./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:52:03,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:52:03,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:52:03,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:52:03,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:52:03,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:52:03,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:52:03,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:52:03,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:52:03,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:52:03,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:52:03,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:52:03,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:52:03,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:52:03,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:52:03,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:52:03,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:52:03,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:52:03,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:52:03,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:52:03,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:52:03,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:52:03,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:52:03,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:52:03,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:52:03,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:52:03,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:52:03,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:52:03,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:52:03,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:52:03,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:52:03,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:52:03,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:52:03,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:52:03,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:52:03,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:52:03,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:52:03,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:52:03,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:52:03,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:52:03,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:52:03,335 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 19:52:03,348 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:52:03,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:52:03,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:52:03,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:52:03,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:52:03,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:52:03,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:52:03,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:52:03,349 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:52:03,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:52:03,355 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:52:03,356 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:52:03,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:52:03,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:52:03,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:52:03,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:52:03,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:52:03,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:52:03,357 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 19:52:03,357 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:52:03,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:52:03,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:52:03,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:52:03,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:52:03,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:52:03,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:52:03,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:52:03,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:52:03,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:52:03,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:52:03,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:52:03,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:52:03,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:52:03,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:52:03,358 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:52:03,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:52:03,359 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:52:03,359 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-12-13 19:52:03,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:52:03,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:52:03,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:52:03,545 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:52:03,545 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:52:03,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-12-13 19:52:06,140 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:52:06,289 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:52:06,290 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-12-13 19:52:06,294 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/data/69688e7f8/f7cbc30fa2d743c8924cad8887ee75c1/FLAGcd57464db [2022-12-13 19:52:06,701 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/data/69688e7f8/f7cbc30fa2d743c8924cad8887ee75c1 [2022-12-13 19:52:06,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:52:06,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:52:06,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:52:06,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:52:06,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:52:06,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540bf51c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06, skipping insertion in model container [2022-12-13 19:52:06,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:52:06,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:52:06,852 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:06,853 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:06,855 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:06,856 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:06,861 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-12-13 19:52:06,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:52:06,867 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:52:06,877 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:06,877 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:06,878 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:06,878 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:06,881 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-12-13 19:52:06,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:52:06,891 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:52:06,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06 WrapperNode [2022-12-13 19:52:06,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:52:06,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:52:06,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:52:06,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:52:06,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,913 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-12-13 19:52:06,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:52:06,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:52:06,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:52:06,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:52:06,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,927 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:52:06,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:52:06,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:52:06,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:52:06,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (1/1) ... [2022-12-13 19:52:06,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:52:06,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:06,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:52:06,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:52:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:52:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:52:06,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:52:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:52:06,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:52:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:52:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:52:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:52:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 19:52:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 19:52:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:52:06,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:52:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:52:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:52:06,989 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:52:07,062 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:52:07,063 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:52:07,196 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:52:07,265 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:52:07,265 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 19:52:07,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:52:07 BoogieIcfgContainer [2022-12-13 19:52:07,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:52:07,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:52:07,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:52:07,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:52:07,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:52:06" (1/3) ... [2022-12-13 19:52:07,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae27e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:52:07, skipping insertion in model container [2022-12-13 19:52:07,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:06" (2/3) ... [2022-12-13 19:52:07,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae27e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:52:07, skipping insertion in model container [2022-12-13 19:52:07,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:52:07" (3/3) ... [2022-12-13 19:52:07,273 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-12-13 19:52:07,279 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 19:52:07,286 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:52:07,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 19:52:07,287 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:52:07,363 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 19:52:07,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 214 flow [2022-12-13 19:52:07,424 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2022-12-13 19:52:07,424 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:52:07,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-12-13 19:52:07,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 99 transitions, 214 flow [2022-12-13 19:52:07,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 79 transitions, 170 flow [2022-12-13 19:52:07,434 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:52:07,442 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 79 transitions, 170 flow [2022-12-13 19:52:07,444 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 79 transitions, 170 flow [2022-12-13 19:52:07,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 79 transitions, 170 flow [2022-12-13 19:52:07,460 INFO L130 PetriNetUnfolder]: 5/79 cut-off events. [2022-12-13 19:52:07,460 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:52:07,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 5/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-12-13 19:52:07,461 INFO L119 LiptonReduction]: Number of co-enabled transitions 772 [2022-12-13 19:52:09,576 INFO L134 LiptonReduction]: Checked pairs total: 942 [2022-12-13 19:52:09,576 INFO L136 LiptonReduction]: Total number of compositions: 72 [2022-12-13 19:52:09,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:52:09,592 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;@40558a62, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:52:09,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-13 19:52:09,594 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 19:52:09,594 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:52:09,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:09,595 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:52:09,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:09,598 INFO L85 PathProgramCache]: Analyzing trace with hash 12268069, now seen corresponding path program 1 times [2022-12-13 19:52:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:09,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796324247] [2022-12-13 19:52:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:09,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:09,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:09,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796324247] [2022-12-13 19:52:09,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796324247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:09,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:09,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:52:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118016399] [2022-12-13 19:52:09,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:09,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:09,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:09,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:09,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:09,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:52:09,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:09,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:09,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:52:09,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:09,854 INFO L130 PetriNetUnfolder]: 200/300 cut-off events. [2022-12-13 19:52:09,854 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 19:52:09,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 300 events. 200/300 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1094 event pairs, 93 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 531. Up to 293 conditions per place. [2022-12-13 19:52:09,857 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 19 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2022-12-13 19:52:09,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 96 flow [2022-12-13 19:52:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2022-12-13 19:52:09,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5165692007797271 [2022-12-13 19:52:09,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2022-12-13 19:52:09,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2022-12-13 19:52:09,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:09,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2022-12-13 19:52:09,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:09,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:09,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:09,882 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 265 transitions. [2022-12-13 19:52:09,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 96 flow [2022-12-13 19:52:09,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:52:09,885 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 50 flow [2022-12-13 19:52:09,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2022-12-13 19:52:09,889 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2022-12-13 19:52:09,890 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 50 flow [2022-12-13 19:52:09,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:09,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:09,890 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:52:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:52:09,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash 12268114, now seen corresponding path program 1 times [2022-12-13 19:52:09,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:09,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777010014] [2022-12-13 19:52:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:09,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:09,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777010014] [2022-12-13 19:52:09,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777010014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:09,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:09,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:52:09,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486593883] [2022-12-13 19:52:09,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:09,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:09,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:09,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:09,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:09,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 171 [2022-12-13 19:52:09,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:09,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:09,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 171 [2022-12-13 19:52:09,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:10,049 INFO L130 PetriNetUnfolder]: 277/434 cut-off events. [2022-12-13 19:52:10,050 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 19:52:10,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 434 events. 277/434 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1921 event pairs, 100 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 874. Up to 273 conditions per place. [2022-12-13 19:52:10,053 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 35 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-12-13 19:52:10,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 38 transitions, 159 flow [2022-12-13 19:52:10,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 279 transitions. [2022-12-13 19:52:10,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2022-12-13 19:52:10,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 279 transitions. [2022-12-13 19:52:10,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 279 transitions. [2022-12-13 19:52:10,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:10,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 279 transitions. [2022-12-13 19:52:10,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,057 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 50 flow. Second operand 3 states and 279 transitions. [2022-12-13 19:52:10,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 38 transitions, 159 flow [2022-12-13 19:52:10,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:10,058 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 63 flow [2022-12-13 19:52:10,058 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2022-12-13 19:52:10,059 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2022-12-13 19:52:10,059 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 63 flow [2022-12-13 19:52:10,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:10,059 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:52:10,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:52:10,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash 12268070, now seen corresponding path program 1 times [2022-12-13 19:52:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:10,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806489072] [2022-12-13 19:52:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:10,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:10,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806489072] [2022-12-13 19:52:10,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806489072] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:10,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:10,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:52:10,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817438380] [2022-12-13 19:52:10,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:10,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:10,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:10,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:52:10,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:10,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:52:10,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:10,166 INFO L130 PetriNetUnfolder]: 189/301 cut-off events. [2022-12-13 19:52:10,166 INFO L131 PetriNetUnfolder]: For 18/24 co-relation queries the response was YES. [2022-12-13 19:52:10,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 301 events. 189/301 cut-off events. For 18/24 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 1106 event pairs, 46 based on Foata normal form. 6/157 useless extension candidates. Maximal degree in co-relation 662. Up to 253 conditions per place. [2022-12-13 19:52:10,170 INFO L137 encePairwiseOnDemand]: 165/171 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-12-13 19:52:10,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 152 flow [2022-12-13 19:52:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:10,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:10,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 279 transitions. [2022-12-13 19:52:10,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2022-12-13 19:52:10,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 279 transitions. [2022-12-13 19:52:10,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 279 transitions. [2022-12-13 19:52:10,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:10,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 279 transitions. [2022-12-13 19:52:10,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,174 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 63 flow. Second operand 3 states and 279 transitions. [2022-12-13 19:52:10,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 152 flow [2022-12-13 19:52:10,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:10,175 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 75 flow [2022-12-13 19:52:10,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2022-12-13 19:52:10,176 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2022-12-13 19:52:10,176 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 75 flow [2022-12-13 19:52:10,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:10,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:52:10,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:52:10,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:10,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:10,177 INFO L85 PathProgramCache]: Analyzing trace with hash 380311925, now seen corresponding path program 1 times [2022-12-13 19:52:10,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:10,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492841006] [2022-12-13 19:52:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:10,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:10,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:10,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492841006] [2022-12-13 19:52:10,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492841006] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:10,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139374210] [2022-12-13 19:52:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:10,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:10,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:10,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:10,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:52:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:10,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:52:10,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:10,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:52:10,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139374210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:10,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:52:10,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 19:52:10,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268789265] [2022-12-13 19:52:10,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:10,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:52:10,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:10,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:52:10,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:52:10,308 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 171 [2022-12-13 19:52:10,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:10,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 171 [2022-12-13 19:52:10,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:10,382 INFO L130 PetriNetUnfolder]: 177/282 cut-off events. [2022-12-13 19:52:10,383 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-12-13 19:52:10,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 282 events. 177/282 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1054 event pairs, 33 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 702. Up to 211 conditions per place. [2022-12-13 19:52:10,385 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 35 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-12-13 19:52:10,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 181 flow [2022-12-13 19:52:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:52:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:52:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2022-12-13 19:52:10,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5233918128654971 [2022-12-13 19:52:10,387 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2022-12-13 19:52:10,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2022-12-13 19:52:10,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:10,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2022-12-13 19:52:10,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,391 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,391 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 75 flow. Second operand 4 states and 358 transitions. [2022-12-13 19:52:10,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 181 flow [2022-12-13 19:52:10,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:52:10,393 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 71 flow [2022-12-13 19:52:10,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2022-12-13 19:52:10,394 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2022-12-13 19:52:10,394 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 71 flow [2022-12-13 19:52:10,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:10,394 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:52:10,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:52:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:10,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash 380311924, now seen corresponding path program 1 times [2022-12-13 19:52:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:10,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122854640] [2022-12-13 19:52:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:10,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:10,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122854640] [2022-12-13 19:52:10,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122854640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:10,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815969007] [2022-12-13 19:52:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:10,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:10,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:10,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:10,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:52:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:52:10,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:10,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:10,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815969007] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:10,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:10,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:52:10,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083707526] [2022-12-13 19:52:10,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:10,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:52:10,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:10,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:52:10,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:52:10,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 171 [2022-12-13 19:52:10,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 71 flow. Second operand has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:10,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 171 [2022-12-13 19:52:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:10,916 INFO L130 PetriNetUnfolder]: 480/756 cut-off events. [2022-12-13 19:52:10,916 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2022-12-13 19:52:10,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1895 conditions, 756 events. 480/756 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3608 event pairs, 55 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 1887. Up to 265 conditions per place. [2022-12-13 19:52:10,922 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 75 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2022-12-13 19:52:10,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 81 transitions, 391 flow [2022-12-13 19:52:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:52:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:52:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2022-12-13 19:52:10,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5487329434697856 [2022-12-13 19:52:10,925 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2022-12-13 19:52:10,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2022-12-13 19:52:10,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:10,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2022-12-13 19:52:10,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,930 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,930 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 71 flow. Second operand 6 states and 563 transitions. [2022-12-13 19:52:10,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 81 transitions, 391 flow [2022-12-13 19:52:10,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 81 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:52:10,932 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 104 flow [2022-12-13 19:52:10,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2022-12-13 19:52:10,933 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2022-12-13 19:52:10,933 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 104 flow [2022-12-13 19:52:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:10,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:10,934 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:52:10,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:52:11,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:11,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 380311881, now seen corresponding path program 1 times [2022-12-13 19:52:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:11,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798902613] [2022-12-13 19:52:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:11,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:11,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:11,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798902613] [2022-12-13 19:52:11,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798902613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:11,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225307807] [2022-12-13 19:52:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:11,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:11,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:11,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:11,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:52:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:11,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:52:11,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:11,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:11,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225307807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:11,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:11,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2022-12-13 19:52:11,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380937525] [2022-12-13 19:52:11,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:11,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:52:11,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:11,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:52:11,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:52:11,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:52:11,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 25 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 82.33333333333333) internal successors, (494), 6 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:11,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:11,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:52:11,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:11,561 INFO L130 PetriNetUnfolder]: 649/1146 cut-off events. [2022-12-13 19:52:11,561 INFO L131 PetriNetUnfolder]: For 651/663 co-relation queries the response was YES. [2022-12-13 19:52:11,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3080 conditions, 1146 events. 649/1146 cut-off events. For 651/663 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6075 event pairs, 89 based on Foata normal form. 149/1032 useless extension candidates. Maximal degree in co-relation 3069. Up to 300 conditions per place. [2022-12-13 19:52:11,571 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 62 selfloop transitions, 25 changer transitions 0/89 dead transitions. [2022-12-13 19:52:11,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 89 transitions, 511 flow [2022-12-13 19:52:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:52:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:52:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 573 transitions. [2022-12-13 19:52:11,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5584795321637427 [2022-12-13 19:52:11,572 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 573 transitions. [2022-12-13 19:52:11,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 573 transitions. [2022-12-13 19:52:11,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:11,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 573 transitions. [2022-12-13 19:52:11,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.5) internal successors, (573), 6 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:11,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:11,575 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:11,575 INFO L175 Difference]: Start difference. First operand has 35 places, 25 transitions, 104 flow. Second operand 6 states and 573 transitions. [2022-12-13 19:52:11,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 89 transitions, 511 flow [2022-12-13 19:52:11,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 89 transitions, 491 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:11,578 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 345 flow [2022-12-13 19:52:11,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2022-12-13 19:52:11,578 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2022-12-13 19:52:11,578 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 345 flow [2022-12-13 19:52:11,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.33333333333333) internal successors, (494), 6 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:11,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:11,579 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:11,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:52:11,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 19:52:11,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:11,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1858869118, now seen corresponding path program 1 times [2022-12-13 19:52:11,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:11,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772962513] [2022-12-13 19:52:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:11,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:11,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:11,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772962513] [2022-12-13 19:52:11,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772962513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:11,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:11,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:52:11,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729351854] [2022-12-13 19:52:11,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:11,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:11,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:11,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:52:11,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 345 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:11,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:11,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:52:11,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:12,099 INFO L130 PetriNetUnfolder]: 671/1263 cut-off events. [2022-12-13 19:52:12,099 INFO L131 PetriNetUnfolder]: For 2398/2420 co-relation queries the response was YES. [2022-12-13 19:52:12,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4426 conditions, 1263 events. 671/1263 cut-off events. For 2398/2420 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7070 event pairs, 385 based on Foata normal form. 50/1223 useless extension candidates. Maximal degree in co-relation 4409. Up to 1064 conditions per place. [2022-12-13 19:52:12,105 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 59 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2022-12-13 19:52:12,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 591 flow [2022-12-13 19:52:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2022-12-13 19:52:12,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5419103313840156 [2022-12-13 19:52:12,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2022-12-13 19:52:12,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2022-12-13 19:52:12,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:12,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2022-12-13 19:52:12,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:12,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:12,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:12,108 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 345 flow. Second operand 3 states and 278 transitions. [2022-12-13 19:52:12,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 591 flow [2022-12-13 19:52:12,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 541 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-12-13 19:52:12,118 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 355 flow [2022-12-13 19:52:12,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=355, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2022-12-13 19:52:12,119 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2022-12-13 19:52:12,119 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 355 flow [2022-12-13 19:52:12,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:12,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:12,119 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 19:52:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 19:52:12,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash -250780954, now seen corresponding path program 2 times [2022-12-13 19:52:12,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:12,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317444116] [2022-12-13 19:52:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:12,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:12,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:12,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317444116] [2022-12-13 19:52:12,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317444116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:12,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637533771] [2022-12-13 19:52:12,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:52:12,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:12,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:12,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:12,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:52:12,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:52:12,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:52:12,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:52:12,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:12,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:12,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637533771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:12,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:12,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 19:52:12,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505737512] [2022-12-13 19:52:12,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:12,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:52:12,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:52:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:52:12,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:52:12,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 355 flow. Second operand has 12 states, 12 states have (on average 82.16666666666667) internal successors, (986), 12 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:12,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:12,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:52:12,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:12,748 INFO L130 PetriNetUnfolder]: 1535/2867 cut-off events. [2022-12-13 19:52:12,748 INFO L131 PetriNetUnfolder]: For 8563/8721 co-relation queries the response was YES. [2022-12-13 19:52:12,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9957 conditions, 2867 events. 1535/2867 cut-off events. For 8563/8721 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19122 event pairs, 181 based on Foata normal form. 428/2857 useless extension candidates. Maximal degree in co-relation 9938. Up to 739 conditions per place. [2022-12-13 19:52:12,762 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 125 selfloop transitions, 97 changer transitions 0/224 dead transitions. [2022-12-13 19:52:12,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 224 transitions, 1643 flow [2022-12-13 19:52:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:52:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:52:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1161 transitions. [2022-12-13 19:52:12,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5657894736842105 [2022-12-13 19:52:12,764 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1161 transitions. [2022-12-13 19:52:12,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1161 transitions. [2022-12-13 19:52:12,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:12,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1161 transitions. [2022-12-13 19:52:12,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.75) internal successors, (1161), 12 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:12,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 171.0) internal successors, (2223), 13 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:12,769 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 171.0) internal successors, (2223), 13 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:12,769 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 355 flow. Second operand 12 states and 1161 transitions. [2022-12-13 19:52:12,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 224 transitions, 1643 flow [2022-12-13 19:52:12,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 224 transitions, 1585 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-12-13 19:52:12,776 INFO L231 Difference]: Finished difference. Result has 65 places, 124 transitions, 1360 flow [2022-12-13 19:52:12,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1360, PETRI_PLACES=65, PETRI_TRANSITIONS=124} [2022-12-13 19:52:12,776 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2022-12-13 19:52:12,777 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 124 transitions, 1360 flow [2022-12-13 19:52:12,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.16666666666667) internal successors, (986), 12 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:12,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:12,777 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 19:52:12,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:52:12,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:12,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash -250780911, now seen corresponding path program 2 times [2022-12-13 19:52:12,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:12,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929794806] [2022-12-13 19:52:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:13,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:13,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929794806] [2022-12-13 19:52:13,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929794806] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:13,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351245940] [2022-12-13 19:52:13,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:52:13,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:13,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:13,042 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:13,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:52:13,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:52:13,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:52:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:52:13,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:52:13,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:52:13,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351245940] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:13,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:52:13,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-12-13 19:52:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627979151] [2022-12-13 19:52:13,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:13,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:13,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:52:13,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 171 [2022-12-13 19:52:13,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 124 transitions, 1360 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:13,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:13,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 171 [2022-12-13 19:52:13,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:13,358 INFO L130 PetriNetUnfolder]: 1259/2401 cut-off events. [2022-12-13 19:52:13,358 INFO L131 PetriNetUnfolder]: For 8606/8740 co-relation queries the response was YES. [2022-12-13 19:52:13,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9927 conditions, 2401 events. 1259/2401 cut-off events. For 8606/8740 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15853 event pairs, 823 based on Foata normal form. 195/2331 useless extension candidates. Maximal degree in co-relation 9898. Up to 2396 conditions per place. [2022-12-13 19:52:13,371 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 102 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2022-12-13 19:52:13,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 1372 flow [2022-12-13 19:52:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-12-13 19:52:13,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5048732943469786 [2022-12-13 19:52:13,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2022-12-13 19:52:13,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2022-12-13 19:52:13,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:13,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2022-12-13 19:52:13,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:13,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:13,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:13,373 INFO L175 Difference]: Start difference. First operand has 65 places, 124 transitions, 1360 flow. Second operand 3 states and 259 transitions. [2022-12-13 19:52:13,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 1372 flow [2022-12-13 19:52:13,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 105 transitions, 1177 flow, removed 85 selfloop flow, removed 4 redundant places. [2022-12-13 19:52:13,396 INFO L231 Difference]: Finished difference. Result has 62 places, 105 transitions, 973 flow [2022-12-13 19:52:13,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=973, PETRI_PLACES=62, PETRI_TRANSITIONS=105} [2022-12-13 19:52:13,397 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2022-12-13 19:52:13,397 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 105 transitions, 973 flow [2022-12-13 19:52:13,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:13,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:13,397 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:13,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:52:13,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 19:52:13,598 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:13,599 INFO L85 PathProgramCache]: Analyzing trace with hash 811526211, now seen corresponding path program 1 times [2022-12-13 19:52:13,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:13,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40331754] [2022-12-13 19:52:13,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:13,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:13,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:13,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40331754] [2022-12-13 19:52:13,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40331754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:13,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848160335] [2022-12-13 19:52:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:13,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:13,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:13,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:52:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:52:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:13,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:13,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848160335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:13,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:13,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 19:52:13,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941040768] [2022-12-13 19:52:13,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:13,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:52:13,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:52:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:52:13,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 171 [2022-12-13 19:52:13,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 105 transitions, 973 flow. Second operand has 8 states, 8 states have (on average 82.25) internal successors, (658), 8 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:13,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:13,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 171 [2022-12-13 19:52:13,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:14,367 INFO L130 PetriNetUnfolder]: 2052/3740 cut-off events. [2022-12-13 19:52:14,367 INFO L131 PetriNetUnfolder]: For 9642/9653 co-relation queries the response was YES. [2022-12-13 19:52:14,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13955 conditions, 3740 events. 2052/3740 cut-off events. For 9642/9653 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24144 event pairs, 271 based on Foata normal form. 11/3239 useless extension candidates. Maximal degree in co-relation 13928. Up to 1527 conditions per place. [2022-12-13 19:52:14,403 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 185 selfloop transitions, 97 changer transitions 0/283 dead transitions. [2022-12-13 19:52:14,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 283 transitions, 3032 flow [2022-12-13 19:52:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:52:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:52:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 725 transitions. [2022-12-13 19:52:14,405 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5299707602339181 [2022-12-13 19:52:14,405 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 725 transitions. [2022-12-13 19:52:14,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 725 transitions. [2022-12-13 19:52:14,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:14,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 725 transitions. [2022-12-13 19:52:14,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:14,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:14,410 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:14,410 INFO L175 Difference]: Start difference. First operand has 62 places, 105 transitions, 973 flow. Second operand 8 states and 725 transitions. [2022-12-13 19:52:14,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 283 transitions, 3032 flow [2022-12-13 19:52:14,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 283 transitions, 3031 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:14,430 INFO L231 Difference]: Finished difference. Result has 73 places, 185 transitions, 2262 flow [2022-12-13 19:52:14,430 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2262, PETRI_PLACES=73, PETRI_TRANSITIONS=185} [2022-12-13 19:52:14,431 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2022-12-13 19:52:14,431 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 185 transitions, 2262 flow [2022-12-13 19:52:14,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 82.25) internal successors, (658), 8 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:14,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:14,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:14,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:52:14,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:14,632 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1788579960, now seen corresponding path program 1 times [2022-12-13 19:52:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:14,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086558865] [2022-12-13 19:52:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:14,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086558865] [2022-12-13 19:52:14,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086558865] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013348905] [2022-12-13 19:52:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:14,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:14,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:14,688 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:14,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:52:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:52:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:14,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:14,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013348905] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:14,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:52:14,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2022-12-13 19:52:14,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713939884] [2022-12-13 19:52:14,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:14,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:52:14,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:52:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:52:14,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 171 [2022-12-13 19:52:14,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 185 transitions, 2262 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:14,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:14,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 171 [2022-12-13 19:52:14,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:15,198 INFO L130 PetriNetUnfolder]: 1652/3154 cut-off events. [2022-12-13 19:52:15,198 INFO L131 PetriNetUnfolder]: For 16782/16793 co-relation queries the response was YES. [2022-12-13 19:52:15,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12755 conditions, 3154 events. 1652/3154 cut-off events. For 16782/16793 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20740 event pairs, 439 based on Foata normal form. 349/3407 useless extension candidates. Maximal degree in co-relation 12722. Up to 2967 conditions per place. [2022-12-13 19:52:15,210 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 151 selfloop transitions, 5 changer transitions 0/157 dead transitions. [2022-12-13 19:52:15,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 157 transitions, 2094 flow [2022-12-13 19:52:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:52:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:52:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2022-12-13 19:52:15,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5102339181286549 [2022-12-13 19:52:15,212 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 349 transitions. [2022-12-13 19:52:15,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 349 transitions. [2022-12-13 19:52:15,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:15,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 349 transitions. [2022-12-13 19:52:15,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,213 INFO L175 Difference]: Start difference. First operand has 73 places, 185 transitions, 2262 flow. Second operand 4 states and 349 transitions. [2022-12-13 19:52:15,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 157 transitions, 2094 flow [2022-12-13 19:52:15,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 157 transitions, 2044 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-12-13 19:52:15,238 INFO L231 Difference]: Finished difference. Result has 77 places, 141 transitions, 1654 flow [2022-12-13 19:52:15,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1654, PETRI_PLACES=77, PETRI_TRANSITIONS=141} [2022-12-13 19:52:15,238 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2022-12-13 19:52:15,238 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 141 transitions, 1654 flow [2022-12-13 19:52:15,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:15,238 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:15,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:52:15,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:15,440 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2100136231, now seen corresponding path program 2 times [2022-12-13 19:52:15,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:15,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495364557] [2022-12-13 19:52:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:15,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:52:15,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:15,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495364557] [2022-12-13 19:52:15,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495364557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:15,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:15,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:52:15,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084319790] [2022-12-13 19:52:15,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:15,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:15,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:15,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:15,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:15,524 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 171 [2022-12-13 19:52:15,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 141 transitions, 1654 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:15,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 171 [2022-12-13 19:52:15,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:15,829 INFO L130 PetriNetUnfolder]: 1473/2807 cut-off events. [2022-12-13 19:52:15,829 INFO L131 PetriNetUnfolder]: For 16720/16913 co-relation queries the response was YES. [2022-12-13 19:52:15,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10998 conditions, 2807 events. 1473/2807 cut-off events. For 16720/16913 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18506 event pairs, 945 based on Foata normal form. 296/3020 useless extension candidates. Maximal degree in co-relation 10963. Up to 2799 conditions per place. [2022-12-13 19:52:15,841 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 122 selfloop transitions, 1 changer transitions 0/127 dead transitions. [2022-12-13 19:52:15,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 127 transitions, 1698 flow [2022-12-13 19:52:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2022-12-13 19:52:15,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5009746588693957 [2022-12-13 19:52:15,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2022-12-13 19:52:15,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2022-12-13 19:52:15,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:15,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2022-12-13 19:52:15,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,845 INFO L175 Difference]: Start difference. First operand has 77 places, 141 transitions, 1654 flow. Second operand 3 states and 257 transitions. [2022-12-13 19:52:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 127 transitions, 1698 flow [2022-12-13 19:52:15,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 127 transitions, 1653 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 19:52:15,885 INFO L231 Difference]: Finished difference. Result has 76 places, 127 transitions, 1409 flow [2022-12-13 19:52:15,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=1409, PETRI_PLACES=76, PETRI_TRANSITIONS=127} [2022-12-13 19:52:15,886 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2022-12-13 19:52:15,886 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 127 transitions, 1409 flow [2022-12-13 19:52:15,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:15,886 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:15,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 19:52:15,887 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:15,887 INFO L85 PathProgramCache]: Analyzing trace with hash 912407655, now seen corresponding path program 1 times [2022-12-13 19:52:15,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:15,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514567618] [2022-12-13 19:52:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:15,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:15,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:15,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514567618] [2022-12-13 19:52:15,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514567618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:15,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:15,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:52:15,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436657741] [2022-12-13 19:52:15,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:15,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:15,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:15,987 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2022-12-13 19:52:15,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 127 transitions, 1409 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:15,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:15,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2022-12-13 19:52:15,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:16,264 INFO L130 PetriNetUnfolder]: 1473/2729 cut-off events. [2022-12-13 19:52:16,264 INFO L131 PetriNetUnfolder]: For 13840/13978 co-relation queries the response was YES. [2022-12-13 19:52:16,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10561 conditions, 2729 events. 1473/2729 cut-off events. For 13840/13978 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17428 event pairs, 945 based on Foata normal form. 131/2855 useless extension candidates. Maximal degree in co-relation 10526. Up to 2721 conditions per place. [2022-12-13 19:52:16,275 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 121 selfloop transitions, 1 changer transitions 0/126 dead transitions. [2022-12-13 19:52:16,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 126 transitions, 1651 flow [2022-12-13 19:52:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2022-12-13 19:52:16,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4756335282651072 [2022-12-13 19:52:16,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2022-12-13 19:52:16,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2022-12-13 19:52:16,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:16,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2022-12-13 19:52:16,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:16,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:16,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:16,277 INFO L175 Difference]: Start difference. First operand has 76 places, 127 transitions, 1409 flow. Second operand 3 states and 244 transitions. [2022-12-13 19:52:16,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 126 transitions, 1651 flow [2022-12-13 19:52:16,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 126 transitions, 1650 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:16,306 INFO L231 Difference]: Finished difference. Result has 76 places, 126 transitions, 1408 flow [2022-12-13 19:52:16,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1408, PETRI_PLACES=76, PETRI_TRANSITIONS=126} [2022-12-13 19:52:16,307 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2022-12-13 19:52:16,307 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 126 transitions, 1408 flow [2022-12-13 19:52:16,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:16,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:16,308 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:16,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 19:52:16,308 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash 912407636, now seen corresponding path program 1 times [2022-12-13 19:52:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:16,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204943880] [2022-12-13 19:52:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:16,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:16,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204943880] [2022-12-13 19:52:16,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204943880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:16,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:16,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:52:16,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489487421] [2022-12-13 19:52:16,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:16,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:16,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:16,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:16,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:16,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2022-12-13 19:52:16,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 126 transitions, 1408 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:16,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:16,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2022-12-13 19:52:16,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:16,724 INFO L130 PetriNetUnfolder]: 1473/2651 cut-off events. [2022-12-13 19:52:16,724 INFO L131 PetriNetUnfolder]: For 13840/13978 co-relation queries the response was YES. [2022-12-13 19:52:16,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10406 conditions, 2651 events. 1473/2651 cut-off events. For 13840/13978 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16371 event pairs, 945 based on Foata normal form. 209/2855 useless extension candidates. Maximal degree in co-relation 10370. Up to 2643 conditions per place. [2022-12-13 19:52:16,732 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 119 selfloop transitions, 1 changer transitions 1/125 dead transitions. [2022-12-13 19:52:16,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 125 transitions, 1648 flow [2022-12-13 19:52:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2022-12-13 19:52:16,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2022-12-13 19:52:16,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2022-12-13 19:52:16,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2022-12-13 19:52:16,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:16,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2022-12-13 19:52:16,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:16,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:16,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:16,734 INFO L175 Difference]: Start difference. First operand has 76 places, 126 transitions, 1408 flow. Second operand 3 states and 243 transitions. [2022-12-13 19:52:16,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 125 transitions, 1648 flow [2022-12-13 19:52:16,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 125 transitions, 1647 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:16,751 INFO L231 Difference]: Finished difference. Result has 76 places, 124 transitions, 1404 flow [2022-12-13 19:52:16,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1404, PETRI_PLACES=76, PETRI_TRANSITIONS=124} [2022-12-13 19:52:16,751 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2022-12-13 19:52:16,751 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 124 transitions, 1404 flow [2022-12-13 19:52:16,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:16,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:16,752 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-12-13 19:52:16,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 19:52:16,752 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1512327162, now seen corresponding path program 3 times [2022-12-13 19:52:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769486427] [2022-12-13 19:52:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:16,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:16,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:16,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769486427] [2022-12-13 19:52:16,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769486427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:16,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579283007] [2022-12-13 19:52:16,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:52:16,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:16,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:16,868 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:16,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:52:16,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 19:52:16,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:52:16,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 19:52:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:16,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:17,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579283007] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:17,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:17,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-12-13 19:52:17,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72193221] [2022-12-13 19:52:17,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:17,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:52:17,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:17,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:52:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:52:17,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:52:17,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 124 transitions, 1404 flow. Second operand has 24 states, 24 states have (on average 82.08333333333333) internal successors, (1970), 24 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:17,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:17,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:52:17,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:18,077 INFO L130 PetriNetUnfolder]: 3148/5540 cut-off events. [2022-12-13 19:52:18,077 INFO L131 PetriNetUnfolder]: For 109438/109799 co-relation queries the response was YES. [2022-12-13 19:52:18,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20223 conditions, 5540 events. 3148/5540 cut-off events. For 109438/109799 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 33849 event pairs, 377 based on Foata normal form. 1113/6649 useless extension candidates. Maximal degree in co-relation 20186. Up to 1127 conditions per place. [2022-12-13 19:52:18,108 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 121 selfloop transitions, 253 changer transitions 66/444 dead transitions. [2022-12-13 19:52:18,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 444 transitions, 4359 flow [2022-12-13 19:52:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 19:52:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 19:52:18,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2199 transitions. [2022-12-13 19:52:18,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5358187134502924 [2022-12-13 19:52:18,111 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2199 transitions. [2022-12-13 19:52:18,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2199 transitions. [2022-12-13 19:52:18,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:18,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2199 transitions. [2022-12-13 19:52:18,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 91.625) internal successors, (2199), 24 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:18,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:18,118 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:18,118 INFO L175 Difference]: Start difference. First operand has 76 places, 124 transitions, 1404 flow. Second operand 24 states and 2199 transitions. [2022-12-13 19:52:18,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 444 transitions, 4359 flow [2022-12-13 19:52:18,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 444 transitions, 4358 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:18,146 INFO L231 Difference]: Finished difference. Result has 119 places, 290 transitions, 4286 flow [2022-12-13 19:52:18,146 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4286, PETRI_PLACES=119, PETRI_TRANSITIONS=290} [2022-12-13 19:52:18,146 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2022-12-13 19:52:18,146 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 290 transitions, 4286 flow [2022-12-13 19:52:18,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 82.08333333333333) internal successors, (1970), 24 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:18,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:18,147 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2022-12-13 19:52:18,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:52:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:52:18,348 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1475697222, now seen corresponding path program 4 times [2022-12-13 19:52:18,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:18,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407232368] [2022-12-13 19:52:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:18,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:18,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:18,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407232368] [2022-12-13 19:52:18,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407232368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:18,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569204902] [2022-12-13 19:52:18,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:52:18,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:18,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:18,672 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:18,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:52:18,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:52:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:52:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 19:52:18,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:18,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:19,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569204902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:19,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:19,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2022-12-13 19:52:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634936430] [2022-12-13 19:52:19,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:19,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 19:52:19,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:19,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 19:52:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 19:52:19,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:52:19,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 290 transitions, 4286 flow. Second operand has 48 states, 48 states have (on average 82.04166666666667) internal successors, (3938), 48 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:19,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:19,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:52:19,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:22,762 INFO L130 PetriNetUnfolder]: 7836/13768 cut-off events. [2022-12-13 19:52:22,762 INFO L131 PetriNetUnfolder]: For 1013698/1014419 co-relation queries the response was YES. [2022-12-13 19:52:22,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58188 conditions, 13768 events. 7836/13768 cut-off events. For 1013698/1014419 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 88332 event pairs, 589 based on Foata normal form. 2241/16005 useless extension candidates. Maximal degree in co-relation 58128. Up to 3771 conditions per place. [2022-12-13 19:52:22,828 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 219 selfloop transitions, 729 changer transitions 138/1090 dead transitions. [2022-12-13 19:52:22,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1090 transitions, 13755 flow [2022-12-13 19:52:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 19:52:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 19:52:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4407 transitions. [2022-12-13 19:52:22,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5369152046783626 [2022-12-13 19:52:22,835 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4407 transitions. [2022-12-13 19:52:22,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4407 transitions. [2022-12-13 19:52:22,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:22,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4407 transitions. [2022-12-13 19:52:22,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 91.8125) internal successors, (4407), 48 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:22,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 171.0) internal successors, (8379), 49 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:22,853 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 171.0) internal successors, (8379), 49 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:22,853 INFO L175 Difference]: Start difference. First operand has 119 places, 290 transitions, 4286 flow. Second operand 48 states and 4407 transitions. [2022-12-13 19:52:22,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1090 transitions, 13755 flow [2022-12-13 19:52:23,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 1090 transitions, 11461 flow, removed 1147 selfloop flow, removed 0 redundant places. [2022-12-13 19:52:23,034 INFO L231 Difference]: Finished difference. Result has 212 places, 768 transitions, 11737 flow [2022-12-13 19:52:23,034 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=3788, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=11737, PETRI_PLACES=212, PETRI_TRANSITIONS=768} [2022-12-13 19:52:23,034 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 183 predicate places. [2022-12-13 19:52:23,034 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 768 transitions, 11737 flow [2022-12-13 19:52:23,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 82.04166666666667) internal successors, (3938), 48 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:23,035 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:23,035 INFO L209 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2022-12-13 19:52:23,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:52:23,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:52:23,237 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:23,238 INFO L85 PathProgramCache]: Analyzing trace with hash 190086854, now seen corresponding path program 5 times [2022-12-13 19:52:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:23,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405709385] [2022-12-13 19:52:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:23,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:24,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:24,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405709385] [2022-12-13 19:52:24,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405709385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:24,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922845553] [2022-12-13 19:52:24,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:52:24,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:24,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:24,358 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:24,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:52:24,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 19:52:24,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:52:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 19:52:24,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:24,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:26,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922845553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:26,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:26,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2022-12-13 19:52:26,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114237008] [2022-12-13 19:52:26,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:26,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-12-13 19:52:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-12-13 19:52:26,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2022-12-13 19:52:26,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:52:26,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 768 transitions, 11737 flow. Second operand has 96 states, 96 states have (on average 82.02083333333333) internal successors, (7874), 96 states have internal predecessors, (7874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:26,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:26,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:52:26,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:41,513 INFO L130 PetriNetUnfolder]: 21836/38316 cut-off events. [2022-12-13 19:52:41,513 INFO L131 PetriNetUnfolder]: For 8789239/8790680 co-relation queries the response was YES. [2022-12-13 19:52:41,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163436 conditions, 38316 events. 21836/38316 cut-off events. For 8789239/8790680 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 262496 event pairs, 965 based on Foata normal form. 4497/42809 useless extension candidates. Maximal degree in co-relation 163328. Up to 10347 conditions per place. [2022-12-13 19:52:41,920 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 413 selfloop transitions, 2261 changer transitions 282/2960 dead transitions. [2022-12-13 19:52:41,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 2960 transitions, 40366 flow [2022-12-13 19:52:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 19:52:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-12-13 19:52:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8823 transitions. [2022-12-13 19:52:41,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5374634502923976 [2022-12-13 19:52:41,928 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8823 transitions. [2022-12-13 19:52:41,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8823 transitions. [2022-12-13 19:52:41,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:41,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8823 transitions. [2022-12-13 19:52:41,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 91.90625) internal successors, (8823), 96 states have internal predecessors, (8823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:41,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 171.0) internal successors, (16587), 97 states have internal predecessors, (16587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:41,949 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 171.0) internal successors, (16587), 97 states have internal predecessors, (16587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:41,950 INFO L175 Difference]: Start difference. First operand has 212 places, 768 transitions, 11737 flow. Second operand 96 states and 8823 transitions. [2022-12-13 19:52:41,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 2960 transitions, 40366 flow [2022-12-13 19:52:43,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 2960 transitions, 32543 flow, removed 3755 selfloop flow, removed 8 redundant places. [2022-12-13 19:52:43,578 INFO L231 Difference]: Finished difference. Result has 393 places, 2302 transitions, 34679 flow [2022-12-13 19:52:43,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=10390, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=741, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=34679, PETRI_PLACES=393, PETRI_TRANSITIONS=2302} [2022-12-13 19:52:43,579 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 364 predicate places. [2022-12-13 19:52:43,579 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 2302 transitions, 34679 flow [2022-12-13 19:52:43,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 82.02083333333333) internal successors, (7874), 96 states have internal predecessors, (7874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:43,580 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:43,580 INFO L209 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2022-12-13 19:52:43,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:52:43,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 19:52:43,782 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:52:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash 746735558, now seen corresponding path program 6 times [2022-12-13 19:52:43,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:43,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096035744] [2022-12-13 19:52:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:43,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:47,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:47,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096035744] [2022-12-13 19:52:47,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096035744] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:47,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644406795] [2022-12-13 19:52:47,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:52:47,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:47,327 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:47,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:52:47,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2022-12-13 19:52:47,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:52:47,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 19:52:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:47,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:53,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644406795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:53,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:53,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 190 [2022-12-13 19:52:53,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684424160] [2022-12-13 19:52:53,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:53,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-12-13 19:52:53,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:53,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-12-13 19:52:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2022-12-13 19:52:53,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:52:53,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 2302 transitions, 34679 flow. Second operand has 192 states, 192 states have (on average 82.01041666666667) internal successors, (15746), 192 states have internal predecessors, (15746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:53,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:53,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:52:53,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:54:39,763 INFO L130 PetriNetUnfolder]: 68284/119696 cut-off events. [2022-12-13 19:54:39,764 INFO L131 PetriNetUnfolder]: For 70501571/70504452 co-relation queries the response was YES. [2022-12-13 19:54:42,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509316 conditions, 119696 events. 68284/119696 cut-off events. For 70501571/70504452 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 891715 event pairs, 1781 based on Foata normal form. 9009/128701 useless extension candidates. Maximal degree in co-relation 509120. Up to 32139 conditions per place. [2022-12-13 19:54:42,975 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 799 selfloop transitions, 7633 changer transitions 570/9006 dead transitions. [2022-12-13 19:54:42,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 9006 transitions, 130432 flow [2022-12-13 19:54:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-13 19:54:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2022-12-13 19:54:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 17655 transitions. [2022-12-13 19:54:42,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5377375730994152 [2022-12-13 19:54:42,990 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 17655 transitions. [2022-12-13 19:54:42,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 17655 transitions. [2022-12-13 19:54:42,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:54:42,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 17655 transitions. [2022-12-13 19:54:43,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 91.953125) internal successors, (17655), 192 states have internal predecessors, (17655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:43,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 171.0) internal successors, (33003), 193 states have internal predecessors, (33003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:43,032 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 171.0) internal successors, (33003), 193 states have internal predecessors, (33003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:43,033 INFO L175 Difference]: Start difference. First operand has 393 places, 2302 transitions, 34679 flow. Second operand 192 states and 17655 transitions. [2022-12-13 19:54:43,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 9006 transitions, 130432 flow [2022-12-13 19:54:58,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 9006 transitions, 102769 flow, removed 13283 selfloop flow, removed 20 redundant places. [2022-12-13 19:54:58,346 INFO L231 Difference]: Finished difference. Result has 754 places, 7676 transitions, 113245 flow [2022-12-13 19:54:58,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=31492, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=113245, PETRI_PLACES=754, PETRI_TRANSITIONS=7676} [2022-12-13 19:54:58,348 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 725 predicate places. [2022-12-13 19:54:58,348 INFO L495 AbstractCegarLoop]: Abstraction has has 754 places, 7676 transitions, 113245 flow [2022-12-13 19:54:58,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 82.01041666666667) internal successors, (15746), 192 states have internal predecessors, (15746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:58,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:54:58,349 INFO L209 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2022-12-13 19:54:58,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 19:54:58,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 19:54:58,550 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 19:54:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2036606522, now seen corresponding path program 7 times [2022-12-13 19:54:58,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:58,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480451477] [2022-12-13 19:54:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:58,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:12,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480451477] [2022-12-13 19:55:12,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480451477] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:55:12,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997253297] [2022-12-13 19:55:12,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:55:12,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:55:12,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:55:12,562 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:55:12,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d28966-6c30-4a24-a4f4-fe3138090ad5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:55:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:12,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 193 conjunts are in the unsatisfiable core [2022-12-13 19:55:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:55:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:13,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:55:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:39,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997253297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:55:39,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:55:39,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 382 [2022-12-13 19:55:39,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974025020] [2022-12-13 19:55:39,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:55:39,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-12-13 19:55:39,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-12-13 19:55:39,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2022-12-13 19:55:41,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2022-12-13 19:55:41,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 7676 transitions, 113245 flow. Second operand has 384 states, 384 states have (on average 82.00520833333333) internal successors, (31490), 384 states have internal predecessors, (31490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:41,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:41,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2022-12-13 19:55:41,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand