./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f 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_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8 --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 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --- 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-e04fb08 [2022-11-16 12:52:07,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:52:07,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:52:07,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:52:07,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:52:07,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:52:07,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:52:07,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:52:07,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:52:07,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:52:07,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:52:07,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:52:07,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:52:07,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:52:07,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:52:07,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:52:07,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:52:07,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:52:07,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:52:07,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:52:07,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:52:07,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:52:07,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:52:07,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:52:07,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:52:07,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:52:07,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:52:07,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:52:07,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:52:07,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:52:07,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:52:07,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:52:07,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:52:07,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:52:07,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:52:07,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:52:07,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:52:07,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:52:07,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:52:07,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:52:07,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:52:07,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:52:07,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:52:07,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:52:07,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:52:07,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:52:07,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:52:07,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:52:07,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:52:07,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:52:07,363 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:52:07,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:52:07,364 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:52:07,365 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:52:07,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:52:07,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:52:07,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:52:07,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:52:07,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:52:07,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:52:07,366 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:52:07,367 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:52:07,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:52:07,367 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:52:07,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:52:07,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:52:07,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:52:07,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:52:07,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:07,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:52:07,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:52:07,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:52:07,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:52:07,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:52:07,370 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:52:07,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:52:07,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:52:07,371 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_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e [2022-11-16 12:52:07,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:52:07,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:52:07,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:52:07,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:52:07,717 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:52:07,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2022-11-16 12:52:07,786 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/data/cbd765b06/643e0a09634b46a4b78dfcd4632d0dcf/FLAGf53b425ff [2022-11-16 12:52:08,292 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:52:08,295 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2022-11-16 12:52:08,306 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/data/cbd765b06/643e0a09634b46a4b78dfcd4632d0dcf/FLAGf53b425ff [2022-11-16 12:52:08,643 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/data/cbd765b06/643e0a09634b46a4b78dfcd4632d0dcf [2022-11-16 12:52:08,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:52:08,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:52:08,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:08,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:52:08,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:52:08,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ce17da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08, skipping insertion in model container [2022-11-16 12:52:08,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:52:08,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:52:08,886 WARN L229 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_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2507,2520] [2022-11-16 12:52:08,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:08,895 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:52:08,918 WARN L229 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_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2507,2520] [2022-11-16 12:52:08,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:08,931 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:52:08,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08 WrapperNode [2022-11-16 12:52:08,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:08,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:08,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:52:08,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:52:08,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,968 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 128 [2022-11-16 12:52:08,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:08,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:52:08,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:52:08,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:52:08,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:09,018 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:09,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:09,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:52:09,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:52:09,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:52:09,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:52:09,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:09,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:09,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:09,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:52:09,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:52:09,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:52:09,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:52:09,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:52:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:52:09,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:52:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:52:09,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:52:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 12:52:09,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 12:52:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:52:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:52:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:52:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:52:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:52:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:52:09,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:52:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:52:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:52:09,107 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:52:09,228 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:52:09,231 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:52:09,642 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:52:09,800 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:52:09,808 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 12:52:09,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:09 BoogieIcfgContainer [2022-11-16 12:52:09,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:52:09,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:52:09,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:52:09,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:52:09,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:52:08" (1/3) ... [2022-11-16 12:52:09,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a08e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:09, skipping insertion in model container [2022-11-16 12:52:09,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (2/3) ... [2022-11-16 12:52:09,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a08e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:09, skipping insertion in model container [2022-11-16 12:52:09,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:09" (3/3) ... [2022-11-16 12:52:09,826 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2022-11-16 12:52:09,840 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:52:09,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:52:09,853 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-16 12:52:09,853 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:52:09,992 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:52:10,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 151 transitions, 334 flow [2022-11-16 12:52:10,116 INFO L130 PetriNetUnfolder]: 9/147 cut-off events. [2022-11-16 12:52:10,117 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:52:10,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 147 events. 9/147 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2022-11-16 12:52:10,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 151 transitions, 334 flow [2022-11-16 12:52:10,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 124 transitions, 269 flow [2022-11-16 12:52:10,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:52:10,151 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;@145ac6cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:52:10,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-11-16 12:52:10,165 INFO L130 PetriNetUnfolder]: 1/37 cut-off events. [2022-11-16 12:52:10,165 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:52:10,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:10,166 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] [2022-11-16 12:52:10,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:10,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1668384649, now seen corresponding path program 1 times [2022-11-16 12:52:10,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:10,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516028771] [2022-11-16 12:52:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:10,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:10,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:10,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516028771] [2022-11-16 12:52:10,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516028771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:10,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:10,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:10,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740681583] [2022-11-16 12:52:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:10,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:10,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:10,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:10,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 151 [2022-11-16 12:52:10,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 124 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:10,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 151 [2022-11-16 12:52:10,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:11,400 INFO L130 PetriNetUnfolder]: 795/2231 cut-off events. [2022-11-16 12:52:11,401 INFO L131 PetriNetUnfolder]: For 343/344 co-relation queries the response was YES. [2022-11-16 12:52:11,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3489 conditions, 2231 events. 795/2231 cut-off events. For 343/344 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17011 event pairs, 137 based on Foata normal form. 398/1743 useless extension candidates. Maximal degree in co-relation 3209. Up to 908 conditions per place. [2022-11-16 12:52:11,442 INFO L137 encePairwiseOnDemand]: 139/151 looper letters, 28 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2022-11-16 12:52:11,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 130 transitions, 359 flow [2022-11-16 12:52:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2022-11-16 12:52:11,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9161147902869757 [2022-11-16 12:52:11,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2022-11-16 12:52:11,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2022-11-16 12:52:11,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:11,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2022-11-16 12:52:11,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,513 INFO L175 Difference]: Start difference. First operand has 129 places, 124 transitions, 269 flow. Second operand 3 states and 415 transitions. [2022-11-16 12:52:11,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 130 transitions, 359 flow [2022-11-16 12:52:11,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 130 transitions, 335 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-16 12:52:11,524 INFO L231 Difference]: Finished difference. Result has 123 places, 119 transitions, 262 flow [2022-11-16 12:52:11,526 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=123, PETRI_TRANSITIONS=119} [2022-11-16 12:52:11,531 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, -6 predicate places. [2022-11-16 12:52:11,532 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 119 transitions, 262 flow [2022-11-16 12:52:11,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:11,533 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] [2022-11-16 12:52:11,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:52:11,534 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1294830726, now seen corresponding path program 1 times [2022-11-16 12:52:11,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:11,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438627098] [2022-11-16 12:52:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:11,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:11,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:11,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438627098] [2022-11-16 12:52:11,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438627098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:11,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:11,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:11,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834619973] [2022-11-16 12:52:11,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:11,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:11,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:11,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:11,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 151 [2022-11-16 12:52:11,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:11,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 151 [2022-11-16 12:52:11,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:13,012 INFO L130 PetriNetUnfolder]: 3366/7182 cut-off events. [2022-11-16 12:52:13,012 INFO L131 PetriNetUnfolder]: For 743/755 co-relation queries the response was YES. [2022-11-16 12:52:13,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13442 conditions, 7182 events. 3366/7182 cut-off events. For 743/755 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 59747 event pairs, 1104 based on Foata normal form. 1/4259 useless extension candidates. Maximal degree in co-relation 9608. Up to 3019 conditions per place. [2022-11-16 12:52:13,132 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 64 selfloop transitions, 4 changer transitions 0/159 dead transitions. [2022-11-16 12:52:13,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 159 transitions, 505 flow [2022-11-16 12:52:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:52:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:52:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 645 transitions. [2022-11-16 12:52:13,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8543046357615894 [2022-11-16 12:52:13,137 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 645 transitions. [2022-11-16 12:52:13,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 645 transitions. [2022-11-16 12:52:13,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:13,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 645 transitions. [2022-11-16 12:52:13,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,145 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,145 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 262 flow. Second operand 5 states and 645 transitions. [2022-11-16 12:52:13,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 159 transitions, 505 flow [2022-11-16 12:52:13,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 159 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:13,151 INFO L231 Difference]: Finished difference. Result has 129 places, 122 transitions, 290 flow [2022-11-16 12:52:13,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=129, PETRI_TRANSITIONS=122} [2022-11-16 12:52:13,153 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 0 predicate places. [2022-11-16 12:52:13,153 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 122 transitions, 290 flow [2022-11-16 12:52:13,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:13,154 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:13,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:52:13,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1746367030, now seen corresponding path program 1 times [2022-11-16 12:52:13,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:13,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923896242] [2022-11-16 12:52:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:13,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:13,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:13,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923896242] [2022-11-16 12:52:13,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923896242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:13,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301874822] [2022-11-16 12:52:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:13,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:13,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:13,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:52:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:52:13,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:13,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:13,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301874822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:13,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:13,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 12:52:13,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697897735] [2022-11-16 12:52:13,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:13,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:13,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:13,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 151 [2022-11-16 12:52:13,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 122 transitions, 290 flow. Second operand has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:13,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 151 [2022-11-16 12:52:13,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:14,518 INFO L130 PetriNetUnfolder]: 1635/4659 cut-off events. [2022-11-16 12:52:14,518 INFO L131 PetriNetUnfolder]: For 698/783 co-relation queries the response was YES. [2022-11-16 12:52:14,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8416 conditions, 4659 events. 1635/4659 cut-off events. For 698/783 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 40383 event pairs, 172 based on Foata normal form. 63/3387 useless extension candidates. Maximal degree in co-relation 6499. Up to 777 conditions per place. [2022-11-16 12:52:14,577 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 69 selfloop transitions, 12 changer transitions 0/184 dead transitions. [2022-11-16 12:52:14,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 184 transitions, 628 flow [2022-11-16 12:52:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 953 transitions. [2022-11-16 12:52:14,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9016083254493851 [2022-11-16 12:52:14,581 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 953 transitions. [2022-11-16 12:52:14,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 953 transitions. [2022-11-16 12:52:14,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:14,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 953 transitions. [2022-11-16 12:52:14,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,589 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,589 INFO L175 Difference]: Start difference. First operand has 129 places, 122 transitions, 290 flow. Second operand 7 states and 953 transitions. [2022-11-16 12:52:14,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 184 transitions, 628 flow [2022-11-16 12:52:14,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 184 transitions, 626 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:14,596 INFO L231 Difference]: Finished difference. Result has 139 places, 131 transitions, 397 flow [2022-11-16 12:52:14,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=139, PETRI_TRANSITIONS=131} [2022-11-16 12:52:14,597 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 10 predicate places. [2022-11-16 12:52:14,597 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 131 transitions, 397 flow [2022-11-16 12:52:14,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:14,599 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:14,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:14,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:14,805 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:14,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1746367031, now seen corresponding path program 1 times [2022-11-16 12:52:14,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:14,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301949923] [2022-11-16 12:52:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:14,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301949923] [2022-11-16 12:52:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301949923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:14,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:14,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:14,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129225331] [2022-11-16 12:52:14,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:14,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:14,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:14,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:14,866 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 151 [2022-11-16 12:52:14,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 131 transitions, 397 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:14,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 151 [2022-11-16 12:52:14,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:15,692 INFO L130 PetriNetUnfolder]: 1427/4577 cut-off events. [2022-11-16 12:52:15,692 INFO L131 PetriNetUnfolder]: For 6739/7443 co-relation queries the response was YES. [2022-11-16 12:52:15,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9433 conditions, 4577 events. 1427/4577 cut-off events. For 6739/7443 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 41221 event pairs, 764 based on Foata normal form. 96/3314 useless extension candidates. Maximal degree in co-relation 7273. Up to 1909 conditions per place. [2022-11-16 12:52:15,763 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 23 selfloop transitions, 1 changer transitions 0/127 dead transitions. [2022-11-16 12:52:15,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 127 transitions, 414 flow [2022-11-16 12:52:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2022-11-16 12:52:15,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8543046357615894 [2022-11-16 12:52:15,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2022-11-16 12:52:15,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2022-11-16 12:52:15,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:15,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2022-11-16 12:52:15,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:15,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:15,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:15,771 INFO L175 Difference]: Start difference. First operand has 139 places, 131 transitions, 397 flow. Second operand 3 states and 387 transitions. [2022-11-16 12:52:15,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 127 transitions, 414 flow [2022-11-16 12:52:15,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 127 transitions, 402 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:15,781 INFO L231 Difference]: Finished difference. Result has 138 places, 127 transitions, 356 flow [2022-11-16 12:52:15,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=138, PETRI_TRANSITIONS=127} [2022-11-16 12:52:15,782 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 9 predicate places. [2022-11-16 12:52:15,782 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 127 transitions, 356 flow [2022-11-16 12:52:15,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:15,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:15,784 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:52:15,784 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1073481351, now seen corresponding path program 1 times [2022-11-16 12:52:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:15,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822601843] [2022-11-16 12:52:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:15,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:15,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822601843] [2022-11-16 12:52:15,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822601843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490459157] [2022-11-16 12:52:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:15,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:15,905 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:15,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:52:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:16,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:16,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:16,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:16,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490459157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:16,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:16,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:52:16,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298452157] [2022-11-16 12:52:16,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:16,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:52:16,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:16,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:52:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:52:16,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 151 [2022-11-16 12:52:16,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 127 transitions, 356 flow. Second operand has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:16,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:16,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 151 [2022-11-16 12:52:16,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:20,324 INFO L130 PetriNetUnfolder]: 11390/19212 cut-off events. [2022-11-16 12:52:20,324 INFO L131 PetriNetUnfolder]: For 25573/25573 co-relation queries the response was YES. [2022-11-16 12:52:20,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50283 conditions, 19212 events. 11390/19212 cut-off events. For 25573/25573 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 145111 event pairs, 1406 based on Foata normal form. 275/14046 useless extension candidates. Maximal degree in co-relation 50258. Up to 3720 conditions per place. [2022-11-16 12:52:20,711 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 237 selfloop transitions, 18 changer transitions 0/346 dead transitions. [2022-11-16 12:52:20,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 346 transitions, 1701 flow [2022-11-16 12:52:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:52:20,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:52:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2294 transitions. [2022-11-16 12:52:20,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8440029433406917 [2022-11-16 12:52:20,719 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2294 transitions. [2022-11-16 12:52:20,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2294 transitions. [2022-11-16 12:52:20,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:20,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2294 transitions. [2022-11-16 12:52:20,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 127.44444444444444) internal successors, (2294), 18 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:20,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:20,736 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:20,737 INFO L175 Difference]: Start difference. First operand has 138 places, 127 transitions, 356 flow. Second operand 18 states and 2294 transitions. [2022-11-16 12:52:20,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 346 transitions, 1701 flow [2022-11-16 12:52:20,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 346 transitions, 1700 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:20,765 INFO L231 Difference]: Finished difference. Result has 158 places, 139 transitions, 461 flow [2022-11-16 12:52:20,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=461, PETRI_PLACES=158, PETRI_TRANSITIONS=139} [2022-11-16 12:52:20,767 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 29 predicate places. [2022-11-16 12:52:20,767 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 139 transitions, 461 flow [2022-11-16 12:52:20,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.66666666666667) internal successors, (1412), 12 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:20,769 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:20,769 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:20,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:20,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:20,976 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1081816947, now seen corresponding path program 1 times [2022-11-16 12:52:20,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:20,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929664174] [2022-11-16 12:52:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:20,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:21,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:21,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929664174] [2022-11-16 12:52:21,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929664174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:21,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355294768] [2022-11-16 12:52:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:21,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:21,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:21,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:21,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:52:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:21,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:21,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:52:21,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355294768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:21,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:52:21,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:52:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847464468] [2022-11-16 12:52:21,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:21,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:52:21,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:52:21,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:52:21,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 151 [2022-11-16 12:52:21,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 139 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:21,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:21,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 151 [2022-11-16 12:52:21,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:24,010 INFO L130 PetriNetUnfolder]: 10249/18027 cut-off events. [2022-11-16 12:52:24,011 INFO L131 PetriNetUnfolder]: For 25865/26361 co-relation queries the response was YES. [2022-11-16 12:52:24,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48124 conditions, 18027 events. 10249/18027 cut-off events. For 25865/26361 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 143280 event pairs, 603 based on Foata normal form. 517/13352 useless extension candidates. Maximal degree in co-relation 48096. Up to 6763 conditions per place. [2022-11-16 12:52:24,514 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 87 selfloop transitions, 11 changer transitions 0/189 dead transitions. [2022-11-16 12:52:24,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 189 transitions, 801 flow [2022-11-16 12:52:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 887 transitions. [2022-11-16 12:52:24,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8391674550614948 [2022-11-16 12:52:24,518 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 887 transitions. [2022-11-16 12:52:24,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 887 transitions. [2022-11-16 12:52:24,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:24,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 887 transitions. [2022-11-16 12:52:24,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.71428571428571) internal successors, (887), 7 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,526 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,526 INFO L175 Difference]: Start difference. First operand has 158 places, 139 transitions, 461 flow. Second operand 7 states and 887 transitions. [2022-11-16 12:52:24,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 189 transitions, 801 flow [2022-11-16 12:52:24,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 189 transitions, 769 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:24,560 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 424 flow [2022-11-16 12:52:24,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=424, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2022-11-16 12:52:24,563 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 25 predicate places. [2022-11-16 12:52:24,564 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 424 flow [2022-11-16 12:52:24,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:24,565 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] [2022-11-16 12:52:24,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:24,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:24,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:24,771 INFO L85 PathProgramCache]: Analyzing trace with hash -147609849, now seen corresponding path program 1 times [2022-11-16 12:52:24,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:24,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881339399] [2022-11-16 12:52:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:24,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:24,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:24,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881339399] [2022-11-16 12:52:24,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881339399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:24,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:24,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:24,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958652447] [2022-11-16 12:52:24,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:24,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:24,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:24,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:24,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 151 [2022-11-16 12:52:24,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 424 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:24,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 151 [2022-11-16 12:52:24,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:29,342 INFO L130 PetriNetUnfolder]: 19538/31216 cut-off events. [2022-11-16 12:52:29,342 INFO L131 PetriNetUnfolder]: For 26619/33559 co-relation queries the response was YES. [2022-11-16 12:52:29,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74115 conditions, 31216 events. 19538/31216 cut-off events. For 26619/33559 co-relation queries the response was YES. Maximal size of possible extension queue 1472. Compared 261626 event pairs, 9697 based on Foata normal form. 88/18720 useless extension candidates. Maximal degree in co-relation 74088. Up to 18916 conditions per place. [2022-11-16 12:52:29,658 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 85 selfloop transitions, 4 changer transitions 0/191 dead transitions. [2022-11-16 12:52:29,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 191 transitions, 859 flow [2022-11-16 12:52:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:52:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:52:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 644 transitions. [2022-11-16 12:52:29,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8529801324503311 [2022-11-16 12:52:29,665 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 644 transitions. [2022-11-16 12:52:29,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 644 transitions. [2022-11-16 12:52:29,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:29,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 644 transitions. [2022-11-16 12:52:29,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,671 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,671 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 424 flow. Second operand 5 states and 644 transitions. [2022-11-16 12:52:29,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 191 transitions, 859 flow [2022-11-16 12:52:29,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 191 transitions, 845 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:29,703 INFO L231 Difference]: Finished difference. Result has 156 places, 138 transitions, 440 flow [2022-11-16 12:52:29,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=440, PETRI_PLACES=156, PETRI_TRANSITIONS=138} [2022-11-16 12:52:29,705 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 27 predicate places. [2022-11-16 12:52:29,706 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 138 transitions, 440 flow [2022-11-16 12:52:29,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:29,707 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] [2022-11-16 12:52:29,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:52:29,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash 825674972, now seen corresponding path program 1 times [2022-11-16 12:52:29,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:29,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486187540] [2022-11-16 12:52:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:29,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:29,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486187540] [2022-11-16 12:52:29,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486187540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:29,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:29,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:29,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552402939] [2022-11-16 12:52:29,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:29,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:29,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:29,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 151 [2022-11-16 12:52:29,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 138 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:29,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 151 [2022-11-16 12:52:29,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:31,133 INFO L130 PetriNetUnfolder]: 2766/8917 cut-off events. [2022-11-16 12:52:31,133 INFO L131 PetriNetUnfolder]: For 8940/9079 co-relation queries the response was YES. [2022-11-16 12:52:31,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17433 conditions, 8917 events. 2766/8917 cut-off events. For 8940/9079 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 91253 event pairs, 904 based on Foata normal form. 105/6978 useless extension candidates. Maximal degree in co-relation 17402. Up to 3347 conditions per place. [2022-11-16 12:52:31,228 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 37 selfloop transitions, 2 changer transitions 1/154 dead transitions. [2022-11-16 12:52:31,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 154 transitions, 622 flow [2022-11-16 12:52:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2022-11-16 12:52:31,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8807947019867549 [2022-11-16 12:52:31,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2022-11-16 12:52:31,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2022-11-16 12:52:31,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:31,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2022-11-16 12:52:31,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,235 INFO L175 Difference]: Start difference. First operand has 156 places, 138 transitions, 440 flow. Second operand 3 states and 399 transitions. [2022-11-16 12:52:31,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 154 transitions, 622 flow [2022-11-16 12:52:31,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 154 transitions, 620 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:31,246 INFO L231 Difference]: Finished difference. Result has 158 places, 139 transitions, 456 flow [2022-11-16 12:52:31,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=456, PETRI_PLACES=158, PETRI_TRANSITIONS=139} [2022-11-16 12:52:31,248 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 29 predicate places. [2022-11-16 12:52:31,248 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 139 transitions, 456 flow [2022-11-16 12:52:31,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:31,249 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] [2022-11-16 12:52:31,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:52:31,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1095285089, now seen corresponding path program 1 times [2022-11-16 12:52:31,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918282886] [2022-11-16 12:52:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:31,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:31,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918282886] [2022-11-16 12:52:31,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918282886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:31,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:31,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:31,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751010483] [2022-11-16 12:52:31,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:31,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:31,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 151 [2022-11-16 12:52:31,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 139 transitions, 456 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:31,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 151 [2022-11-16 12:52:31,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:35,304 INFO L130 PetriNetUnfolder]: 12928/24790 cut-off events. [2022-11-16 12:52:35,304 INFO L131 PetriNetUnfolder]: For 46823/47253 co-relation queries the response was YES. [2022-11-16 12:52:35,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69520 conditions, 24790 events. 12928/24790 cut-off events. For 46823/47253 co-relation queries the response was YES. Maximal size of possible extension queue 1449. Compared 245585 event pairs, 4981 based on Foata normal form. 7/19220 useless extension candidates. Maximal degree in co-relation 69488. Up to 12095 conditions per place. [2022-11-16 12:52:35,638 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 85 selfloop transitions, 4 changer transitions 1/195 dead transitions. [2022-11-16 12:52:35,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 195 transitions, 968 flow [2022-11-16 12:52:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:52:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:52:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 639 transitions. [2022-11-16 12:52:35,641 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8463576158940397 [2022-11-16 12:52:35,642 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 639 transitions. [2022-11-16 12:52:35,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 639 transitions. [2022-11-16 12:52:35,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:35,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 639 transitions. [2022-11-16 12:52:35,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:35,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:35,647 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:35,647 INFO L175 Difference]: Start difference. First operand has 158 places, 139 transitions, 456 flow. Second operand 5 states and 639 transitions. [2022-11-16 12:52:35,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 195 transitions, 968 flow [2022-11-16 12:52:35,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 195 transitions, 966 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:35,665 INFO L231 Difference]: Finished difference. Result has 164 places, 142 transitions, 484 flow [2022-11-16 12:52:35,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=484, PETRI_PLACES=164, PETRI_TRANSITIONS=142} [2022-11-16 12:52:35,667 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 35 predicate places. [2022-11-16 12:52:35,667 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 142 transitions, 484 flow [2022-11-16 12:52:35,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:35,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:35,668 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:35,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:52:35,668 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:35,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2050213457, now seen corresponding path program 1 times [2022-11-16 12:52:35,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:35,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717364341] [2022-11-16 12:52:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:35,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717364341] [2022-11-16 12:52:35,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717364341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783698244] [2022-11-16 12:52:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:35,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:35,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:35,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:35,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:52:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:52:35,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:35,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:36,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783698244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:36,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:36,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 12:52:36,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206468729] [2022-11-16 12:52:36,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:36,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:36,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:36,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:36,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 151 [2022-11-16 12:52:36,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 142 transitions, 484 flow. Second operand has 7 states, 7 states have (on average 125.42857142857143) internal successors, (878), 7 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:36,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:36,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 151 [2022-11-16 12:52:36,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:39,079 INFO L130 PetriNetUnfolder]: 5155/18841 cut-off events. [2022-11-16 12:52:39,080 INFO L131 PetriNetUnfolder]: For 17449/18044 co-relation queries the response was YES. [2022-11-16 12:52:39,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41386 conditions, 18841 events. 5155/18841 cut-off events. For 17449/18044 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 228952 event pairs, 436 based on Foata normal form. 335/15926 useless extension candidates. Maximal degree in co-relation 41350. Up to 3687 conditions per place. [2022-11-16 12:52:39,321 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 97 selfloop transitions, 12 changer transitions 0/226 dead transitions. [2022-11-16 12:52:39,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 226 transitions, 1239 flow [2022-11-16 12:52:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 939 transitions. [2022-11-16 12:52:39,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8883632923368022 [2022-11-16 12:52:39,325 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 939 transitions. [2022-11-16 12:52:39,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 939 transitions. [2022-11-16 12:52:39,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:39,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 939 transitions. [2022-11-16 12:52:39,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.14285714285714) internal successors, (939), 7 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,331 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,331 INFO L175 Difference]: Start difference. First operand has 164 places, 142 transitions, 484 flow. Second operand 7 states and 939 transitions. [2022-11-16 12:52:39,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 226 transitions, 1239 flow [2022-11-16 12:52:39,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 226 transitions, 1237 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:39,355 INFO L231 Difference]: Finished difference. Result has 174 places, 151 transitions, 591 flow [2022-11-16 12:52:39,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=591, PETRI_PLACES=174, PETRI_TRANSITIONS=151} [2022-11-16 12:52:39,358 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 45 predicate places. [2022-11-16 12:52:39,358 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 151 transitions, 591 flow [2022-11-16 12:52:39,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.42857142857143) internal successors, (878), 7 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:39,361 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:39,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:39,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:52:39,566 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2050213458, now seen corresponding path program 1 times [2022-11-16 12:52:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:39,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823362923] [2022-11-16 12:52:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:39,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:39,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:39,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823362923] [2022-11-16 12:52:39,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823362923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:39,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:39,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:39,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856524520] [2022-11-16 12:52:39,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:39,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:39,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:39,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:39,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 151 [2022-11-16 12:52:39,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 151 transitions, 591 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:39,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 151 [2022-11-16 12:52:39,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:42,934 INFO L130 PetriNetUnfolder]: 4098/17900 cut-off events. [2022-11-16 12:52:42,934 INFO L131 PetriNetUnfolder]: For 39958/45450 co-relation queries the response was YES. [2022-11-16 12:52:43,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44391 conditions, 17900 events. 4098/17900 cut-off events. For 39958/45450 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 222083 event pairs, 2261 based on Foata normal form. 719/15971 useless extension candidates. Maximal degree in co-relation 44349. Up to 5723 conditions per place. [2022-11-16 12:52:43,171 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 29 selfloop transitions, 1 changer transitions 0/147 dead transitions. [2022-11-16 12:52:43,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 147 transitions, 620 flow [2022-11-16 12:52:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2022-11-16 12:52:43,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8520971302428256 [2022-11-16 12:52:43,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2022-11-16 12:52:43,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2022-11-16 12:52:43,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:43,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2022-11-16 12:52:43,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:43,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:43,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:43,180 INFO L175 Difference]: Start difference. First operand has 174 places, 151 transitions, 591 flow. Second operand 3 states and 386 transitions. [2022-11-16 12:52:43,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 147 transitions, 620 flow [2022-11-16 12:52:43,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 147 transitions, 608 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:43,216 INFO L231 Difference]: Finished difference. Result has 173 places, 147 transitions, 550 flow [2022-11-16 12:52:43,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=550, PETRI_PLACES=173, PETRI_TRANSITIONS=147} [2022-11-16 12:52:43,217 INFO L288 CegarLoopForPetriNet]: 129 programPoint places, 44 predicate places. [2022-11-16 12:52:43,217 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 147 transitions, 550 flow [2022-11-16 12:52:43,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:43,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:43,218 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:43,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:52:43,218 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:43,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1134840108, now seen corresponding path program 1 times [2022-11-16 12:52:43,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:43,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758979851] [2022-11-16 12:52:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:43,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:43,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758979851] [2022-11-16 12:52:43,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758979851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725578349] [2022-11-16 12:52:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:43,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:43,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:43,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeee9d8-7c3d-4e11-85a4-6c6ef8c59fc2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:52:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:43,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:43,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:43,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725578349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:43,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:43,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:52:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946487810] [2022-11-16 12:52:43,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:43,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:52:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:52:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:52:43,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 151 [2022-11-16 12:52:43,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 147 transitions, 550 flow. Second operand has 12 states, 12 states have (on average 117.83333333333333) internal successors, (1414), 12 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:43,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:43,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 151 [2022-11-16 12:52:43,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:00,035 INFO L130 PetriNetUnfolder]: 47374/82065 cut-off events. [2022-11-16 12:53:00,035 INFO L131 PetriNetUnfolder]: For 278316/278776 co-relation queries the response was YES. [2022-11-16 12:53:00,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285168 conditions, 82065 events. 47374/82065 cut-off events. For 278316/278776 co-relation queries the response was YES. Maximal size of possible extension queue 3538. Compared 844434 event pairs, 5459 based on Foata normal form. 1438/77517 useless extension candidates. Maximal degree in co-relation 285130. Up to 14973 conditions per place.