:49:11,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:11,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:49:11,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:49:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:49:11,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 460 out of 514 [2022-11-18 19:49:11,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 493 transitions, 1010 flow. Second operand has 4 states, 4 states have (on average 462.5) internal successors, (1850), 4 states have internal predecessors, (1850), 0 states have call successors, (0), 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 19:49:11,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:11,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 460 of 514 [2022-11-18 19:49:11,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:11,519 INFO L130 PetriNetUnfolder]: 31/537 cut-off events. [2022-11-18 19:49:11,520 INFO L131 PetriNetUnfolder]: For 17/26 co-relation queries the response was YES. [2022-11-18 19:49:11,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 537 events. 31/537 cut-off events. For 17/26 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1567 event pairs, 0 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 593. Up to 34 conditions per place. [2022-11-18 19:49:11,533 INFO L137 encePairwiseOnDemand]: 498/514 looper letters, 42 selfloop transitions, 10 changer transitions 33/507 dead transitions. [2022-11-18 19:49:11,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 507 transitions, 1154 flow [2022-11-18 19:49:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:49:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:49:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2361 transitions. [2022-11-18 19:49:11,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9186770428015564 [2022-11-18 19:49:11,543 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2361 transitions. [2022-11-18 19:49:11,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2361 transitions. [2022-11-18 19:49:11,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:11,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2361 transitions. [2022-11-18 19:49:11,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 472.2) internal successors, (2361), 5 states have internal predecessors, (2361), 0 states have call successors, (0), 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 19:49:11,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 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 19:49:11,559 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 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 19:49:11,559 INFO L175 Difference]: Start difference. First operand has 467 places, 493 transitions, 1010 flow. Second operand 5 states and 2361 transitions. [2022-11-18 19:49:11,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 507 transitions, 1154 flow [2022-11-18 19:49:11,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 507 transitions, 1153 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:49:11,571 INFO L231 Difference]: Finished difference. Result has 469 places, 461 transitions, 981 flow [2022-11-18 19:49:11,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=981, PETRI_PLACES=469, PETRI_TRANSITIONS=461} [2022-11-18 19:49:11,575 INFO L288 CegarLoopForPetriNet]: 470 programPoint places, -1 predicate places. [2022-11-18 19:49:11,575 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 461 transitions, 981 flow [2022-11-18 19:49:11,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 462.5) internal successors, (1850), 4 states have internal predecessors, (1850), 0 states have call successors, (0), 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 19:49:11,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:11,577 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:11,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:49:11,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:49:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:11,579 INFO L85 PathProgramCache]: Analyzing trace with hash -441760334, now seen corresponding path program 1 times [2022-11-18 19:49:11,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:11,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912892299] [2022-11-18 19:49:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:11,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:49:11,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:11,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912892299] [2022-11-18 19:49:11,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912892299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:11,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:11,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:49:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446428467] [2022-11-18 19:49:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:11,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:49:11,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:49:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:49:11,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 445 out of 514 [2022-11-18 19:49:11,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 461 transitions, 981 flow. Second operand has 5 states, 5 states have (on average 448.8) internal successors, (2244), 5 states have internal predecessors, (2244), 0 states have call successors, (0), 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 19:49:11,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:11,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 445 of 514 [2022-11-18 19:49:11,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:13,113 INFO L130 PetriNetUnfolder]: 742/4722 cut-off events. [2022-11-18 19:49:13,114 INFO L131 PetriNetUnfolder]: For 81/96 co-relation queries the response was YES. [2022-11-18 19:49:13,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5659 conditions, 4722 events. 742/4722 cut-off events. For 81/96 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 46804 event pairs, 435 based on Foata normal form. 0/4263 useless extension candidates. Maximal degree in co-relation 5627. Up to 791 conditions per place. [2022-11-18 19:49:13,162 INFO L137 encePairwiseOnDemand]: 508/514 looper letters, 48 selfloop transitions, 5 changer transitions 0/459 dead transitions. [2022-11-18 19:49:13,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 459 transitions, 1083 flow [2022-11-18 19:49:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:49:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:49:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2279 transitions. [2022-11-18 19:49:13,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8867704280155642 [2022-11-18 19:49:13,168 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2279 transitions. [2022-11-18 19:49:13,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2279 transitions. [2022-11-18 19:49:13,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:13,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2279 transitions. [2022-11-18 19:49:13,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 455.8) internal successors, (2279), 5 states have internal predecessors, (2279), 0 states have call successors, (0), 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 19:49:13,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 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 19:49:13,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 514.0) internal successors, (3084), 6 states have internal predecessors, (3084), 0 states have call successors, (0), 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 19:49:13,183 INFO L175 Difference]: Start difference. First operand has 469 places, 461 transitions, 981 flow. Second operand 5 states and 2279 transitions. [2022-11-18 19:49:13,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 459 transitions, 1083 flow [2022-11-18 19:49:13,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 459 transitions, 1071 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 19:49:13,194 INFO L231 Difference]: Finished difference. Result has 443 places, 459 transitions, 981 flow [2022-11-18 19:49:13,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=981, PETRI_PLACES=443, PETRI_TRANSITIONS=459} [2022-11-18 19:49:13,195 INFO L288 CegarLoopForPetriNet]: 470 programPoint places, -27 predicate places. [2022-11-18 19:49:13,195 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 459 transitions, 981 flow [2022-11-18 19:49:13,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 448.8) internal successors, (2244), 5 states have internal predecessors, (2244), 0 states have call successors, (0), 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 19:49:13,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:13,197 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:13,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:49:13,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-18 19:49:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1764296749, now seen corresponding path program 1 times [2022-11-18 19:49:13,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:13,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882432987] [2022-11-18 19:49:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:13,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:13,327 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:49:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:49:13,415 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:49:13,415 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:49:13,416 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 24 remaining) [2022-11-18 19:49:13,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 24 remaining) [2022-11-18 19:49:13,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 24 remaining) [2022-11-18 19:49:13,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 24 remaining) [2022-11-18 19:49:13,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 24 remaining) [2022-11-18 19:49:13,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 24 remaining) [2022-11-18 19:49:13,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 24 remaining) [2022-11-18 19:49:13,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 24 remaining) [2022-11-18 19:49:13,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 24 remaining) [2022-11-18 19:49:13,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 24 remaining) [2022-11-18 19:49:13,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 24 remaining) [2022-11-18 19:49:13,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 24 remaining) [2022-11-18 19:49:13,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 24 remaining) [2022-11-18 19:49:13,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 24 remaining) [2022-11-18 19:49:13,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 24 remaining) [2022-11-18 19:49:13,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 24 remaining) [2022-11-18 19:49:13,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 24 remaining) [2022-11-18 19:49:13,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 24 remaining) [2022-11-18 19:49:13,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location producer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 24 remaining) [2022-11-18 19:49:13,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location producer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 24 remaining) [2022-11-18 19:49:13,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 24 remaining) [2022-11-18 19:49:13,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 24 remaining) [2022-11-18 19:49:13,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location producer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 24 remaining) [2022-11-18 19:49:13,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location producer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 24 remaining) [2022-11-18 19:49:13,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:49:13,430 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 19:49:13,432 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:49:13,432 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 19:49:13,587 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-18 19:49:13,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 707 places, 776 transitions, 1600 flow [2022-11-18 19:49:15,213 INFO L130 PetriNetUnfolder]: 384/3722 cut-off events. [2022-11-18 19:49:15,213 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-18 19:49:15,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3819 conditions, 3722 events. 384/3722 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 30225 event pairs, 2 based on Foata normal form. 0/3163 useless extension candidates. Maximal degree in co-relation 2073. Up to 64 conditions per place. [2022-11-18 19:49:15,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 707 places, 776 transitions, 1600 flow [2022-11-18 19:49:15,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 707 places, 776 transitions, 1600 flow [2022-11-18 19:49:15,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:49:15,427 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;@42157583, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:49:15,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2022-11-18 19:49:15,436 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-18 19:49:15,437 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:49:15,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:15,437 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] [2022-11-18 19:49:15,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2022-11-18 19:49:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:15,438 INFO L85 PathProgramCache]: Analyzing trace with hash -667717782, now seen corresponding path program 1 times [2022-11-18 19:49:15,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:15,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618262582] [2022-11-18 19:49:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:15,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:15,651 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 19:49:15,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:15,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618262582] [2022-11-18 19:49:15,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618262582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:15,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:15,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:49:15,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821516821] [2022-11-18 19:49:15,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:15,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:49:15,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:15,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:49:15,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:49:15,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 776 [2022-11-18 19:49:15,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 776 transitions, 1600 flow. Second operand has 5 states, 5 states have (on average 722.6) internal successors, (3613), 5 states have internal predecessors, (3613), 0 states have call successors, (0), 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 19:49:15,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:15,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 776 [2022-11-18 19:49:15,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:17,245 INFO L130 PetriNetUnfolder]: 269/3600 cut-off events. [2022-11-18 19:49:17,245 INFO L131 PetriNetUnfolder]: For 215/221 co-relation queries the response was YES. [2022-11-18 19:49:17,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3848 conditions, 3600 events. 269/3600 cut-off events. For 215/221 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 30031 event pairs, 1 based on Foata normal form. 423/3573 useless extension candidates. Maximal degree in co-relation 2086. Up to 130 conditions per place. [2022-11-18 19:49:17,418 INFO L137 encePairwiseOnDemand]: 754/776 looper letters, 31 selfloop transitions, 4 changer transitions 0/755 dead transitions. [2022-11-18 19:49:17,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 755 transitions, 1628 flow [2022-11-18 19:49:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:49:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:49:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3668 transitions. [2022-11-18 19:49:17,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.945360824742268 [2022-11-18 19:49:17,426 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3668 transitions. [2022-11-18 19:49:17,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3668 transitions. [2022-11-18 19:49:17,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:17,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3668 transitions. [2022-11-18 19:49:17,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 733.6) internal successors, (3668), 5 states have internal predecessors, (3668), 0 states have call successors, (0), 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 19:49:17,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 776.0) internal successors, (4656), 6 states have internal predecessors, (4656), 0 states have call successors, (0), 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 19:49:17,446 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 776.0) internal successors, (4656), 6 states have internal predecessors, (4656), 0 states have call successors, (0), 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 19:49:17,446 INFO L175 Difference]: Start difference. First operand has 707 places, 776 transitions, 1600 flow. Second operand 5 states and 3668 transitions. [2022-11-18 19:49:17,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 755 transitions, 1628 flow [2022-11-18 19:49:17,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 755 transitions, 1628 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:49:17,459 INFO L231 Difference]: Finished difference. Result has 708 places, 755 transitions, 1566 flow [2022-11-18 19:49:17,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=776, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1566, PETRI_PLACES=708, PETRI_TRANSITIONS=755} [2022-11-18 19:49:17,461 INFO L288 CegarLoopForPetriNet]: 707 programPoint places, 1 predicate places. [2022-11-18 19:49:17,461 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 755 transitions, 1566 flow [2022-11-18 19:49:17,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 722.6) internal successors, (3613), 5 states have internal predecessors, (3613), 0 states have call successors, (0), 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 19:49:17,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:17,464 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 19:49:17,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:49:17,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2022-11-18 19:49:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:17,465 INFO L85 PathProgramCache]: Analyzing trace with hash 562610338, now seen corresponding path program 1 times [2022-11-18 19:49:17,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:17,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13591541] [2022-11-18 19:49:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:17,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:17,502 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 19:49:17,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13591541] [2022-11-18 19:49:17,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13591541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:17,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:17,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:17,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735543843] [2022-11-18 19:49:17,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:17,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:49:17,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:49:17,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:49:17,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 731 out of 776 [2022-11-18 19:49:17,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 755 transitions, 1566 flow. Second operand has 3 states, 3 states have (on average 733.0) internal successors, (2199), 3 states have internal predecessors, (2199), 0 states have call successors, (0), 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 19:49:17,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:17,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 731 of 776 [2022-11-18 19:49:17,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:19,393 INFO L130 PetriNetUnfolder]: 266/3594 cut-off events. [2022-11-18 19:49:19,394 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2022-11-18 19:49:19,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3792 conditions, 3594 events. 266/3594 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29907 event pairs, 1 based on Foata normal form. 0/3147 useless extension candidates. Maximal degree in co-relation 3680. Up to 79 conditions per place. [2022-11-18 19:49:19,604 INFO L137 encePairwiseOnDemand]: 772/776 looper letters, 19 selfloop transitions, 1 changer transitions 0/749 dead transitions. [2022-11-18 19:49:19,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 749 transitions, 1594 flow [2022-11-18 19:49:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:49:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:49:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2216 transitions. [2022-11-18 19:49:19,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9518900343642611 [2022-11-18 19:49:19,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2216 transitions. [2022-11-18 19:49:19,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2216 transitions. [2022-11-18 19:49:19,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:19,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2216 transitions. [2022-11-18 19:49:19,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 738.6666666666666) internal successors, (2216), 3 states have internal predecessors, (2216), 0 states have call successors, (0), 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 19:49:19,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 776.0) internal successors, (3104), 4 states have internal predecessors, (3104), 0 states have call successors, (0), 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 19:49:19,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 776.0) internal successors, (3104), 4 states have internal predecessors, (3104), 0 states have call successors, (0), 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 19:49:19,624 INFO L175 Difference]: Start difference. First operand has 708 places, 755 transitions, 1566 flow. Second operand 3 states and 2216 transitions. [2022-11-18 19:49:19,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 749 transitions, 1594 flow [2022-11-18 19:49:19,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 749 transitions, 1586 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 19:49:19,644 INFO L231 Difference]: Finished difference. Result has 703 places, 749 transitions, 1548 flow [2022-11-18 19:49:19,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=776, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1548, PETRI_PLACES=703, PETRI_TRANSITIONS=749} [2022-11-18 19:49:19,648 INFO L288 CegarLoopForPetriNet]: 707 programPoint places, -4 predicate places. [2022-11-18 19:49:19,648 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 749 transitions, 1548 flow [2022-11-18 19:49:19,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 733.0) internal successors, (2199), 3 states have internal predecessors, (2199), 0 states have call successors, (0), 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 19:49:19,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:19,650 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] [2022-11-18 19:49:19,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:49:19,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2022-11-18 19:49:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1165693671, now seen corresponding path program 1 times [2022-11-18 19:49:19,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:19,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305410081] [2022-11-18 19:49:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:19,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:19,938 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 19:49:19,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:19,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305410081] [2022-11-18 19:49:19,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305410081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:19,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:19,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:19,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086019904] [2022-11-18 19:49:19,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:19,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:49:19,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:19,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:49:19,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:49:19,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 776 [2022-11-18 19:49:19,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 749 transitions, 1548 flow. Second operand has 4 states, 4 states have (on average 712.5) internal successors, (2850), 4 states have internal predecessors, (2850), 0 states have call successors, (0), 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 19:49:19,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:19,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 776 [2022-11-18 19:49:19,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:49:21,256 INFO L130 PetriNetUnfolder]: 207/2772 cut-off events. [2022-11-18 19:49:21,256 INFO L131 PetriNetUnfolder]: For 116/152 co-relation queries the response was YES. [2022-11-18 19:49:21,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3253 conditions, 2772 events. 207/2772 cut-off events. For 116/152 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 20496 event pairs, 0 based on Foata normal form. 4/2427 useless extension candidates. Maximal degree in co-relation 3220. Up to 226 conditions per place. [2022-11-18 19:49:21,354 INFO L137 encePairwiseOnDemand]: 760/776 looper letters, 68 selfloop transitions, 10 changer transitions 0/780 dead transitions. [2022-11-18 19:49:21,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 780 transitions, 1790 flow [2022-11-18 19:49:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:49:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:49:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3634 transitions. [2022-11-18 19:49:21,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9365979381443299 [2022-11-18 19:49:21,361 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3634 transitions. [2022-11-18 19:49:21,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3634 transitions. [2022-11-18 19:49:21,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:49:21,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3634 transitions. [2022-11-18 19:49:21,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 726.8) internal successors, (3634), 5 states have internal predecessors, (3634), 0 states have call successors, (0), 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 19:49:21,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 776.0) internal successors, (4656), 6 states have internal predecessors, (4656), 0 states have call successors, (0), 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 19:49:21,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 776.0) internal successors, (4656), 6 states have internal predecessors, (4656), 0 states have call successors, (0), 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 19:49:21,380 INFO L175 Difference]: Start difference. First operand has 703 places, 749 transitions, 1548 flow. Second operand 5 states and 3634 transitions. [2022-11-18 19:49:21,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 780 transitions, 1790 flow [2022-11-18 19:49:21,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 780 transitions, 1789 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:49:21,394 INFO L231 Difference]: Finished difference. Result has 709 places, 755 transitions, 1615 flow [2022-11-18 19:49:21,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=776, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1615, PETRI_PLACES=709, PETRI_TRANSITIONS=755} [2022-11-18 19:49:21,396 INFO L288 CegarLoopForPetriNet]: 707 programPoint places, 2 predicate places. [2022-11-18 19:49:21,397 INFO L495 AbstractCegarLoop]: Abstraction has has 709 places, 755 transitions, 1615 flow [2022-11-18 19:49:21,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 712.5) internal successors, (2850), 4 states have internal predecessors, (2850), 0 states have call successors, (0), 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 19:49:21,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:49:21,398 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:21,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 19:49:21,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [consumer_routineErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, consumer_routineErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2022-11-18 19:49:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:21,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1954026310, now seen corresponding path program 1 times [2022-11-18 19:49:21,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:49:21,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420300291] [2022-11-18 19:49:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:21,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:49:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:49:21,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:49:21,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420300291] [2022-11-18 19:49:21,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420300291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:21,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:21,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:49:21,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376306251] [2022-11-18 19:49:21,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:21,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:49:21,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:49:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:49:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:49:21,593 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 776 [2022-11-18 19:49:21,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 755 transitions, 1615 flow. Second operand has 5 states, 5 states have (on average 685.0) internal successors, (3425), 5 states have internal predecessors, (3425), 0 states have call successors, (0), 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 19:49:21,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:49:21,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 776 [2022-11-18 19:49:21,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand