./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a 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_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 16:59:58,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:59:58,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:59:58,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:59:58,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:59:58,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:59:58,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:59:58,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:59:58,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:59:58,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:59:58,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:59:58,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:59:58,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:59:58,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:59:58,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:59:58,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:59:58,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:59:58,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:59:58,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:59:58,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:59:58,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:59:58,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:59:58,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:59:58,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:59:58,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:59:58,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:59:58,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:59:58,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:59:58,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:59:58,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:59:58,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:59:58,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:59:58,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:59:58,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:59:58,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:59:58,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:59:58,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:59:58,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:59:58,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:59:58,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:59:58,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:59:58,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 16:59:58,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:59:58,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:59:58,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:59:58,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:59:58,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:59:58,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:59:58,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:59:58,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:59:58,988 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:59:58,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:59:58,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:59:58,990 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 16:59:58,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:59:58,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:59:58,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:59:58,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:59:58,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:59:58,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:59:58,992 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 16:59:58,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:59:58,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:59:58,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:59:58,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:59:58,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:59:58,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:59:58,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:59:58,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:59:58,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:59:58,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:59:58,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:59:58,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:59:58,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:59:58,995 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:59:58,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:59:58,996 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:59:58,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:59:58,996 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_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2022-11-25 16:59:59,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:59:59,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:59:59,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:59:59,274 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:59:59,275 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:59:59,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-11-25 17:00:02,306 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:00:02,536 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:00:02,537 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-11-25 17:00:02,556 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/data/469278908/198931b82f344e7bb047ecccb6fea63a/FLAG3df841b57 [2022-11-25 17:00:02,573 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/data/469278908/198931b82f344e7bb047ecccb6fea63a [2022-11-25 17:00:02,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:00:02,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:00:02,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:00:02,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:00:02,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:00:02,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be370ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02, skipping insertion in model container [2022-11-25 17:00:02,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:00:02,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:00:02,783 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:00:02,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:00:02,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:00:02,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:00:02,793 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:00:02,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:00:02,812 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_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-11-25 17:00:02,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:00:02,834 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:00:02,849 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:00:02,851 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:00:02,852 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:00:02,853 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:00:02,854 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:00:02,856 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:00:02,861 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_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-11-25 17:00:02,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:00:02,880 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:00:02,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02 WrapperNode [2022-11-25 17:00:02,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:00:02,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:00:02,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:00:02,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:00:02,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,941 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 175 [2022-11-25 17:00:02,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:00:02,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:00:02,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:00:02,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:00:02,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,973 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:00:02,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:00:02,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:00:02,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:00:02,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (1/1) ... [2022-11-25 17:00:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:00:02,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:03,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:00:03,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:00:03,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:00:03,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:00:03,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:00:03,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:00:03,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:00:03,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:00:03,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:00:03,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:00:03,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:00:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:00:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:00:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:00:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:00:03,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:00:03,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:00:03,060 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:00:03,163 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:00:03,166 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:00:03,563 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:00:03,799 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:00:03,800 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:00:03,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:00:03 BoogieIcfgContainer [2022-11-25 17:00:03,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:00:03,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:00:03,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:00:03,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:00:03,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:00:02" (1/3) ... [2022-11-25 17:00:03,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258e0c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:00:03, skipping insertion in model container [2022-11-25 17:00:03,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:00:02" (2/3) ... [2022-11-25 17:00:03,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258e0c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:00:03, skipping insertion in model container [2022-11-25 17:00:03,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:00:03" (3/3) ... [2022-11-25 17:00:03,840 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-11-25 17:00:03,852 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:00:03,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:00:03,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-25 17:00:03,865 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:00:03,976 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:00:04,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 162 transitions, 340 flow [2022-11-25 17:00:04,109 INFO L130 PetriNetUnfolder]: 11/160 cut-off events. [2022-11-25 17:00:04,110 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:00:04,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 11/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 146 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2022-11-25 17:00:04,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 162 transitions, 340 flow [2022-11-25 17:00:04,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 141 transitions, 291 flow [2022-11-25 17:00:04,128 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:00:04,146 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 141 transitions, 291 flow [2022-11-25 17:00:04,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 141 transitions, 291 flow [2022-11-25 17:00:04,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 141 transitions, 291 flow [2022-11-25 17:00:04,197 INFO L130 PetriNetUnfolder]: 10/141 cut-off events. [2022-11-25 17:00:04,197 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:00:04,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 141 events. 10/141 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2022-11-25 17:00:04,201 INFO L119 LiptonReduction]: Number of co-enabled transitions 1350 [2022-11-25 17:00:13,952 INFO L134 LiptonReduction]: Checked pairs total: 1646 [2022-11-25 17:00:13,952 INFO L136 LiptonReduction]: Total number of compositions: 162 [2022-11-25 17:00:13,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:00:13,977 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;@25a513f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:00:13,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-11-25 17:00:13,980 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:00:13,980 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:00:13,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:13,981 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:00:13,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash 23971, now seen corresponding path program 1 times [2022-11-25 17:00:13,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:13,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234143676] [2022-11-25 17:00:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:13,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:14,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234143676] [2022-11-25 17:00:14,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234143676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:14,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:14,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:00:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041594760] [2022-11-25 17:00:14,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:14,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:14,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:14,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:14,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:14,344 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2022-11-25 17:00:14,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:14,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:14,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2022-11-25 17:00:14,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:14,573 INFO L130 PetriNetUnfolder]: 435/661 cut-off events. [2022-11-25 17:00:14,574 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-25 17:00:14,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 661 events. 435/661 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3011 event pairs, 244 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 617. Up to 332 conditions per place. [2022-11-25 17:00:14,582 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-11-25 17:00:14,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 192 flow [2022-11-25 17:00:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2022-11-25 17:00:14,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2022-11-25 17:00:14,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2022-11-25 17:00:14,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2022-11-25 17:00:14,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:14,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2022-11-25 17:00:14,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:14,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:14,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:14,649 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 63 flow. Second operand 3 states and 462 transitions. [2022-11-25 17:00:14,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 192 flow [2022-11-25 17:00:14,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 44 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:00:14,658 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 66 flow [2022-11-25 17:00:14,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2022-11-25 17:00:14,667 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2022-11-25 17:00:14,668 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 66 flow [2022-11-25 17:00:14,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:14,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:14,675 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:00:14,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:00:14,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 744039, now seen corresponding path program 1 times [2022-11-25 17:00:14,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:14,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685171042] [2022-11-25 17:00:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:14,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:14,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:14,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685171042] [2022-11-25 17:00:14,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685171042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:14,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:14,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:00:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131281338] [2022-11-25 17:00:14,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:14,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:14,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:14,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:14,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:14,879 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2022-11-25 17:00:14,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:14,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:14,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2022-11-25 17:00:14,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:15,063 INFO L130 PetriNetUnfolder]: 435/660 cut-off events. [2022-11-25 17:00:15,064 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 17:00:15,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 660 events. 435/660 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3016 event pairs, 244 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 676. Up to 658 conditions per place. [2022-11-25 17:00:15,069 INFO L137 encePairwiseOnDemand]: 322/324 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2022-11-25 17:00:15,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 108 flow [2022-11-25 17:00:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2022-11-25 17:00:15,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44650205761316875 [2022-11-25 17:00:15,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2022-11-25 17:00:15,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2022-11-25 17:00:15,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:15,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2022-11-25 17:00:15,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:15,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:15,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:15,077 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 66 flow. Second operand 3 states and 434 transitions. [2022-11-25 17:00:15,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 108 flow [2022-11-25 17:00:15,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:15,079 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 62 flow [2022-11-25 17:00:15,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2022-11-25 17:00:15,080 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2022-11-25 17:00:15,080 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 62 flow [2022-11-25 17:00:15,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:15,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:15,081 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:00:15,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:00:15,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:15,082 INFO L85 PathProgramCache]: Analyzing trace with hash 744046, now seen corresponding path program 1 times [2022-11-25 17:00:15,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:15,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619936419] [2022-11-25 17:00:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:15,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:15,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619936419] [2022-11-25 17:00:15,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619936419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:15,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34498084] [2022-11-25 17:00:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:15,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:15,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:15,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:15,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:00:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:00:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:15,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:15,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34498084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:15,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:15,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 17:00:15,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420979689] [2022-11-25 17:00:15,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:15,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:00:15,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:00:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:00:15,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2022-11-25 17:00:15,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:15,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:15,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2022-11-25 17:00:15,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:15,900 INFO L130 PetriNetUnfolder]: 1086/1647 cut-off events. [2022-11-25 17:00:15,900 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 17:00:15,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 1647 events. 1086/1647 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 8757 event pairs, 610 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 3368. Up to 331 conditions per place. [2022-11-25 17:00:15,912 INFO L137 encePairwiseOnDemand]: 321/324 looper letters, 97 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2022-11-25 17:00:15,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 103 transitions, 446 flow [2022-11-25 17:00:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:00:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:00:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2022-11-25 17:00:15,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2022-11-25 17:00:15,917 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2022-11-25 17:00:15,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2022-11-25 17:00:15,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:15,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2022-11-25 17:00:15,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:15,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:15,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:15,926 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 62 flow. Second operand 6 states and 927 transitions. [2022-11-25 17:00:15,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 103 transitions, 446 flow [2022-11-25 17:00:15,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 103 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:15,930 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 97 flow [2022-11-25 17:00:15,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2022-11-25 17:00:15,933 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2022-11-25 17:00:15,934 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 97 flow [2022-11-25 17:00:15,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:15,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:15,936 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:00:15,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:00:16,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 17:00:16,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash 715415663, now seen corresponding path program 1 times [2022-11-25 17:00:16,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:16,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167040312] [2022-11-25 17:00:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:16,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:16,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167040312] [2022-11-25 17:00:16,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167040312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:16,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:16,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:00:16,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030409111] [2022-11-25 17:00:16,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:16,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:00:16,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:16,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:00:16,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:00:16,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2022-11-25 17:00:16,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:16,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:16,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2022-11-25 17:00:16,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:16,718 INFO L130 PetriNetUnfolder]: 870/1328 cut-off events. [2022-11-25 17:00:16,719 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-25 17:00:16,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2741 conditions, 1328 events. 870/1328 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 6978 event pairs, 489 based on Foata normal form. 7/539 useless extension candidates. Maximal degree in co-relation 2729. Up to 1315 conditions per place. [2022-11-25 17:00:16,729 INFO L137 encePairwiseOnDemand]: 310/324 looper letters, 24 selfloop transitions, 2 changer transitions 6/33 dead transitions. [2022-11-25 17:00:16,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 33 transitions, 176 flow [2022-11-25 17:00:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:00:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:00:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2022-11-25 17:00:16,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-11-25 17:00:16,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2022-11-25 17:00:16,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2022-11-25 17:00:16,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:16,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2022-11-25 17:00:16,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:16,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:16,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:16,739 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 97 flow. Second operand 4 states and 576 transitions. [2022-11-25 17:00:16,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 33 transitions, 176 flow [2022-11-25 17:00:16,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 168 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:16,743 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 119 flow [2022-11-25 17:00:16,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2022-11-25 17:00:16,746 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2022-11-25 17:00:16,746 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 119 flow [2022-11-25 17:00:16,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:16,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:16,747 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:00:16,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:00:16,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 691760810, now seen corresponding path program 2 times [2022-11-25 17:00:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:16,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127579703] [2022-11-25 17:00:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:16,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:16,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127579703] [2022-11-25 17:00:16,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127579703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:16,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550523996] [2022-11-25 17:00:16,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:00:16,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:16,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:16,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:00:16,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:00:16,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:16,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:00:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:00:17,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:17,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550523996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:17,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:17,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-25 17:00:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204052328] [2022-11-25 17:00:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:17,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:17,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:17,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:00:17,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-11-25 17:00:17,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:17,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-11-25 17:00:17,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:17,303 INFO L130 PetriNetUnfolder]: 869/1318 cut-off events. [2022-11-25 17:00:17,303 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-11-25 17:00:17,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3689 conditions, 1318 events. 869/1318 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 6915 event pairs, 488 based on Foata normal form. 1/519 useless extension candidates. Maximal degree in co-relation 3674. Up to 1314 conditions per place. [2022-11-25 17:00:17,314 INFO L137 encePairwiseOnDemand]: 322/324 looper letters, 24 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-11-25 17:00:17,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 159 flow [2022-11-25 17:00:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2022-11-25 17:00:17,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.448559670781893 [2022-11-25 17:00:17,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2022-11-25 17:00:17,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2022-11-25 17:00:17,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:17,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2022-11-25 17:00:17,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,322 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 119 flow. Second operand 3 states and 436 transitions. [2022-11-25 17:00:17,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 159 flow [2022-11-25 17:00:17,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 143 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-25 17:00:17,325 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 95 flow [2022-11-25 17:00:17,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2022-11-25 17:00:17,326 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-11-25 17:00:17,326 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 95 flow [2022-11-25 17:00:17,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:17,327 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:00:17,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:17,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:17,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash 692125058, now seen corresponding path program 1 times [2022-11-25 17:00:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:17,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876987083] [2022-11-25 17:00:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:17,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876987083] [2022-11-25 17:00:17,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876987083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:17,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117690541] [2022-11-25 17:00:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:17,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:17,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:17,670 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:17,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:00:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:17,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:00:17,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:17,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:17,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117690541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:17,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:17,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-25 17:00:17,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578183482] [2022-11-25 17:00:17,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:17,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:17,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:17,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:17,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:00:17,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-11-25 17:00:17,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:17,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-11-25 17:00:17,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:17,959 INFO L130 PetriNetUnfolder]: 513/802 cut-off events. [2022-11-25 17:00:17,959 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-25 17:00:17,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2222 conditions, 802 events. 513/802 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 3829 event pairs, 284 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 2211. Up to 798 conditions per place. [2022-11-25 17:00:17,966 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 21 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2022-11-25 17:00:17,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 23 transitions, 127 flow [2022-11-25 17:00:17,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2022-11-25 17:00:17,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44753086419753085 [2022-11-25 17:00:17,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2022-11-25 17:00:17,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2022-11-25 17:00:17,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:17,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2022-11-25 17:00:17,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,974 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 95 flow. Second operand 3 states and 435 transitions. [2022-11-25 17:00:17,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 23 transitions, 127 flow [2022-11-25 17:00:17,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 23 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:17,976 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 84 flow [2022-11-25 17:00:17,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2022-11-25 17:00:17,979 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2022-11-25 17:00:17,980 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 84 flow [2022-11-25 17:00:17,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:17,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:17,980 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:00:17,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:18,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:18,187 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 692125070, now seen corresponding path program 1 times [2022-11-25 17:00:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198830338] [2022-11-25 17:00:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:18,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198830338] [2022-11-25 17:00:18,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198830338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:18,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:18,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:00:18,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799390028] [2022-11-25 17:00:18,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:18,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:18,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:18,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:18,244 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-11-25 17:00:18,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:18,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:18,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-11-25 17:00:18,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:18,458 INFO L130 PetriNetUnfolder]: 561/986 cut-off events. [2022-11-25 17:00:18,458 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-25 17:00:18,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2627 conditions, 986 events. 561/986 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4921 event pairs, 288 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 2615. Up to 675 conditions per place. [2022-11-25 17:00:18,465 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 33 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-11-25 17:00:18,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 193 flow [2022-11-25 17:00:18,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2022-11-25 17:00:18,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45987654320987653 [2022-11-25 17:00:18,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2022-11-25 17:00:18,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2022-11-25 17:00:18,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:18,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2022-11-25 17:00:18,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:18,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:18,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:18,472 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 84 flow. Second operand 3 states and 447 transitions. [2022-11-25 17:00:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 193 flow [2022-11-25 17:00:18,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:18,475 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 99 flow [2022-11-25 17:00:18,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2022-11-25 17:00:18,476 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-11-25 17:00:18,476 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 99 flow [2022-11-25 17:00:18,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:18,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:18,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:18,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:00:18,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash -18957518, now seen corresponding path program 1 times [2022-11-25 17:00:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:18,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564008205] [2022-11-25 17:00:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:18,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:18,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:18,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564008205] [2022-11-25 17:00:18,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564008205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:18,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640231569] [2022-11-25 17:00:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:18,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:18,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:18,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:18,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:00:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:18,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:00:18,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:18,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:18,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640231569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:18,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:18,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2022-11-25 17:00:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580447739] [2022-11-25 17:00:18,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:18,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:00:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:00:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:00:18,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-11-25 17:00:18,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:18,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:18,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-11-25 17:00:18,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:19,074 INFO L130 PetriNetUnfolder]: 493/870 cut-off events. [2022-11-25 17:00:19,075 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-11-25 17:00:19,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2548 conditions, 870 events. 493/870 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4396 event pairs, 16 based on Foata normal form. 0/630 useless extension candidates. Maximal degree in co-relation 2535. Up to 497 conditions per place. [2022-11-25 17:00:19,081 INFO L137 encePairwiseOnDemand]: 321/324 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-11-25 17:00:19,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 238 flow [2022-11-25 17:00:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:00:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:00:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2022-11-25 17:00:19,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45601851851851855 [2022-11-25 17:00:19,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2022-11-25 17:00:19,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2022-11-25 17:00:19,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:19,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2022-11-25 17:00:19,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:19,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:19,090 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:19,090 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 99 flow. Second operand 4 states and 591 transitions. [2022-11-25 17:00:19,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 238 flow [2022-11-25 17:00:19,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 42 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:19,092 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 95 flow [2022-11-25 17:00:19,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=31, 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=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2022-11-25 17:00:19,093 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2022-11-25 17:00:19,094 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 95 flow [2022-11-25 17:00:19,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:19,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:19,094 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:19,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:19,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:19,301 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:19,302 INFO L85 PathProgramCache]: Analyzing trace with hash -18957502, now seen corresponding path program 1 times [2022-11-25 17:00:19,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:19,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828106372] [2022-11-25 17:00:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:19,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:19,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828106372] [2022-11-25 17:00:19,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828106372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:19,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21653309] [2022-11-25 17:00:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:19,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:19,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:19,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:19,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:00:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:00:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:19,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:19,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21653309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:19,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:19,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2022-11-25 17:00:19,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220617878] [2022-11-25 17:00:19,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:19,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:00:19,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:00:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:00:19,829 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-11-25 17:00:19,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 95 flow. Second operand has 11 states, 11 states have (on average 129.72727272727272) internal successors, (1427), 11 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:19,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:19,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-11-25 17:00:19,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:20,315 INFO L130 PetriNetUnfolder]: 573/1022 cut-off events. [2022-11-25 17:00:20,315 INFO L131 PetriNetUnfolder]: For 269/269 co-relation queries the response was YES. [2022-11-25 17:00:20,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3000 conditions, 1022 events. 573/1022 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5206 event pairs, 178 based on Foata normal form. 40/786 useless extension candidates. Maximal degree in co-relation 2987. Up to 585 conditions per place. [2022-11-25 17:00:20,324 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 69 selfloop transitions, 17 changer transitions 5/91 dead transitions. [2022-11-25 17:00:20,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 91 transitions, 511 flow [2022-11-25 17:00:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:00:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:00:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1503 transitions. [2022-11-25 17:00:20,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2022-11-25 17:00:20,330 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1503 transitions. [2022-11-25 17:00:20,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1503 transitions. [2022-11-25 17:00:20,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:20,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1503 transitions. [2022-11-25 17:00:20,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 136.63636363636363) internal successors, (1503), 11 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,344 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,344 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 95 flow. Second operand 11 states and 1503 transitions. [2022-11-25 17:00:20,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 91 transitions, 511 flow [2022-11-25 17:00:20,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 91 transitions, 503 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:00:20,348 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 233 flow [2022-11-25 17:00:20,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=233, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2022-11-25 17:00:20,349 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2022-11-25 17:00:20,349 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 233 flow [2022-11-25 17:00:20,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 129.72727272727272) internal successors, (1427), 11 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:20,350 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:20,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:20,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 17:00:20,556 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash -883274555, now seen corresponding path program 1 times [2022-11-25 17:00:20,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:20,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143495248] [2022-11-25 17:00:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:20,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:20,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143495248] [2022-11-25 17:00:20,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143495248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:20,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:20,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:00:20,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209357861] [2022-11-25 17:00:20,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:20,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:20,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:00:20,707 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2022-11-25 17:00:20,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:20,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2022-11-25 17:00:20,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:20,873 INFO L130 PetriNetUnfolder]: 433/810 cut-off events. [2022-11-25 17:00:20,874 INFO L131 PetriNetUnfolder]: For 1165/1187 co-relation queries the response was YES. [2022-11-25 17:00:20,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3344 conditions, 810 events. 433/810 cut-off events. For 1165/1187 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3986 event pairs, 136 based on Foata normal form. 32/618 useless extension candidates. Maximal degree in co-relation 3324. Up to 769 conditions per place. [2022-11-25 17:00:20,881 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 26 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2022-11-25 17:00:20,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 33 transitions, 263 flow [2022-11-25 17:00:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2022-11-25 17:00:20,883 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44135802469135804 [2022-11-25 17:00:20,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2022-11-25 17:00:20,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2022-11-25 17:00:20,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:20,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2022-11-25 17:00:20,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,891 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 233 flow. Second operand 3 states and 429 transitions. [2022-11-25 17:00:20,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 33 transitions, 263 flow [2022-11-25 17:00:20,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 238 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-25 17:00:20,898 INFO L231 Difference]: Finished difference. Result has 46 places, 29 transitions, 191 flow [2022-11-25 17:00:20,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=46, PETRI_TRANSITIONS=29} [2022-11-25 17:00:20,900 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2022-11-25 17:00:20,900 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 29 transitions, 191 flow [2022-11-25 17:00:20,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:20,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:20,901 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-25 17:00:20,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:00:20,901 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:20,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1344015330, now seen corresponding path program 2 times [2022-11-25 17:00:20,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:20,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326855115] [2022-11-25 17:00:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:20,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:00:21,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326855115] [2022-11-25 17:00:21,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326855115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47651328] [2022-11-25 17:00:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:00:21,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:21,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:21,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:00:21,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:00:21,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:00:21,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:00:21,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:21,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47651328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:21,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:21,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-11-25 17:00:21,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264713720] [2022-11-25 17:00:21,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:21,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:00:21,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:21,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:00:21,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:00:21,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-11-25 17:00:21,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 29 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:21,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:21,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-11-25 17:00:21,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:21,355 INFO L130 PetriNetUnfolder]: 382/723 cut-off events. [2022-11-25 17:00:21,355 INFO L131 PetriNetUnfolder]: For 1316/1336 co-relation queries the response was YES. [2022-11-25 17:00:21,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3182 conditions, 723 events. 382/723 cut-off events. For 1316/1336 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3586 event pairs, 291 based on Foata normal form. 20/573 useless extension candidates. Maximal degree in co-relation 3161. Up to 719 conditions per place. [2022-11-25 17:00:21,362 INFO L137 encePairwiseOnDemand]: 322/324 looper letters, 24 selfloop transitions, 1 changer transitions 1/28 dead transitions. [2022-11-25 17:00:21,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 28 transitions, 233 flow [2022-11-25 17:00:21,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:00:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:00:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2022-11-25 17:00:21,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4434156378600823 [2022-11-25 17:00:21,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2022-11-25 17:00:21,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2022-11-25 17:00:21,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:21,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2022-11-25 17:00:21,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:21,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:21,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:21,371 INFO L175 Difference]: Start difference. First operand has 46 places, 29 transitions, 191 flow. Second operand 3 states and 431 transitions. [2022-11-25 17:00:21,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 28 transitions, 233 flow [2022-11-25 17:00:21,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 28 transitions, 202 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-11-25 17:00:21,382 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 146 flow [2022-11-25 17:00:21,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2022-11-25 17:00:21,383 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2022-11-25 17:00:21,383 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 146 flow [2022-11-25 17:00:21,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:21,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:21,384 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:21,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:21,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:21,590 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:21,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2121822937, now seen corresponding path program 1 times [2022-11-25 17:00:21,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:21,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338566869] [2022-11-25 17:00:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:22,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:22,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338566869] [2022-11-25 17:00:22,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338566869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739956834] [2022-11-25 17:00:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:22,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:22,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:22,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:22,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:00:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:00:22,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:22,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:00:22,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:22,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:00:22,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:22,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:00:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:22,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:23,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:23,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-25 17:00:23,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:23,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 145 [2022-11-25 17:00:23,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2022-11-25 17:00:23,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 94 [2022-11-25 17:00:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:23,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739956834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:23,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:23,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-25 17:00:23,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141038074] [2022-11-25 17:00:23,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:23,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:00:23,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:23,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:00:23,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=311, Unknown=5, NotChecked=0, Total=380 [2022-11-25 17:00:23,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:00:23,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 146 flow. Second operand has 20 states, 20 states have (on average 98.35) internal successors, (1967), 20 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:23,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:23,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:00:23,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:24,465 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_269 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_269) c_~q~0.base) .cse0) 2147483648)) (< (select (select |c_#memory_int| c_~q~0.base) .cse0) 2147483648))) is different from false [2022-11-25 17:00:25,673 INFO L130 PetriNetUnfolder]: 459/818 cut-off events. [2022-11-25 17:00:25,673 INFO L131 PetriNetUnfolder]: For 940/962 co-relation queries the response was YES. [2022-11-25 17:00:25,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2931 conditions, 818 events. 459/818 cut-off events. For 940/962 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3817 event pairs, 213 based on Foata normal form. 22/680 useless extension candidates. Maximal degree in co-relation 2910. Up to 602 conditions per place. [2022-11-25 17:00:25,682 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 61 selfloop transitions, 46 changer transitions 0/109 dead transitions. [2022-11-25 17:00:25,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 109 transitions, 733 flow [2022-11-25 17:00:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:00:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:00:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1754 transitions. [2022-11-25 17:00:25,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31844589687726943 [2022-11-25 17:00:25,690 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1754 transitions. [2022-11-25 17:00:25,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1754 transitions. [2022-11-25 17:00:25,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:25,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1754 transitions. [2022-11-25 17:00:25,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.17647058823529) internal successors, (1754), 17 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:25,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:25,707 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:25,708 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 146 flow. Second operand 17 states and 1754 transitions. [2022-11-25 17:00:25,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 109 transitions, 733 flow [2022-11-25 17:00:25,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 109 transitions, 732 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:00:25,714 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 543 flow [2022-11-25 17:00:25,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=543, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2022-11-25 17:00:25,715 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2022-11-25 17:00:25,715 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 543 flow [2022-11-25 17:00:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.35) internal successors, (1967), 20 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:25,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:25,717 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:25,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:25,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:00:25,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1614898161, now seen corresponding path program 1 times [2022-11-25 17:00:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:25,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674850036] [2022-11-25 17:00:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:26,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674850036] [2022-11-25 17:00:26,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674850036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580198788] [2022-11-25 17:00:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:26,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:26,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:26,487 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:26,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:00:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:00:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:26,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:00:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:26,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:00:26,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:26,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:00:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:26,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:27,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:27,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-25 17:00:27,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:27,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 85 [2022-11-25 17:00:27,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-11-25 17:00:27,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-25 17:00:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:27,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580198788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:27,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:27,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-11-25 17:00:27,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436158090] [2022-11-25 17:00:27,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:27,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:00:27,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:00:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:00:28,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2022-11-25 17:00:28,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 543 flow. Second operand has 19 states, 19 states have (on average 115.42105263157895) internal successors, (2193), 19 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:28,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:28,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2022-11-25 17:00:28,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:30,313 INFO L130 PetriNetUnfolder]: 598/1046 cut-off events. [2022-11-25 17:00:30,314 INFO L131 PetriNetUnfolder]: For 2703/2731 co-relation queries the response was YES. [2022-11-25 17:00:30,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5059 conditions, 1046 events. 598/1046 cut-off events. For 2703/2731 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5233 event pairs, 165 based on Foata normal form. 32/866 useless extension candidates. Maximal degree in co-relation 5033. Up to 641 conditions per place. [2022-11-25 17:00:30,325 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 82 selfloop transitions, 52 changer transitions 5/141 dead transitions. [2022-11-25 17:00:30,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 141 transitions, 1348 flow [2022-11-25 17:00:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:00:30,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:00:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1917 transitions. [2022-11-25 17:00:30,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3697916666666667 [2022-11-25 17:00:30,331 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1917 transitions. [2022-11-25 17:00:30,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1917 transitions. [2022-11-25 17:00:30,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:30,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1917 transitions. [2022-11-25 17:00:30,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 119.8125) internal successors, (1917), 16 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:30,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:30,371 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:30,371 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 543 flow. Second operand 16 states and 1917 transitions. [2022-11-25 17:00:30,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 141 transitions, 1348 flow [2022-11-25 17:00:30,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 141 transitions, 1177 flow, removed 82 selfloop flow, removed 3 redundant places. [2022-11-25 17:00:30,380 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 787 flow [2022-11-25 17:00:30,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=787, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2022-11-25 17:00:30,381 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2022-11-25 17:00:30,382 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 787 flow [2022-11-25 17:00:30,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 115.42105263157895) internal successors, (2193), 19 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:30,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:30,399 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:30,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:30,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:00:30,604 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2141744591, now seen corresponding path program 2 times [2022-11-25 17:00:30,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:30,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497311129] [2022-11-25 17:00:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:30,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:31,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:31,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497311129] [2022-11-25 17:00:31,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497311129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464036821] [2022-11-25 17:00:31,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:00:31,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:31,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:31,122 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:31,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:00:31,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:00:31,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:00:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:31,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:31,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:00:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:31,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:31,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464036821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:31,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:31,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-11-25 17:00:31,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034880515] [2022-11-25 17:00:31,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:31,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:00:31,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:31,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:00:31,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:00:31,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 324 [2022-11-25 17:00:31,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 92 transitions, 787 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:31,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:31,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 324 [2022-11-25 17:00:31,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:31,922 INFO L130 PetriNetUnfolder]: 547/991 cut-off events. [2022-11-25 17:00:31,922 INFO L131 PetriNetUnfolder]: For 4028/4053 co-relation queries the response was YES. [2022-11-25 17:00:31,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5471 conditions, 991 events. 547/991 cut-off events. For 4028/4053 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4976 event pairs, 115 based on Foata normal form. 41/878 useless extension candidates. Maximal degree in co-relation 5447. Up to 851 conditions per place. [2022-11-25 17:00:31,946 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 87 selfloop transitions, 18 changer transitions 6/113 dead transitions. [2022-11-25 17:00:31,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 1166 flow [2022-11-25 17:00:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:00:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:00:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 651 transitions. [2022-11-25 17:00:31,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40185185185185185 [2022-11-25 17:00:31,949 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 651 transitions. [2022-11-25 17:00:31,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 651 transitions. [2022-11-25 17:00:31,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:31,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 651 transitions. [2022-11-25 17:00:31,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:31,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:31,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:31,956 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 787 flow. Second operand 5 states and 651 transitions. [2022-11-25 17:00:31,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 1166 flow [2022-11-25 17:00:31,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 113 transitions, 1114 flow, removed 20 selfloop flow, removed 4 redundant places. [2022-11-25 17:00:31,975 INFO L231 Difference]: Finished difference. Result has 82 places, 95 transitions, 857 flow [2022-11-25 17:00:31,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=857, PETRI_PLACES=82, PETRI_TRANSITIONS=95} [2022-11-25 17:00:31,977 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2022-11-25 17:00:31,977 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 95 transitions, 857 flow [2022-11-25 17:00:31,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:31,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:31,978 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:31,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:32,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:00:32,185 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:32,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1611865253, now seen corresponding path program 2 times [2022-11-25 17:00:32,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:32,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94214588] [2022-11-25 17:00:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:32,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:32,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:32,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94214588] [2022-11-25 17:00:32,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94214588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:32,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647072434] [2022-11-25 17:00:32,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:00:32,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:32,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:32,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:00:32,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:00:32,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:00:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:32,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:32,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647072434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:32,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:32,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2022-11-25 17:00:32,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593422939] [2022-11-25 17:00:32,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:32,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:00:32,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:00:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:00:32,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-11-25 17:00:32,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 95 transitions, 857 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:32,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:32,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-11-25 17:00:32,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:33,278 INFO L130 PetriNetUnfolder]: 626/1118 cut-off events. [2022-11-25 17:00:33,278 INFO L131 PetriNetUnfolder]: For 6158/6183 co-relation queries the response was YES. [2022-11-25 17:00:33,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6665 conditions, 1118 events. 626/1118 cut-off events. For 6158/6183 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5687 event pairs, 108 based on Foata normal form. 61/1069 useless extension candidates. Maximal degree in co-relation 6638. Up to 861 conditions per place. [2022-11-25 17:00:33,300 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 91 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2022-11-25 17:00:33,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 1249 flow [2022-11-25 17:00:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:00:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:00:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 544 transitions. [2022-11-25 17:00:33,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2022-11-25 17:00:33,304 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 544 transitions. [2022-11-25 17:00:33,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 544 transitions. [2022-11-25 17:00:33,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:33,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 544 transitions. [2022-11-25 17:00:33,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,311 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,312 INFO L175 Difference]: Start difference. First operand has 82 places, 95 transitions, 857 flow. Second operand 4 states and 544 transitions. [2022-11-25 17:00:33,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 1249 flow [2022-11-25 17:00:33,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 1187 flow, removed 24 selfloop flow, removed 3 redundant places. [2022-11-25 17:00:33,336 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 900 flow [2022-11-25 17:00:33,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=900, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2022-11-25 17:00:33,337 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2022-11-25 17:00:33,338 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 900 flow [2022-11-25 17:00:33,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:33,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:33,339 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:33,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:33,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:00:33,545 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1611866361, now seen corresponding path program 3 times [2022-11-25 17:00:33,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:33,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313759746] [2022-11-25 17:00:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:33,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:34,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:34,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313759746] [2022-11-25 17:00:34,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313759746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:34,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471365400] [2022-11-25 17:00:34,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:00:34,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:34,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:34,218 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:34,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:00:34,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:00:34,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:00:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:34,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:34,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471365400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:34,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:34,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-11-25 17:00:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170046050] [2022-11-25 17:00:34,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:34,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:00:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:00:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:00:34,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-11-25 17:00:34,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 900 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:34,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:34,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-11-25 17:00:34,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:34,785 INFO L130 PetriNetUnfolder]: 626/1120 cut-off events. [2022-11-25 17:00:34,786 INFO L131 PetriNetUnfolder]: For 6719/6744 co-relation queries the response was YES. [2022-11-25 17:00:34,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6902 conditions, 1120 events. 626/1120 cut-off events. For 6719/6744 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5708 event pairs, 182 based on Foata normal form. 25/1051 useless extension candidates. Maximal degree in co-relation 6874. Up to 1007 conditions per place. [2022-11-25 17:00:34,800 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 88 selfloop transitions, 14 changer transitions 0/104 dead transitions. [2022-11-25 17:00:34,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 104 transitions, 1145 flow [2022-11-25 17:00:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:00:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:00:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 541 transitions. [2022-11-25 17:00:34,803 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4174382716049383 [2022-11-25 17:00:34,803 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 541 transitions. [2022-11-25 17:00:34,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 541 transitions. [2022-11-25 17:00:34,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:34,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 541 transitions. [2022-11-25 17:00:34,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:34,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:34,808 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:34,808 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 900 flow. Second operand 4 states and 541 transitions. [2022-11-25 17:00:34,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 104 transitions, 1145 flow [2022-11-25 17:00:34,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 1112 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 17:00:34,828 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 900 flow [2022-11-25 17:00:34,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=900, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2022-11-25 17:00:34,828 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2022-11-25 17:00:34,829 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 900 flow [2022-11-25 17:00:34,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:34,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:34,829 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:34,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:35,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:35,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1571785365, now seen corresponding path program 1 times [2022-11-25 17:00:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:35,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546036293] [2022-11-25 17:00:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:35,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:00:35,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:35,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546036293] [2022-11-25 17:00:35,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546036293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:35,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:00:35,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:00:35,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066543720] [2022-11-25 17:00:35,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:35,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:00:35,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:00:35,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:00:35,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2022-11-25 17:00:35,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 900 flow. Second operand has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:35,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:35,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2022-11-25 17:00:35,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:35,512 INFO L130 PetriNetUnfolder]: 727/1397 cut-off events. [2022-11-25 17:00:35,512 INFO L131 PetriNetUnfolder]: For 8434/8459 co-relation queries the response was YES. [2022-11-25 17:00:35,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8563 conditions, 1397 events. 727/1397 cut-off events. For 8434/8459 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7976 event pairs, 119 based on Foata normal form. 99/1378 useless extension candidates. Maximal degree in co-relation 8534. Up to 813 conditions per place. [2022-11-25 17:00:35,531 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 81 selfloop transitions, 35 changer transitions 6/124 dead transitions. [2022-11-25 17:00:35,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 124 transitions, 1441 flow [2022-11-25 17:00:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:00:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:00:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 581 transitions. [2022-11-25 17:00:35,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44830246913580246 [2022-11-25 17:00:35,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 581 transitions. [2022-11-25 17:00:35,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 581 transitions. [2022-11-25 17:00:35,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:35,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 581 transitions. [2022-11-25 17:00:35,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:35,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:35,539 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:35,539 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 900 flow. Second operand 4 states and 581 transitions. [2022-11-25 17:00:35,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 124 transitions, 1441 flow [2022-11-25 17:00:35,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 1418 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 17:00:35,561 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 1206 flow [2022-11-25 17:00:35,562 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1206, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2022-11-25 17:00:35,562 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2022-11-25 17:00:35,563 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 1206 flow [2022-11-25 17:00:35,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:35,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:35,563 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:00:35,564 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2146160285, now seen corresponding path program 1 times [2022-11-25 17:00:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:35,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178255269] [2022-11-25 17:00:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:35,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:35,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178255269] [2022-11-25 17:00:35,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178255269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:35,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487741622] [2022-11-25 17:00:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:35,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:35,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:35,935 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:35,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:00:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:36,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:00:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:36,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:00:36,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:36,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:00:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:36,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:00:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:36,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:36,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:36,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-25 17:00:36,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:36,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 75 [2022-11-25 17:00:36,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-11-25 17:00:36,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-11-25 17:00:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:36,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487741622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:36,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:36,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-11-25 17:00:36,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066303493] [2022-11-25 17:00:36,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:36,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:00:36,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:36,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:00:36,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:00:38,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2022-11-25 17:00:38,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 1206 flow. Second operand has 19 states, 19 states have (on average 115.42105263157895) internal successors, (2193), 19 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:38,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:38,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2022-11-25 17:00:38,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:40,442 INFO L130 PetriNetUnfolder]: 749/1451 cut-off events. [2022-11-25 17:00:40,442 INFO L131 PetriNetUnfolder]: For 11837/11862 co-relation queries the response was YES. [2022-11-25 17:00:40,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9969 conditions, 1451 events. 749/1451 cut-off events. For 11837/11862 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8542 event pairs, 238 based on Foata normal form. 44/1379 useless extension candidates. Maximal degree in co-relation 9938. Up to 1046 conditions per place. [2022-11-25 17:00:40,464 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 101 selfloop transitions, 61 changer transitions 11/175 dead transitions. [2022-11-25 17:00:40,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 175 transitions, 2200 flow [2022-11-25 17:00:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:00:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:00:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2016 transitions. [2022-11-25 17:00:40,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3660130718954248 [2022-11-25 17:00:40,474 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2016 transitions. [2022-11-25 17:00:40,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2016 transitions. [2022-11-25 17:00:40,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:40,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2016 transitions. [2022-11-25 17:00:40,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 118.58823529411765) internal successors, (2016), 17 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:40,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:40,494 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:40,494 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 1206 flow. Second operand 17 states and 2016 transitions. [2022-11-25 17:00:40,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 175 transitions, 2200 flow [2022-11-25 17:00:40,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 175 transitions, 2098 flow, removed 48 selfloop flow, removed 2 redundant places. [2022-11-25 17:00:40,543 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 1526 flow [2022-11-25 17:00:40,544 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1526, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2022-11-25 17:00:40,544 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2022-11-25 17:00:40,545 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 1526 flow [2022-11-25 17:00:40,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 115.42105263157895) internal successors, (2193), 19 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:40,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:40,546 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:40,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:40,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:00:40,753 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:40,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:40,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1611865307, now seen corresponding path program 1 times [2022-11-25 17:00:40,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:40,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937451681] [2022-11-25 17:00:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:40,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:41,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937451681] [2022-11-25 17:00:41,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937451681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745346735] [2022-11-25 17:00:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:41,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:41,267 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:41,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:00:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:00:41,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:41,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:00:41,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:41,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:00:41,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:41,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:00:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:41,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:41,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:41,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-25 17:00:41,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:41,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 85 [2022-11-25 17:00:42,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-11-25 17:00:42,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-25 17:00:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:42,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745346735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:42,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:42,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-11-25 17:00:42,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603759924] [2022-11-25 17:00:42,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:42,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:00:42,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:00:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=283, Unknown=2, NotChecked=0, Total=342 [2022-11-25 17:00:42,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:00:42,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 1526 flow. Second operand has 19 states, 19 states have (on average 98.42105263157895) internal successors, (1870), 19 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:42,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:42,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:00:42,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:43,903 INFO L130 PetriNetUnfolder]: 726/1426 cut-off events. [2022-11-25 17:00:43,904 INFO L131 PetriNetUnfolder]: For 12121/12146 co-relation queries the response was YES. [2022-11-25 17:00:43,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9980 conditions, 1426 events. 726/1426 cut-off events. For 12121/12146 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8535 event pairs, 240 based on Foata normal form. 37/1367 useless extension candidates. Maximal degree in co-relation 9946. Up to 1041 conditions per place. [2022-11-25 17:00:43,924 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 98 selfloop transitions, 56 changer transitions 10/165 dead transitions. [2022-11-25 17:00:43,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 165 transitions, 2250 flow [2022-11-25 17:00:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:00:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:00:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1423 transitions. [2022-11-25 17:00:43,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31371252204585537 [2022-11-25 17:00:43,929 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1423 transitions. [2022-11-25 17:00:43,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1423 transitions. [2022-11-25 17:00:43,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:43,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1423 transitions. [2022-11-25 17:00:43,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 101.64285714285714) internal successors, (1423), 14 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:43,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:43,996 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:43,996 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 1526 flow. Second operand 14 states and 1423 transitions. [2022-11-25 17:00:43,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 165 transitions, 2250 flow [2022-11-25 17:00:44,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 165 transitions, 2160 flow, removed 26 selfloop flow, removed 6 redundant places. [2022-11-25 17:00:44,037 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 1524 flow [2022-11-25 17:00:44,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1524, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2022-11-25 17:00:44,038 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2022-11-25 17:00:44,038 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 1524 flow [2022-11-25 17:00:44,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 98.42105263157895) internal successors, (1870), 19 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:44,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:44,039 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:44,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:44,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:44,251 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1214212493, now seen corresponding path program 2 times [2022-11-25 17:00:44,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:44,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609141888] [2022-11-25 17:00:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:44,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:45,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:45,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609141888] [2022-11-25 17:00:45,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609141888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:45,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13812847] [2022-11-25 17:00:45,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:00:45,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:45,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:45,383 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:45,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:00:45,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:00:45,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:00:45,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:00:45,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:45,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13812847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:45,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:45,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2022-11-25 17:00:45,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626797870] [2022-11-25 17:00:45,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:45,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:00:45,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:00:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:00:45,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-11-25 17:00:45,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 1524 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:45,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:45,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-11-25 17:00:45,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:46,157 INFO L130 PetriNetUnfolder]: 713/1399 cut-off events. [2022-11-25 17:00:46,157 INFO L131 PetriNetUnfolder]: For 12746/12767 co-relation queries the response was YES. [2022-11-25 17:00:46,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9910 conditions, 1399 events. 713/1399 cut-off events. For 12746/12767 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 8395 event pairs, 185 based on Foata normal form. 28/1339 useless extension candidates. Maximal degree in co-relation 9875. Up to 1313 conditions per place. [2022-11-25 17:00:46,177 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 108 selfloop transitions, 8 changer transitions 7/124 dead transitions. [2022-11-25 17:00:46,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1814 flow [2022-11-25 17:00:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:00:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:00:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2022-11-25 17:00:46,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2022-11-25 17:00:46,180 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2022-11-25 17:00:46,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2022-11-25 17:00:46,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:46,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2022-11-25 17:00:46,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:46,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:46,185 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:46,186 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 1524 flow. Second operand 5 states and 672 transitions. [2022-11-25 17:00:46,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1814 flow [2022-11-25 17:00:46,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 1665 flow, removed 19 selfloop flow, removed 11 redundant places. [2022-11-25 17:00:46,238 INFO L231 Difference]: Finished difference. Result has 86 places, 110 transitions, 1335 flow [2022-11-25 17:00:46,239 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1335, PETRI_PLACES=86, PETRI_TRANSITIONS=110} [2022-11-25 17:00:46,239 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2022-11-25 17:00:46,239 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 110 transitions, 1335 flow [2022-11-25 17:00:46,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:46,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:46,240 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:46,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:46,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:46,446 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2013701489, now seen corresponding path program 2 times [2022-11-25 17:00:46,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:46,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457571089] [2022-11-25 17:00:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:46,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:47,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:47,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457571089] [2022-11-25 17:00:47,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457571089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:47,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337386161] [2022-11-25 17:00:47,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:00:47,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:47,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:47,727 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:47,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:00:47,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:00:47,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:47,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:00:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:47,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:00:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:00:48,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:48,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337386161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:48,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:48,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2022-11-25 17:00:48,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892350643] [2022-11-25 17:00:48,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:48,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:00:48,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:00:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:00:48,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 324 [2022-11-25 17:00:48,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 110 transitions, 1335 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:48,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:48,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 324 [2022-11-25 17:00:48,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:48,531 INFO L130 PetriNetUnfolder]: 748/1437 cut-off events. [2022-11-25 17:00:48,532 INFO L131 PetriNetUnfolder]: For 12154/12169 co-relation queries the response was YES. [2022-11-25 17:00:48,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10051 conditions, 1437 events. 748/1437 cut-off events. For 12154/12169 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8479 event pairs, 74 based on Foata normal form. 31/1384 useless extension candidates. Maximal degree in co-relation 10018. Up to 839 conditions per place. [2022-11-25 17:00:48,546 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 89 selfloop transitions, 44 changer transitions 0/134 dead transitions. [2022-11-25 17:00:48,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 134 transitions, 1845 flow [2022-11-25 17:00:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:00:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:00:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2022-11-25 17:00:48,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2022-11-25 17:00:48,548 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2022-11-25 17:00:48,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2022-11-25 17:00:48,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:48,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2022-11-25 17:00:48,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:48,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:48,553 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:48,553 INFO L175 Difference]: Start difference. First operand has 86 places, 110 transitions, 1335 flow. Second operand 5 states and 654 transitions. [2022-11-25 17:00:48,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 134 transitions, 1845 flow [2022-11-25 17:00:48,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 134 transitions, 1793 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-11-25 17:00:48,592 INFO L231 Difference]: Finished difference. Result has 85 places, 111 transitions, 1471 flow [2022-11-25 17:00:48,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1471, PETRI_PLACES=85, PETRI_TRANSITIONS=111} [2022-11-25 17:00:48,592 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 54 predicate places. [2022-11-25 17:00:48,593 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 111 transitions, 1471 flow [2022-11-25 17:00:48,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:48,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:48,593 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:48,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:48,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:48,798 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1982301829, now seen corresponding path program 3 times [2022-11-25 17:00:48,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:48,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90140673] [2022-11-25 17:00:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:48,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:49,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:49,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90140673] [2022-11-25 17:00:49,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90140673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:49,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747451865] [2022-11-25 17:00:49,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:00:49,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:49,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:49,754 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:49,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:00:49,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:00:49,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:00:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:49,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:49,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:00:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:00:50,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:50,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747451865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:50,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:50,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2022-11-25 17:00:50,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512576174] [2022-11-25 17:00:50,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:50,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:00:50,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:50,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:00:50,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:00:50,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 324 [2022-11-25 17:00:50,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 111 transitions, 1471 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:50,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:50,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 324 [2022-11-25 17:00:50,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:50,544 INFO L130 PetriNetUnfolder]: 740/1429 cut-off events. [2022-11-25 17:00:50,544 INFO L131 PetriNetUnfolder]: For 14091/14106 co-relation queries the response was YES. [2022-11-25 17:00:50,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10611 conditions, 1429 events. 740/1429 cut-off events. For 14091/14106 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8416 event pairs, 215 based on Foata normal form. 23/1368 useless extension candidates. Maximal degree in co-relation 10577. Up to 1347 conditions per place. [2022-11-25 17:00:50,559 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 105 selfloop transitions, 7 changer transitions 6/119 dead transitions. [2022-11-25 17:00:50,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 119 transitions, 1742 flow [2022-11-25 17:00:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:00:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:00:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 647 transitions. [2022-11-25 17:00:50,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3993827160493827 [2022-11-25 17:00:50,561 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 647 transitions. [2022-11-25 17:00:50,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 647 transitions. [2022-11-25 17:00:50,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:50,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 647 transitions. [2022-11-25 17:00:50,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.4) internal successors, (647), 5 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:50,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:50,565 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:50,566 INFO L175 Difference]: Start difference. First operand has 85 places, 111 transitions, 1471 flow. Second operand 5 states and 647 transitions. [2022-11-25 17:00:50,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 119 transitions, 1742 flow [2022-11-25 17:00:50,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 119 transitions, 1661 flow, removed 21 selfloop flow, removed 2 redundant places. [2022-11-25 17:00:50,611 INFO L231 Difference]: Finished difference. Result has 87 places, 108 transitions, 1378 flow [2022-11-25 17:00:50,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1378, PETRI_PLACES=87, PETRI_TRANSITIONS=108} [2022-11-25 17:00:50,612 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2022-11-25 17:00:50,612 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 108 transitions, 1378 flow [2022-11-25 17:00:50,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:50,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:50,613 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:50,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:50,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:50,819 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:50,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1844566373, now seen corresponding path program 1 times [2022-11-25 17:00:50,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:50,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239407187] [2022-11-25 17:00:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:50,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:51,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:51,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239407187] [2022-11-25 17:00:51,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239407187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843700855] [2022-11-25 17:00:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:51,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:51,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:51,477 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:51,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:00:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:51,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:00:51,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:51,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:00:51,763 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 17:00:51,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-25 17:00:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:51,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 17:00:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:00:52,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:00:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:52,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:00:52,359 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_630 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_630) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 2147483647)) is different from false [2022-11-25 17:00:52,688 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-11-25 17:00:52,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-11-25 17:00:52,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:00:52,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 85 [2022-11-25 17:00:52,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-11-25 17:00:52,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-11-25 17:00:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:52,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843700855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:00:52,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:00:52,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2022-11-25 17:00:52,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143741187] [2022-11-25 17:00:52,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:00:52,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:00:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:00:52,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=464, Unknown=2, NotChecked=44, Total=600 [2022-11-25 17:00:53,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:00:53,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 108 transitions, 1378 flow. Second operand has 25 states, 25 states have (on average 98.28) internal successors, (2457), 25 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:53,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:53,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:00:53,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:56,385 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~q_front~0 4) c_~q~0.offset))) (let ((.cse0 (forall ((v_ArrVal_630 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_630) c_~q~0.base) .cse1) 2147483647)))) (and (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) .cse0) (<= (select (select |c_#memory_int| c_~q~0.base) .cse1) 2147483647) (= c_~s~0 0) .cse0))) is different from false [2022-11-25 17:00:56,715 INFO L130 PetriNetUnfolder]: 922/1685 cut-off events. [2022-11-25 17:00:56,716 INFO L131 PetriNetUnfolder]: For 15474/15489 co-relation queries the response was YES. [2022-11-25 17:00:56,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12385 conditions, 1685 events. 922/1685 cut-off events. For 15474/15489 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 9719 event pairs, 238 based on Foata normal form. 42/1601 useless extension candidates. Maximal degree in co-relation 12351. Up to 999 conditions per place. [2022-11-25 17:00:56,741 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 120 selfloop transitions, 114 changer transitions 1/236 dead transitions. [2022-11-25 17:00:56,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 236 transitions, 3358 flow [2022-11-25 17:00:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:00:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:00:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2677 transitions. [2022-11-25 17:00:56,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31778252611585944 [2022-11-25 17:00:56,750 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2677 transitions. [2022-11-25 17:00:56,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2677 transitions. [2022-11-25 17:00:56,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:56,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2677 transitions. [2022-11-25 17:00:56,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 102.96153846153847) internal successors, (2677), 26 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:56,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:56,773 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:56,773 INFO L175 Difference]: Start difference. First operand has 87 places, 108 transitions, 1378 flow. Second operand 26 states and 2677 transitions. [2022-11-25 17:00:56,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 236 transitions, 3358 flow [2022-11-25 17:00:56,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 236 transitions, 3282 flow, removed 26 selfloop flow, removed 7 redundant places. [2022-11-25 17:00:56,824 INFO L231 Difference]: Finished difference. Result has 114 places, 178 transitions, 2842 flow [2022-11-25 17:00:56,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2842, PETRI_PLACES=114, PETRI_TRANSITIONS=178} [2022-11-25 17:00:56,825 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2022-11-25 17:00:56,825 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 178 transitions, 2842 flow [2022-11-25 17:00:56,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.28) internal successors, (2457), 25 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:56,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:56,826 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:56,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:57,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:57,033 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1771309123, now seen corresponding path program 4 times [2022-11-25 17:00:57,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:57,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134560571] [2022-11-25 17:00:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:00:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:00:57,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:00:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134560571] [2022-11-25 17:00:57,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134560571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:00:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767529018] [2022-11-25 17:00:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:00:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:57,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:00:57,815 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:00:57,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:00:57,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:00:57,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:00:57,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:00:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:00:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:00:58,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:00:58,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767529018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:00:58,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:00:58,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2022-11-25 17:00:58,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354663602] [2022-11-25 17:00:58,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:00:58,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:00:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:00:58,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:00:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:00:58,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-11-25 17:00:58,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 178 transitions, 2842 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:58,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:58,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-11-25 17:00:58,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:00:58,535 INFO L130 PetriNetUnfolder]: 916/1670 cut-off events. [2022-11-25 17:00:58,535 INFO L131 PetriNetUnfolder]: For 24973/24988 co-relation queries the response was YES. [2022-11-25 17:00:58,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14864 conditions, 1670 events. 916/1670 cut-off events. For 24973/24988 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 9527 event pairs, 219 based on Foata normal form. 23/1567 useless extension candidates. Maximal degree in co-relation 14820. Up to 1613 conditions per place. [2022-11-25 17:00:58,555 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 171 selfloop transitions, 6 changer transitions 5/183 dead transitions. [2022-11-25 17:00:58,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 183 transitions, 3255 flow [2022-11-25 17:00:58,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:00:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:00:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 538 transitions. [2022-11-25 17:00:58,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41512345679012347 [2022-11-25 17:00:58,558 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 538 transitions. [2022-11-25 17:00:58,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 538 transitions. [2022-11-25 17:00:58,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:00:58,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 538 transitions. [2022-11-25 17:00:58,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:58,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:58,562 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:58,562 INFO L175 Difference]: Start difference. First operand has 114 places, 178 transitions, 2842 flow. Second operand 4 states and 538 transitions. [2022-11-25 17:00:58,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 183 transitions, 3255 flow [2022-11-25 17:00:58,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 2564 flow, removed 341 selfloop flow, removed 4 redundant places. [2022-11-25 17:00:58,687 INFO L231 Difference]: Finished difference. Result has 113 places, 176 transitions, 2136 flow [2022-11-25 17:00:58,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2136, PETRI_PLACES=113, PETRI_TRANSITIONS=176} [2022-11-25 17:00:58,688 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 82 predicate places. [2022-11-25 17:00:58,689 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 176 transitions, 2136 flow [2022-11-25 17:00:58,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:58,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:00:58,689 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:00:58,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:00:58,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:00:58,901 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:00:58,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:00:58,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1771308123, now seen corresponding path program 3 times [2022-11-25 17:00:58,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:00:58,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582093121] [2022-11-25 17:00:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:00:58,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:00:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:00,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:00,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582093121] [2022-11-25 17:01:00,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582093121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:00,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778409202] [2022-11-25 17:01:00,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:01:00,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:00,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:00,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:00,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:01:00,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:01:00,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:00,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:01:00,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:01:00,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:01:00,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778409202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:01:00,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:01:00,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2022-11-25 17:01:00,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746354490] [2022-11-25 17:01:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:01:00,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:01:00,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:01:00,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:01:00,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-11-25 17:01:00,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 176 transitions, 2136 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:00,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:00,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-11-25 17:01:00,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:01,437 INFO L130 PetriNetUnfolder]: 819/1476 cut-off events. [2022-11-25 17:01:01,438 INFO L131 PetriNetUnfolder]: For 19426/19441 co-relation queries the response was YES. [2022-11-25 17:01:01,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11610 conditions, 1476 events. 819/1476 cut-off events. For 19426/19441 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8084 event pairs, 143 based on Foata normal form. 15/1395 useless extension candidates. Maximal degree in co-relation 11565. Up to 1197 conditions per place. [2022-11-25 17:01:01,459 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 172 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2022-11-25 17:01:01,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 195 transitions, 2779 flow [2022-11-25 17:01:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:01:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:01:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 541 transitions. [2022-11-25 17:01:01,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4174382716049383 [2022-11-25 17:01:01,462 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 541 transitions. [2022-11-25 17:01:01,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 541 transitions. [2022-11-25 17:01:01,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:01,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 541 transitions. [2022-11-25 17:01:01,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:01,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:01,465 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:01,466 INFO L175 Difference]: Start difference. First operand has 113 places, 176 transitions, 2136 flow. Second operand 4 states and 541 transitions. [2022-11-25 17:01:01,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 195 transitions, 2779 flow [2022-11-25 17:01:01,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 195 transitions, 2727 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-25 17:01:01,558 INFO L231 Difference]: Finished difference. Result has 108 places, 174 transitions, 2098 flow [2022-11-25 17:01:01,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2098, PETRI_PLACES=108, PETRI_TRANSITIONS=174} [2022-11-25 17:01:01,559 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2022-11-25 17:01:01,559 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 174 transitions, 2098 flow [2022-11-25 17:01:01,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:01,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:01,560 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:01,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:01,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:01,767 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:01:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2013701543, now seen corresponding path program 3 times [2022-11-25 17:01:01,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:01,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652187414] [2022-11-25 17:01:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:01,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:03,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:03,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652187414] [2022-11-25 17:01:03,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652187414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:03,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26269983] [2022-11-25 17:01:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:01:03,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:03,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:03,238 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:03,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:01:03,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:01:03,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:01:03,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:03,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:01:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:01:03,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:01:03,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26269983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:01:03,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:01:03,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2022-11-25 17:01:03,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034781928] [2022-11-25 17:01:03,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:01:03,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:01:03,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:01:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:01:03,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 324 [2022-11-25 17:01:03,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 174 transitions, 2098 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:03,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:03,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 324 [2022-11-25 17:01:03,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:04,075 INFO L130 PetriNetUnfolder]: 782/1427 cut-off events. [2022-11-25 17:01:04,075 INFO L131 PetriNetUnfolder]: For 17651/17666 co-relation queries the response was YES. [2022-11-25 17:01:04,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11116 conditions, 1427 events. 782/1427 cut-off events. For 17651/17666 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7916 event pairs, 55 based on Foata normal form. 48/1339 useless extension candidates. Maximal degree in co-relation 11074. Up to 761 conditions per place. [2022-11-25 17:01:04,087 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 149 selfloop transitions, 46 changer transitions 0/196 dead transitions. [2022-11-25 17:01:04,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 196 transitions, 2741 flow [2022-11-25 17:01:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:01:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:01:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 648 transitions. [2022-11-25 17:01:04,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-11-25 17:01:04,089 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 648 transitions. [2022-11-25 17:01:04,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 648 transitions. [2022-11-25 17:01:04,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:04,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 648 transitions. [2022-11-25 17:01:04,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:04,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:04,094 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:04,094 INFO L175 Difference]: Start difference. First operand has 108 places, 174 transitions, 2098 flow. Second operand 5 states and 648 transitions. [2022-11-25 17:01:04,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 196 transitions, 2741 flow [2022-11-25 17:01:04,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 196 transitions, 2697 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:01:04,167 INFO L231 Difference]: Finished difference. Result has 109 places, 169 transitions, 2081 flow [2022-11-25 17:01:04,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2081, PETRI_PLACES=109, PETRI_TRANSITIONS=169} [2022-11-25 17:01:04,167 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2022-11-25 17:01:04,168 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 169 transitions, 2081 flow [2022-11-25 17:01:04,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:04,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:04,169 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:04,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-25 17:01:04,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:04,375 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:01:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:04,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1406975455, now seen corresponding path program 1 times [2022-11-25 17:01:04,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:04,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475963428] [2022-11-25 17:01:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:04,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:05,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:05,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475963428] [2022-11-25 17:01:05,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475963428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:05,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069294726] [2022-11-25 17:01:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:05,107 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:05,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:01:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 17:01:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:05,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:01:05,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:01:05,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:01:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:05,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:06,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:06,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 84 [2022-11-25 17:01:06,312 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-11-25 17:01:06,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 538 treesize of output 505 [2022-11-25 17:01:06,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:01:06,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:01:06,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:06,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 377 treesize of output 353 [2022-11-25 17:01:06,409 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-11-25 17:01:06,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 418 treesize of output 342 [2022-11-25 17:01:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:07,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069294726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:07,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:07,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-11-25 17:01:07,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047610048] [2022-11-25 17:01:07,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:07,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:01:07,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:07,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:01:07,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=619, Unknown=3, NotChecked=0, Total=756 [2022-11-25 17:01:08,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:01:08,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 169 transitions, 2081 flow. Second operand has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:08,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:08,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:01:08,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:12,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:01:14,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:01:16,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:01:18,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:01:20,157 INFO L130 PetriNetUnfolder]: 1489/2620 cut-off events. [2022-11-25 17:01:20,157 INFO L131 PetriNetUnfolder]: For 30542/30567 co-relation queries the response was YES. [2022-11-25 17:01:20,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20012 conditions, 2620 events. 1489/2620 cut-off events. For 30542/30567 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 15949 event pairs, 144 based on Foata normal form. 25/2342 useless extension candidates. Maximal degree in co-relation 19970. Up to 1313 conditions per place. [2022-11-25 17:01:20,176 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 272 selfloop transitions, 256 changer transitions 2/531 dead transitions. [2022-11-25 17:01:20,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 531 transitions, 7466 flow [2022-11-25 17:01:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 17:01:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-25 17:01:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4016 transitions. [2022-11-25 17:01:20,183 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3178220955998734 [2022-11-25 17:01:20,183 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4016 transitions. [2022-11-25 17:01:20,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4016 transitions. [2022-11-25 17:01:20,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:20,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4016 transitions. [2022-11-25 17:01:20,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 102.97435897435898) internal successors, (4016), 39 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:20,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 324.0) internal successors, (12960), 40 states have internal predecessors, (12960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:20,204 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 324.0) internal successors, (12960), 40 states have internal predecessors, (12960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:20,204 INFO L175 Difference]: Start difference. First operand has 109 places, 169 transitions, 2081 flow. Second operand 39 states and 4016 transitions. [2022-11-25 17:01:20,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 531 transitions, 7466 flow [2022-11-25 17:01:20,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 531 transitions, 7276 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:01:20,290 INFO L231 Difference]: Finished difference. Result has 161 places, 395 transitions, 5853 flow [2022-11-25 17:01:20,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5853, PETRI_PLACES=161, PETRI_TRANSITIONS=395} [2022-11-25 17:01:20,291 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 130 predicate places. [2022-11-25 17:01:20,291 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 395 transitions, 5853 flow [2022-11-25 17:01:20,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:20,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:20,292 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:20,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:20,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:01:20,497 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:01:20,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:20,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1404351871, now seen corresponding path program 2 times [2022-11-25 17:01:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:20,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391602282] [2022-11-25 17:01:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:20,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:21,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:21,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391602282] [2022-11-25 17:01:21,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391602282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:21,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420336055] [2022-11-25 17:01:21,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:01:21,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:21,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:21,231 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:21,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:01:21,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:01:21,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:01:21,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:21,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:21,542 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:01:21,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-25 17:01:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:01:21,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420336055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:21,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:21,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 16 [2022-11-25 17:01:21,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862843458] [2022-11-25 17:01:21,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:21,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:01:21,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:01:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:01:22,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 324 [2022-11-25 17:01:22,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 395 transitions, 5853 flow. Second operand has 18 states, 18 states have (on average 117.55555555555556) internal successors, (2116), 18 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:22,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:22,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 324 [2022-11-25 17:01:22,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:24,787 INFO L130 PetriNetUnfolder]: 1769/3148 cut-off events. [2022-11-25 17:01:24,788 INFO L131 PetriNetUnfolder]: For 48154/48174 co-relation queries the response was YES. [2022-11-25 17:01:24,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27264 conditions, 3148 events. 1769/3148 cut-off events. For 48154/48174 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 20148 event pairs, 158 based on Foata normal form. 146/3017 useless extension candidates. Maximal degree in co-relation 27204. Up to 1549 conditions per place. [2022-11-25 17:01:24,816 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 320 selfloop transitions, 239 changer transitions 0/560 dead transitions. [2022-11-25 17:01:24,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 560 transitions, 9205 flow [2022-11-25 17:01:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:01:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 17:01:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2813 transitions. [2022-11-25 17:01:24,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3774825550187869 [2022-11-25 17:01:24,821 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2813 transitions. [2022-11-25 17:01:24,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2813 transitions. [2022-11-25 17:01:24,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:24,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2813 transitions. [2022-11-25 17:01:24,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 122.30434782608695) internal successors, (2813), 23 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:24,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:24,834 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:24,835 INFO L175 Difference]: Start difference. First operand has 161 places, 395 transitions, 5853 flow. Second operand 23 states and 2813 transitions. [2022-11-25 17:01:24,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 560 transitions, 9205 flow [2022-11-25 17:01:25,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 560 transitions, 8473 flow, removed 354 selfloop flow, removed 9 redundant places. [2022-11-25 17:01:25,113 INFO L231 Difference]: Finished difference. Result has 179 places, 445 transitions, 6614 flow [2022-11-25 17:01:25,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4938, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6614, PETRI_PLACES=179, PETRI_TRANSITIONS=445} [2022-11-25 17:01:25,115 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 148 predicate places. [2022-11-25 17:01:25,115 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 445 transitions, 6614 flow [2022-11-25 17:01:25,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 117.55555555555556) internal successors, (2116), 18 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:25,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:25,116 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:25,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:25,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:01:25,321 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:01:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1346983425, now seen corresponding path program 1 times [2022-11-25 17:01:25,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:25,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392051618] [2022-11-25 17:01:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:25,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392051618] [2022-11-25 17:01:25,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392051618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215843293] [2022-11-25 17:01:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:25,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:25,799 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:25,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:01:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 17:01:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:26,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:26,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:01:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:26,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:26,246 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_852 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_852) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1)) is different from false [2022-11-25 17:01:26,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:26,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-11-25 17:01:26,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-25 17:01:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:01:26,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215843293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:26,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:26,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2022-11-25 17:01:26,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107133396] [2022-11-25 17:01:26,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:26,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:01:26,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:01:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2022-11-25 17:01:26,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-11-25 17:01:26,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 445 transitions, 6614 flow. Second operand has 23 states, 23 states have (on average 101.52173913043478) internal successors, (2335), 23 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:26,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:26,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-11-25 17:01:26,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:27,985 INFO L130 PetriNetUnfolder]: 1586/2929 cut-off events. [2022-11-25 17:01:27,985 INFO L131 PetriNetUnfolder]: For 51501/51521 co-relation queries the response was YES. [2022-11-25 17:01:27,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25886 conditions, 2929 events. 1586/2929 cut-off events. For 51501/51521 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 19329 event pairs, 100 based on Foata normal form. 132/2894 useless extension candidates. Maximal degree in co-relation 25825. Up to 1560 conditions per place. [2022-11-25 17:01:28,012 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 304 selfloop transitions, 159 changer transitions 36/500 dead transitions. [2022-11-25 17:01:28,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 500 transitions, 8297 flow [2022-11-25 17:01:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:01:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:01:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1695 transitions. [2022-11-25 17:01:28,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3269675925925926 [2022-11-25 17:01:28,017 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1695 transitions. [2022-11-25 17:01:28,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1695 transitions. [2022-11-25 17:01:28,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:28,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1695 transitions. [2022-11-25 17:01:28,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 105.9375) internal successors, (1695), 16 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:28,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:28,028 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:28,028 INFO L175 Difference]: Start difference. First operand has 179 places, 445 transitions, 6614 flow. Second operand 16 states and 1695 transitions. [2022-11-25 17:01:28,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 500 transitions, 8297 flow [2022-11-25 17:01:28,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 500 transitions, 7734 flow, removed 152 selfloop flow, removed 17 redundant places. [2022-11-25 17:01:28,270 INFO L231 Difference]: Finished difference. Result has 180 places, 414 transitions, 5998 flow [2022-11-25 17:01:28,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=5790, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5998, PETRI_PLACES=180, PETRI_TRANSITIONS=414} [2022-11-25 17:01:28,271 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2022-11-25 17:01:28,271 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 414 transitions, 5998 flow [2022-11-25 17:01:28,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 101.52173913043478) internal successors, (2335), 23 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:28,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:28,272 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:28,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:28,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:01:28,474 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:01:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1974592737, now seen corresponding path program 2 times [2022-11-25 17:01:28,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:28,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131667880] [2022-11-25 17:01:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:28,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:29,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131667880] [2022-11-25 17:01:29,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131667880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:29,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134342971] [2022-11-25 17:01:29,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:01:29,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:29,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:29,239 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:29,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:01:29,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:01:29,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:29,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:01:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:29,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:29,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 17:01:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:29,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:29,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:29,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 93 [2022-11-25 17:01:29,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:29,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 5 [2022-11-25 17:01:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:01:30,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134342971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:30,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:30,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2022-11-25 17:01:30,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035140976] [2022-11-25 17:01:30,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:30,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:01:30,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:01:30,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=565, Unknown=2, NotChecked=0, Total=650 [2022-11-25 17:01:30,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-11-25 17:01:30,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 414 transitions, 5998 flow. Second operand has 26 states, 26 states have (on average 101.34615384615384) internal successors, (2635), 26 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:30,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:30,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-11-25 17:01:30,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:32,971 INFO L130 PetriNetUnfolder]: 1394/2577 cut-off events. [2022-11-25 17:01:32,972 INFO L131 PetriNetUnfolder]: For 45229/45229 co-relation queries the response was YES. [2022-11-25 17:01:32,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22837 conditions, 2577 events. 1394/2577 cut-off events. For 45229/45229 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16517 event pairs, 59 based on Foata normal form. 134/2570 useless extension candidates. Maximal degree in co-relation 22776. Up to 1281 conditions per place. [2022-11-25 17:01:32,993 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 266 selfloop transitions, 244 changer transitions 9/520 dead transitions. [2022-11-25 17:01:32,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 520 transitions, 8484 flow [2022-11-25 17:01:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:01:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:01:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2734 transitions. [2022-11-25 17:01:33,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3245489078822412 [2022-11-25 17:01:33,000 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2734 transitions. [2022-11-25 17:01:33,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2734 transitions. [2022-11-25 17:01:33,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:33,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2734 transitions. [2022-11-25 17:01:33,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 105.15384615384616) internal successors, (2734), 26 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:33,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:33,014 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:33,014 INFO L175 Difference]: Start difference. First operand has 180 places, 414 transitions, 5998 flow. Second operand 26 states and 2734 transitions. [2022-11-25 17:01:33,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 520 transitions, 8484 flow [2022-11-25 17:01:33,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 520 transitions, 8163 flow, removed 113 selfloop flow, removed 9 redundant places. [2022-11-25 17:01:33,221 INFO L231 Difference]: Finished difference. Result has 196 places, 436 transitions, 6718 flow [2022-11-25 17:01:33,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6718, PETRI_PLACES=196, PETRI_TRANSITIONS=436} [2022-11-25 17:01:33,222 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 165 predicate places. [2022-11-25 17:01:33,223 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 436 transitions, 6718 flow [2022-11-25 17:01:33,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 101.34615384615384) internal successors, (2635), 26 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:33,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:33,224 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:33,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:33,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:33,426 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:01:33,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:33,426 INFO L85 PathProgramCache]: Analyzing trace with hash -956239221, now seen corresponding path program 3 times [2022-11-25 17:01:33,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:33,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82429944] [2022-11-25 17:01:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:34,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:34,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82429944] [2022-11-25 17:01:34,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82429944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:34,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30459502] [2022-11-25 17:01:34,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:01:34,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:34,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:34,195 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:34,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:01:34,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:01:34,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:34,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:01:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:34,704 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-11-25 17:01:34,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 49 [2022-11-25 17:01:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:01:34,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30459502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:34,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:34,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2022-11-25 17:01:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612017300] [2022-11-25 17:01:34,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:34,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:01:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:01:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:01:36,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-11-25 17:01:36,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 436 transitions, 6718 flow. Second operand has 20 states, 20 states have (on average 122.5) internal successors, (2450), 20 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:36,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:36,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-11-25 17:01:36,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:38,591 INFO L130 PetriNetUnfolder]: 1450/2750 cut-off events. [2022-11-25 17:01:38,591 INFO L131 PetriNetUnfolder]: For 56291/56291 co-relation queries the response was YES. [2022-11-25 17:01:38,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26707 conditions, 2750 events. 1450/2750 cut-off events. For 56291/56291 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 18159 event pairs, 192 based on Foata normal form. 111/2710 useless extension candidates. Maximal degree in co-relation 26641. Up to 1753 conditions per place. [2022-11-25 17:01:38,616 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 306 selfloop transitions, 255 changer transitions 5/567 dead transitions. [2022-11-25 17:01:38,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 567 transitions, 10224 flow [2022-11-25 17:01:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:01:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 17:01:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4547 transitions. [2022-11-25 17:01:38,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38983196159122085 [2022-11-25 17:01:38,623 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4547 transitions. [2022-11-25 17:01:38,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4547 transitions. [2022-11-25 17:01:38,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:38,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4547 transitions. [2022-11-25 17:01:38,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 126.30555555555556) internal successors, (4547), 36 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:38,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 324.0) internal successors, (11988), 37 states have internal predecessors, (11988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:38,644 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 324.0) internal successors, (11988), 37 states have internal predecessors, (11988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:38,644 INFO L175 Difference]: Start difference. First operand has 196 places, 436 transitions, 6718 flow. Second operand 36 states and 4547 transitions. [2022-11-25 17:01:38,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 567 transitions, 10224 flow [2022-11-25 17:01:38,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 567 transitions, 9456 flow, removed 232 selfloop flow, removed 22 redundant places. [2022-11-25 17:01:38,942 INFO L231 Difference]: Finished difference. Result has 221 places, 474 transitions, 8033 flow [2022-11-25 17:01:38,943 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8033, PETRI_PLACES=221, PETRI_TRANSITIONS=474} [2022-11-25 17:01:38,943 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 190 predicate places. [2022-11-25 17:01:38,943 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 474 transitions, 8033 flow [2022-11-25 17:01:38,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 122.5) internal successors, (2450), 20 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:38,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:38,944 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:38,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:39,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:39,144 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:01:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1926932651, now seen corresponding path program 1 times [2022-11-25 17:01:39,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:39,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405185365] [2022-11-25 17:01:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:39,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:39,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405185365] [2022-11-25 17:01:39,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405185365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:39,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724671022] [2022-11-25 17:01:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:39,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:39,835 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:39,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:01:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:39,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:01:39,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:40,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:01:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:40,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:01:40,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:40,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:01:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:40,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:41,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:41,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2022-11-25 17:01:41,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:41,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 397 treesize of output 403 [2022-11-25 17:01:41,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:41,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 334 treesize of output 284 [2022-11-25 17:01:41,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:41,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-25 17:01:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:42,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724671022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:42,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:42,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-11-25 17:01:42,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149226743] [2022-11-25 17:01:42,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:42,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:01:42,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:42,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:01:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=651, Unknown=2, NotChecked=0, Total=756 [2022-11-25 17:01:45,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:01:45,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 474 transitions, 8033 flow. Second operand has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:45,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:45,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:01:45,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:48,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:01:50,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:01:54,116 INFO L130 PetriNetUnfolder]: 1550/2928 cut-off events. [2022-11-25 17:01:54,116 INFO L131 PetriNetUnfolder]: For 66577/66577 co-relation queries the response was YES. [2022-11-25 17:01:54,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29149 conditions, 2928 events. 1550/2928 cut-off events. For 66577/66577 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19375 event pairs, 287 based on Foata normal form. 20/2829 useless extension candidates. Maximal degree in co-relation 29076. Up to 2519 conditions per place. [2022-11-25 17:01:54,143 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 454 selfloop transitions, 135 changer transitions 1/591 dead transitions. [2022-11-25 17:01:54,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 591 transitions, 11159 flow [2022-11-25 17:01:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 17:01:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 17:01:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2942 transitions. [2022-11-25 17:01:54,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3131119625372499 [2022-11-25 17:01:54,148 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2942 transitions. [2022-11-25 17:01:54,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2942 transitions. [2022-11-25 17:01:54,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:54,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2942 transitions. [2022-11-25 17:01:54,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 101.44827586206897) internal successors, (2942), 29 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:54,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 324.0) internal successors, (9720), 30 states have internal predecessors, (9720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:54,161 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 324.0) internal successors, (9720), 30 states have internal predecessors, (9720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:54,161 INFO L175 Difference]: Start difference. First operand has 221 places, 474 transitions, 8033 flow. Second operand 29 states and 2942 transitions. [2022-11-25 17:01:54,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 591 transitions, 11159 flow [2022-11-25 17:01:54,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 591 transitions, 10327 flow, removed 296 selfloop flow, removed 9 redundant places. [2022-11-25 17:01:54,568 INFO L231 Difference]: Finished difference. Result has 249 places, 521 transitions, 8707 flow [2022-11-25 17:01:54,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6928, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8707, PETRI_PLACES=249, PETRI_TRANSITIONS=521} [2022-11-25 17:01:54,569 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 218 predicate places. [2022-11-25 17:01:54,569 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 521 transitions, 8707 flow [2022-11-25 17:01:54,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:54,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:54,570 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:54,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:54,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 17:01:54,771 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:01:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1863045069, now seen corresponding path program 2 times [2022-11-25 17:01:54,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:54,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916749683] [2022-11-25 17:01:54,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:54,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:55,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:55,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916749683] [2022-11-25 17:01:55,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916749683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:55,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696211249] [2022-11-25 17:01:55,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:01:55,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:55,431 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:55,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:01:55,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:01:55,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:01:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:01:55,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:55,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:55,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-11-25 17:01:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:01:55,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696211249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:55,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:55,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 15 [2022-11-25 17:01:55,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900329219] [2022-11-25 17:01:55,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:55,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:01:55,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:01:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:01:56,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-11-25 17:01:56,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 521 transitions, 8707 flow. Second operand has 17 states, 17 states have (on average 122.70588235294117) internal successors, (2086), 17 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:56,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:56,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-11-25 17:01:56,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:58,232 INFO L130 PetriNetUnfolder]: 1306/2451 cut-off events. [2022-11-25 17:01:58,232 INFO L131 PetriNetUnfolder]: For 63800/63800 co-relation queries the response was YES. [2022-11-25 17:01:58,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24338 conditions, 2451 events. 1306/2451 cut-off events. For 63800/63800 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15541 event pairs, 106 based on Foata normal form. 141/2522 useless extension candidates. Maximal degree in co-relation 24257. Up to 1662 conditions per place. [2022-11-25 17:01:58,256 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 273 selfloop transitions, 231 changer transitions 8/513 dead transitions. [2022-11-25 17:01:58,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 513 transitions, 9526 flow [2022-11-25 17:01:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:01:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 17:01:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2277 transitions. [2022-11-25 17:01:58,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3904320987654321 [2022-11-25 17:01:58,259 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2277 transitions. [2022-11-25 17:01:58,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2277 transitions. [2022-11-25 17:01:58,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:58,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2277 transitions. [2022-11-25 17:01:58,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 126.5) internal successors, (2277), 18 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:58,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:58,268 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:58,268 INFO L175 Difference]: Start difference. First operand has 249 places, 521 transitions, 8707 flow. Second operand 18 states and 2277 transitions. [2022-11-25 17:01:58,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 513 transitions, 9526 flow [2022-11-25 17:01:58,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 513 transitions, 9242 flow, removed 122 selfloop flow, removed 11 redundant places. [2022-11-25 17:01:58,649 INFO L231 Difference]: Finished difference. Result has 252 places, 466 transitions, 8147 flow [2022-11-25 17:01:58,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7176, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8147, PETRI_PLACES=252, PETRI_TRANSITIONS=466} [2022-11-25 17:01:58,650 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 221 predicate places. [2022-11-25 17:01:58,650 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 466 transitions, 8147 flow [2022-11-25 17:01:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.70588235294117) internal successors, (2086), 17 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:58,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:58,651 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:58,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:58,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 17:01:58,851 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:01:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:58,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1926963519, now seen corresponding path program 4 times [2022-11-25 17:01:58,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:58,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669301747] [2022-11-25 17:01:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:58,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:59,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:59,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669301747] [2022-11-25 17:01:59,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669301747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:59,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254061812] [2022-11-25 17:01:59,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:01:59,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:59,445 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:59,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:01:59,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:01:59,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 17:01:59,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:59,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:01:59,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:01:59,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:01:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:59,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:02:00,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:00,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 84 [2022-11-25 17:02:00,547 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-11-25 17:02:00,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 538 treesize of output 505 [2022-11-25 17:02:00,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:02:00,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:02:00,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:00,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 377 treesize of output 353 [2022-11-25 17:02:00,629 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-11-25 17:02:00,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 418 treesize of output 342 [2022-11-25 17:02:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:01,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254061812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:02:01,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:02:01,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-11-25 17:02:01,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580907987] [2022-11-25 17:02:01,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:02:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:02:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:01,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:02:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=608, Unknown=2, NotChecked=0, Total=756 [2022-11-25 17:02:02,644 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:02:02,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 466 transitions, 8147 flow. Second operand has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:02,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:02:02,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:02:02,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:02:05,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:02:07,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:02:09,620 INFO L130 PetriNetUnfolder]: 1470/2696 cut-off events. [2022-11-25 17:02:09,620 INFO L131 PetriNetUnfolder]: For 65659/65659 co-relation queries the response was YES. [2022-11-25 17:02:09,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27295 conditions, 2696 events. 1470/2696 cut-off events. For 65659/65659 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 16987 event pairs, 159 based on Foata normal form. 24/2662 useless extension candidates. Maximal degree in co-relation 27214. Up to 2209 conditions per place. [2022-11-25 17:02:09,666 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 423 selfloop transitions, 151 changer transitions 0/575 dead transitions. [2022-11-25 17:02:09,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 575 transitions, 11016 flow [2022-11-25 17:02:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:02:09,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:02:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2631 transitions. [2022-11-25 17:02:09,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3123219373219373 [2022-11-25 17:02:09,671 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2631 transitions. [2022-11-25 17:02:09,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2631 transitions. [2022-11-25 17:02:09,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:02:09,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2631 transitions. [2022-11-25 17:02:09,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 101.1923076923077) internal successors, (2631), 26 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:09,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:09,683 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:09,683 INFO L175 Difference]: Start difference. First operand has 252 places, 466 transitions, 8147 flow. Second operand 26 states and 2631 transitions. [2022-11-25 17:02:09,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 575 transitions, 11016 flow [2022-11-25 17:02:10,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 575 transitions, 10651 flow, removed 58 selfloop flow, removed 9 redundant places. [2022-11-25 17:02:10,078 INFO L231 Difference]: Finished difference. Result has 272 places, 512 transitions, 9145 flow [2022-11-25 17:02:10,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9145, PETRI_PLACES=272, PETRI_TRANSITIONS=512} [2022-11-25 17:02:10,079 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 241 predicate places. [2022-11-25 17:02:10,079 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 512 transitions, 9145 flow [2022-11-25 17:02:10,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:10,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:02:10,080 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:02:10,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 17:02:10,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 17:02:10,280 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:02:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1926932705, now seen corresponding path program 2 times [2022-11-25 17:02:10,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:10,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109654188] [2022-11-25 17:02:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:10,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:02:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109654188] [2022-11-25 17:02:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109654188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:02:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263733478] [2022-11-25 17:02:10,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:02:10,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:02:10,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:02:10,924 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:02:10,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:02:11,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:02:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:02:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 17:02:11,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:02:11,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:02:11,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:02:11,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:02:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:11,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:02:14,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:14,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2022-11-25 17:02:14,044 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:02:14,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 136 [2022-11-25 17:02:14,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:02:14,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 86 [2022-11-25 17:02:14,065 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-25 17:02:14,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 88 [2022-11-25 17:02:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:14,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263733478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:02:14,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:02:14,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-25 17:02:14,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462686545] [2022-11-25 17:02:14,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:02:14,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:02:14,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:14,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:02:14,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=531, Unknown=2, NotChecked=0, Total=650 [2022-11-25 17:02:16,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:02:19,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:02:21,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:02:23,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:02:25,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:02:26,005 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:02:26,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 512 transitions, 9145 flow. Second operand has 26 states, 26 states have (on average 98.38461538461539) internal successors, (2558), 26 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:26,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:02:26,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:02:26,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:02:28,329 INFO L130 PetriNetUnfolder]: 1149/2216 cut-off events. [2022-11-25 17:02:28,329 INFO L131 PetriNetUnfolder]: For 62214/62214 co-relation queries the response was YES. [2022-11-25 17:02:28,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23333 conditions, 2216 events. 1149/2216 cut-off events. For 62214/62214 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14376 event pairs, 315 based on Foata normal form. 120/2288 useless extension candidates. Maximal degree in co-relation 23249. Up to 1730 conditions per place. [2022-11-25 17:02:28,352 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 341 selfloop transitions, 104 changer transitions 23/469 dead transitions. [2022-11-25 17:02:28,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 469 transitions, 9419 flow [2022-11-25 17:02:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:02:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:02:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2229 transitions. [2022-11-25 17:02:28,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3127104377104377 [2022-11-25 17:02:28,356 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2229 transitions. [2022-11-25 17:02:28,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2229 transitions. [2022-11-25 17:02:28,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:02:28,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2229 transitions. [2022-11-25 17:02:28,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 101.31818181818181) internal successors, (2229), 22 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:28,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:28,366 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:28,366 INFO L175 Difference]: Start difference. First operand has 272 places, 512 transitions, 9145 flow. Second operand 22 states and 2229 transitions. [2022-11-25 17:02:28,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 469 transitions, 9419 flow [2022-11-25 17:02:28,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 469 transitions, 9018 flow, removed 159 selfloop flow, removed 20 redundant places. [2022-11-25 17:02:28,682 INFO L231 Difference]: Finished difference. Result has 270 places, 408 transitions, 7589 flow [2022-11-25 17:02:28,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7294, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7589, PETRI_PLACES=270, PETRI_TRANSITIONS=408} [2022-11-25 17:02:28,683 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 239 predicate places. [2022-11-25 17:02:28,683 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 408 transitions, 7589 flow [2022-11-25 17:02:28,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 98.38461538461539) internal successors, (2558), 26 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:28,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:02:28,684 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:02:28,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-25 17:02:28,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 17:02:28,889 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:02:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:28,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1863045015, now seen corresponding path program 3 times [2022-11-25 17:02:28,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:28,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91380478] [2022-11-25 17:02:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:29,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:02:29,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91380478] [2022-11-25 17:02:29,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91380478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:02:29,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455997542] [2022-11-25 17:02:29,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:02:29,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:02:29,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:02:29,495 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:02:29,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 17:02:29,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:02:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:02:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:02:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:02:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:02:29,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:02:29,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:29,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2022-11-25 17:02:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:02:29,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455997542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:02:29,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:02:29,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2022-11-25 17:02:29,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077872596] [2022-11-25 17:02:29,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:02:29,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:02:29,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:29,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:02:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:02:30,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-11-25 17:02:30,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 408 transitions, 7589 flow. Second operand has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:30,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:02:30,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-11-25 17:02:30,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:02:31,641 INFO L130 PetriNetUnfolder]: 1095/2084 cut-off events. [2022-11-25 17:02:31,641 INFO L131 PetriNetUnfolder]: For 63577/63577 co-relation queries the response was YES. [2022-11-25 17:02:31,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21727 conditions, 2084 events. 1095/2084 cut-off events. For 63577/63577 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12958 event pairs, 114 based on Foata normal form. 32/2068 useless extension candidates. Maximal degree in co-relation 21643. Up to 1724 conditions per place. [2022-11-25 17:02:31,663 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 301 selfloop transitions, 124 changer transitions 14/440 dead transitions. [2022-11-25 17:02:31,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 440 transitions, 8857 flow [2022-11-25 17:02:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:02:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:02:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1886 transitions. [2022-11-25 17:02:31,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3880658436213992 [2022-11-25 17:02:31,666 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1886 transitions. [2022-11-25 17:02:31,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1886 transitions. [2022-11-25 17:02:31,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:02:31,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1886 transitions. [2022-11-25 17:02:31,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 125.73333333333333) internal successors, (1886), 15 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:31,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:31,674 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:31,674 INFO L175 Difference]: Start difference. First operand has 270 places, 408 transitions, 7589 flow. Second operand 15 states and 1886 transitions. [2022-11-25 17:02:31,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 440 transitions, 8857 flow [2022-11-25 17:02:32,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 440 transitions, 8512 flow, removed 90 selfloop flow, removed 15 redundant places. [2022-11-25 17:02:32,028 INFO L231 Difference]: Finished difference. Result has 261 places, 410 transitions, 7548 flow [2022-11-25 17:02:32,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7126, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7548, PETRI_PLACES=261, PETRI_TRANSITIONS=410} [2022-11-25 17:02:32,029 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 230 predicate places. [2022-11-25 17:02:32,029 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 410 transitions, 7548 flow [2022-11-25 17:02:32,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 122.73333333333333) internal successors, (1841), 15 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:32,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:02:32,030 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:02:32,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-25 17:02:32,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:02:32,241 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:02:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1483871179, now seen corresponding path program 5 times [2022-11-25 17:02:32,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:32,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593267417] [2022-11-25 17:02:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:32,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:33,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:02:33,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593267417] [2022-11-25 17:02:33,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593267417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:02:33,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302891482] [2022-11-25 17:02:33,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:02:33,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:02:33,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:02:33,073 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:02:33,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 17:02:33,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:02:33,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:02:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:02:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:02:33,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:02:33,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:02:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:02:33,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:02:33,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:33,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 114 [2022-11-25 17:02:33,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:33,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 54 [2022-11-25 17:02:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:02:34,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302891482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:02:34,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:02:34,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2022-11-25 17:02:34,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343622356] [2022-11-25 17:02:34,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:02:34,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:02:34,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:34,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:02:34,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=571, Unknown=6, NotChecked=0, Total=650 [2022-11-25 17:02:35,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-11-25 17:02:35,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 410 transitions, 7548 flow. Second operand has 26 states, 26 states have (on average 101.34615384615384) internal successors, (2635), 26 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:35,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:02:35,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-11-25 17:02:35,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:02:58,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:03:02,709 INFO L130 PetriNetUnfolder]: 1436/2597 cut-off events. [2022-11-25 17:03:02,710 INFO L131 PetriNetUnfolder]: For 75707/75707 co-relation queries the response was YES. [2022-11-25 17:03:02,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28258 conditions, 2597 events. 1436/2597 cut-off events. For 75707/75707 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 15666 event pairs, 51 based on Foata normal form. 85/2614 useless extension candidates. Maximal degree in co-relation 28178. Up to 1428 conditions per place. [2022-11-25 17:03:02,741 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 206 selfloop transitions, 370 changer transitions 29/606 dead transitions. [2022-11-25 17:03:02,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 606 transitions, 12219 flow [2022-11-25 17:03:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-25 17:03:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-25 17:03:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 5335 transitions. [2022-11-25 17:03:02,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3228637133865892 [2022-11-25 17:03:02,748 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 5335 transitions. [2022-11-25 17:03:02,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 5335 transitions. [2022-11-25 17:03:02,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:02,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 5335 transitions. [2022-11-25 17:03:02,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 104.6078431372549) internal successors, (5335), 51 states have internal predecessors, (5335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:02,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 324.0) internal successors, (16848), 52 states have internal predecessors, (16848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:02,774 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 324.0) internal successors, (16848), 52 states have internal predecessors, (16848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:02,775 INFO L175 Difference]: Start difference. First operand has 261 places, 410 transitions, 7548 flow. Second operand 51 states and 5335 transitions. [2022-11-25 17:03:02,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 606 transitions, 12219 flow [2022-11-25 17:03:03,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 606 transitions, 11949 flow, removed 71 selfloop flow, removed 13 redundant places. [2022-11-25 17:03:03,101 INFO L231 Difference]: Finished difference. Result has 307 places, 491 transitions, 10328 flow [2022-11-25 17:03:03,102 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6623, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=10328, PETRI_PLACES=307, PETRI_TRANSITIONS=491} [2022-11-25 17:03:03,102 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 276 predicate places. [2022-11-25 17:03:03,102 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 491 transitions, 10328 flow [2022-11-25 17:03:03,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 101.34615384615384) internal successors, (2635), 26 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:03,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:03,103 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:03,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:03,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 17:03:03,304 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:03:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:03,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1346983371, now seen corresponding path program 3 times [2022-11-25 17:03:03,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:03,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721663454] [2022-11-25 17:03:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:03,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:04,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:04,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721663454] [2022-11-25 17:03:04,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721663454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:04,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644671749] [2022-11-25 17:03:04,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:03:04,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:04,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:04,151 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:04,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 17:03:04,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:03:04,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:04,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:03:04,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:04,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:03:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:03:04,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:03:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:03:04,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:03:04,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:03:04,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-11-25 17:03:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:04,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:05,009 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1186 (Array Int Int))) (< 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1186) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ 2147483649 (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))))) is different from false [2022-11-25 17:03:05,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:05,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 77 [2022-11-25 17:03:05,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:05,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 189 [2022-11-25 17:03:05,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 67 [2022-11-25 17:03:05,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:05,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 71 [2022-11-25 17:03:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:06,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644671749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:06,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:06,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-25 17:03:06,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134154905] [2022-11-25 17:03:06,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:06,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:03:06,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:06,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:03:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=651, Unknown=2, NotChecked=52, Total=812 [2022-11-25 17:03:06,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:03:06,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 491 transitions, 10328 flow. Second operand has 29 states, 29 states have (on average 98.24137931034483) internal successors, (2849), 29 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:06,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:06,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:03:06,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:10,258 INFO L130 PetriNetUnfolder]: 1403/2512 cut-off events. [2022-11-25 17:03:10,259 INFO L131 PetriNetUnfolder]: For 91407/91407 co-relation queries the response was YES. [2022-11-25 17:03:10,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30617 conditions, 2512 events. 1403/2512 cut-off events. For 91407/91407 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14813 event pairs, 379 based on Foata normal form. 14/2466 useless extension candidates. Maximal degree in co-relation 30523. Up to 2317 conditions per place. [2022-11-25 17:03:10,292 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 449 selfloop transitions, 43 changer transitions 32/525 dead transitions. [2022-11-25 17:03:10,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 525 transitions, 11724 flow [2022-11-25 17:03:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:03:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 17:03:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2322 transitions. [2022-11-25 17:03:10,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3115942028985507 [2022-11-25 17:03:10,295 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2322 transitions. [2022-11-25 17:03:10,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2322 transitions. [2022-11-25 17:03:10,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:10,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2322 transitions. [2022-11-25 17:03:10,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 100.95652173913044) internal successors, (2322), 23 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:10,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:10,302 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:10,302 INFO L175 Difference]: Start difference. First operand has 307 places, 491 transitions, 10328 flow. Second operand 23 states and 2322 transitions. [2022-11-25 17:03:10,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 525 transitions, 11724 flow [2022-11-25 17:03:10,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 525 transitions, 10248 flow, removed 562 selfloop flow, removed 25 redundant places. [2022-11-25 17:03:10,923 INFO L231 Difference]: Finished difference. Result has 296 places, 476 transitions, 8679 flow [2022-11-25 17:03:10,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8814, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8679, PETRI_PLACES=296, PETRI_TRANSITIONS=476} [2022-11-25 17:03:10,923 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 265 predicate places. [2022-11-25 17:03:10,924 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 476 transitions, 8679 flow [2022-11-25 17:03:10,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.24137931034483) internal successors, (2849), 29 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:10,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:10,924 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:10,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:11,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 17:03:11,125 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:03:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:11,125 INFO L85 PathProgramCache]: Analyzing trace with hash -171546369, now seen corresponding path program 3 times [2022-11-25 17:03:11,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:11,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597494324] [2022-11-25 17:03:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:11,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:03:11,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:11,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597494324] [2022-11-25 17:03:11,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597494324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:11,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051770620] [2022-11-25 17:03:11,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:03:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:11,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:11,230 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:11,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 17:03:11,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:03:11,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:11,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:03:11,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:03:11,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:03:11,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051770620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:11,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:11,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 8 [2022-11-25 17:03:11,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624166272] [2022-11-25 17:03:11,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:11,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:03:11,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:03:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:03:11,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2022-11-25 17:03:11,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 476 transitions, 8679 flow. Second operand has 10 states, 10 states have (on average 138.4) internal successors, (1384), 10 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:11,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:11,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2022-11-25 17:03:11,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:12,666 INFO L130 PetriNetUnfolder]: 1720/3022 cut-off events. [2022-11-25 17:03:12,666 INFO L131 PetriNetUnfolder]: For 118024/118024 co-relation queries the response was YES. [2022-11-25 17:03:12,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34786 conditions, 3022 events. 1720/3022 cut-off events. For 118024/118024 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18226 event pairs, 108 based on Foata normal form. 32/2970 useless extension candidates. Maximal degree in co-relation 34696. Up to 1729 conditions per place. [2022-11-25 17:03:12,699 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 260 selfloop transitions, 259 changer transitions 21/541 dead transitions. [2022-11-25 17:03:12,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 541 transitions, 11157 flow [2022-11-25 17:03:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:03:12,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:03:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 728 transitions. [2022-11-25 17:03:12,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44938271604938274 [2022-11-25 17:03:12,700 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 728 transitions. [2022-11-25 17:03:12,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 728 transitions. [2022-11-25 17:03:12,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:12,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 728 transitions. [2022-11-25 17:03:12,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:12,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:12,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:12,703 INFO L175 Difference]: Start difference. First operand has 296 places, 476 transitions, 8679 flow. Second operand 5 states and 728 transitions. [2022-11-25 17:03:12,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 541 transitions, 11157 flow [2022-11-25 17:03:13,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 541 transitions, 10772 flow, removed 67 selfloop flow, removed 20 redundant places. [2022-11-25 17:03:13,196 INFO L231 Difference]: Finished difference. Result has 273 places, 507 transitions, 10323 flow [2022-11-25 17:03:13,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8176, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10323, PETRI_PLACES=273, PETRI_TRANSITIONS=507} [2022-11-25 17:03:13,197 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 242 predicate places. [2022-11-25 17:03:13,197 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 507 transitions, 10323 flow [2022-11-25 17:03:13,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.4) internal successors, (1384), 10 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:13,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:13,198 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:13,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:13,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 17:03:13,399 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:03:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash -8157305, now seen corresponding path program 6 times [2022-11-25 17:03:13,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:13,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481746289] [2022-11-25 17:03:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:13,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:14,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:14,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481746289] [2022-11-25 17:03:14,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481746289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:14,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429041242] [2022-11-25 17:03:14,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:03:14,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:14,517 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:14,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 17:03:14,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:03:14,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:14,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:03:14,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:03:14,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:15,082 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-11-25 17:03:15,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 49 [2022-11-25 17:03:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:03:15,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429041242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:15,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:15,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 20 [2022-11-25 17:03:15,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315226703] [2022-11-25 17:03:15,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:15,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:03:15,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:15,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:03:15,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:03:16,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-11-25 17:03:16,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 507 transitions, 10323 flow. Second operand has 22 states, 22 states have (on average 122.45454545454545) internal successors, (2694), 22 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:16,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:16,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-11-25 17:03:16,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:18,206 INFO L130 PetriNetUnfolder]: 1770/3099 cut-off events. [2022-11-25 17:03:18,207 INFO L131 PetriNetUnfolder]: For 124469/124469 co-relation queries the response was YES. [2022-11-25 17:03:18,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37627 conditions, 3099 events. 1770/3099 cut-off events. For 124469/124469 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18842 event pairs, 308 based on Foata normal form. 22/3037 useless extension candidates. Maximal degree in co-relation 37538. Up to 2391 conditions per place. [2022-11-25 17:03:18,244 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 386 selfloop transitions, 204 changer transitions 0/591 dead transitions. [2022-11-25 17:03:18,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 591 transitions, 13132 flow [2022-11-25 17:03:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:03:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:03:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2771 transitions. [2022-11-25 17:03:18,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38874859708193044 [2022-11-25 17:03:18,249 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2771 transitions. [2022-11-25 17:03:18,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2771 transitions. [2022-11-25 17:03:18,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:18,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2771 transitions. [2022-11-25 17:03:18,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 125.95454545454545) internal successors, (2771), 22 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:18,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:18,261 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:18,261 INFO L175 Difference]: Start difference. First operand has 273 places, 507 transitions, 10323 flow. Second operand 22 states and 2771 transitions. [2022-11-25 17:03:18,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 591 transitions, 13132 flow [2022-11-25 17:03:19,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 591 transitions, 11961 flow, removed 557 selfloop flow, removed 21 redundant places. [2022-11-25 17:03:19,178 INFO L231 Difference]: Finished difference. Result has 262 places, 525 transitions, 10359 flow [2022-11-25 17:03:19,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9393, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10359, PETRI_PLACES=262, PETRI_TRANSITIONS=525} [2022-11-25 17:03:19,179 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 231 predicate places. [2022-11-25 17:03:19,179 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 525 transitions, 10359 flow [2022-11-25 17:03:19,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 122.45454545454545) internal successors, (2694), 22 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:19,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:19,180 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:19,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:19,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 17:03:19,395 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:03:19,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:19,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1419981381, now seen corresponding path program 7 times [2022-11-25 17:03:19,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:19,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65071206] [2022-11-25 17:03:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:19,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65071206] [2022-11-25 17:03:20,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65071206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:20,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399071499] [2022-11-25 17:03:20,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:03:20,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:20,446 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:20,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 17:03:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:03:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:03:20,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:20,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:20,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 67 [2022-11-25 17:03:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:03:21,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399071499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:21,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:21,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 20 [2022-11-25 17:03:21,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827620476] [2022-11-25 17:03:21,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:21,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:03:21,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:21,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:03:21,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:03:22,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-11-25 17:03:22,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 525 transitions, 10359 flow. Second operand has 22 states, 22 states have (on average 122.45454545454545) internal successors, (2694), 22 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:22,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:22,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-11-25 17:03:22,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:24,434 INFO L130 PetriNetUnfolder]: 1900/3345 cut-off events. [2022-11-25 17:03:24,435 INFO L131 PetriNetUnfolder]: For 88981/88981 co-relation queries the response was YES. [2022-11-25 17:03:24,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36000 conditions, 3345 events. 1900/3345 cut-off events. For 88981/88981 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20425 event pairs, 262 based on Foata normal form. 60/3321 useless extension candidates. Maximal degree in co-relation 35912. Up to 2499 conditions per place. [2022-11-25 17:03:24,479 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 422 selfloop transitions, 225 changer transitions 9/657 dead transitions. [2022-11-25 17:03:24,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 657 transitions, 14051 flow [2022-11-25 17:03:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:03:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:03:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3264 transitions. [2022-11-25 17:03:24,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38746438746438744 [2022-11-25 17:03:24,566 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3264 transitions. [2022-11-25 17:03:24,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3264 transitions. [2022-11-25 17:03:24,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:24,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3264 transitions. [2022-11-25 17:03:24,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 125.53846153846153) internal successors, (3264), 26 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:24,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:24,579 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:24,580 INFO L175 Difference]: Start difference. First operand has 262 places, 525 transitions, 10359 flow. Second operand 26 states and 3264 transitions. [2022-11-25 17:03:24,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 657 transitions, 14051 flow [2022-11-25 17:03:25,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 657 transitions, 13623 flow, removed 78 selfloop flow, removed 12 redundant places. [2022-11-25 17:03:25,147 INFO L231 Difference]: Finished difference. Result has 284 places, 581 transitions, 12021 flow [2022-11-25 17:03:25,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9809, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12021, PETRI_PLACES=284, PETRI_TRANSITIONS=581} [2022-11-25 17:03:25,149 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 253 predicate places. [2022-11-25 17:03:25,149 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 581 transitions, 12021 flow [2022-11-25 17:03:25,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 122.45454545454545) internal successors, (2694), 22 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:25,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:25,150 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:25,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:25,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-25 17:03:25,356 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:03:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1863014201, now seen corresponding path program 8 times [2022-11-25 17:03:25,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:25,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860238874] [2022-11-25 17:03:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:25,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:26,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:26,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860238874] [2022-11-25 17:03:26,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860238874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:26,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562219624] [2022-11-25 17:03:26,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:03:26,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:26,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:26,674 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:26,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 17:03:26,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:03:26,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:26,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:03:26,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:03:27,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:03:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:03:27,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:27,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:27,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 114 [2022-11-25 17:03:27,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:27,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 54 [2022-11-25 17:03:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:03:27,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562219624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:27,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:27,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2022-11-25 17:03:27,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650338794] [2022-11-25 17:03:27,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:27,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:03:27,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:27,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:03:27,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=666, Unknown=2, NotChecked=0, Total=756 [2022-11-25 17:03:28,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-11-25 17:03:28,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 581 transitions, 12021 flow. Second operand has 28 states, 28 states have (on average 101.32142857142857) internal successors, (2837), 28 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:28,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:28,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-11-25 17:03:28,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:29,773 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~q_front~0 4))) (let ((.cse0 (select |c_#memory_int| c_~q~0.base)) (.cse3 (+ .cse1 c_~q~0.offset))) (and (<= 0 c_~q_front~0) (= (select .cse0 (+ .cse1 4)) 1) (= c_~s~0 0) (forall ((v_ArrVal_1339 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1339) c_~q~0.base))) (or (not (= (select .cse2 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ (select .cse2 .cse3) (select .cse2 (+ .cse1 c_~q~0.offset 4))) 2147483648)))) (= c_~q~0.offset 0) (= (select .cse0 .cse3) 1)))) is different from false [2022-11-25 17:03:32,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:03:34,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:03:35,713 INFO L130 PetriNetUnfolder]: 2123/3718 cut-off events. [2022-11-25 17:03:35,713 INFO L131 PetriNetUnfolder]: For 108914/108914 co-relation queries the response was YES. [2022-11-25 17:03:35,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41162 conditions, 3718 events. 2123/3718 cut-off events. For 108914/108914 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23285 event pairs, 86 based on Foata normal form. 24/3666 useless extension candidates. Maximal degree in co-relation 41066. Up to 2445 conditions per place. [2022-11-25 17:03:35,759 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 380 selfloop transitions, 353 changer transitions 0/734 dead transitions. [2022-11-25 17:03:35,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 734 transitions, 16149 flow [2022-11-25 17:03:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:03:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:03:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2733 transitions. [2022-11-25 17:03:35,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3244301994301994 [2022-11-25 17:03:35,763 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2733 transitions. [2022-11-25 17:03:35,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2733 transitions. [2022-11-25 17:03:35,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:35,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2733 transitions. [2022-11-25 17:03:35,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 105.11538461538461) internal successors, (2733), 26 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:35,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:35,775 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:35,776 INFO L175 Difference]: Start difference. First operand has 284 places, 581 transitions, 12021 flow. Second operand 26 states and 2733 transitions. [2022-11-25 17:03:35,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 734 transitions, 16149 flow [2022-11-25 17:03:36,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 734 transitions, 15603 flow, removed 252 selfloop flow, removed 8 redundant places. [2022-11-25 17:03:36,604 INFO L231 Difference]: Finished difference. Result has 307 places, 645 transitions, 13656 flow [2022-11-25 17:03:36,605 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=11495, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13656, PETRI_PLACES=307, PETRI_TRANSITIONS=645} [2022-11-25 17:03:36,716 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 276 predicate places. [2022-11-25 17:03:36,716 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 645 transitions, 13656 flow [2022-11-25 17:03:36,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.32142857142857) internal successors, (2837), 28 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:36,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:36,717 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:36,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:36,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:36,918 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:03:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1755332001, now seen corresponding path program 4 times [2022-11-25 17:03:36,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:36,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573453956] [2022-11-25 17:03:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:36,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:38,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:38,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573453956] [2022-11-25 17:03:38,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573453956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:38,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047953368] [2022-11-25 17:03:38,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:03:38,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:38,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:38,191 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:38,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 17:03:38,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:03:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:38,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:03:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:38,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:03:38,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 17:03:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:38,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:39,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:39,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 183 [2022-11-25 17:03:39,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:39,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2022-11-25 17:03:39,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:39,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 83 [2022-11-25 17:03:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:39,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047953368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:39,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:39,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:03:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785012585] [2022-11-25 17:03:39,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:39,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:03:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:03:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=999, Unknown=4, NotChecked=0, Total=1190 [2022-11-25 17:03:42,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:03:42,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 645 transitions, 13656 flow. Second operand has 35 states, 35 states have (on average 98.2) internal successors, (3437), 35 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:42,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:42,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:03:42,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:45,189 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4 c_~q_back~0)) (.cse0 (* c_~q_front~0 4))) (and (or (and (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|) (= .cse0 .cse1)) (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~q_back~0 0) (<= c_~n~0 (+ 2 c_~q_back~0))) (let ((.cse8 (+ c_~q_back~0 1))) (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset .cse1)) 1)) (let ((.cse5 (+ .cse0 c_~q~0.offset)) (.cse4 (+ .cse0 c_~q~0.offset 4))) (and (forall ((v_ArrVal_1378 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1378) c_~q~0.base))) (let ((.cse2 (select .cse3 .cse5))) (or (< 0 (+ .cse2 1)) (< 0 (+ 2147483649 .cse2 (select .cse3 .cse4))))))) (forall ((v_ArrVal_1378 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1378) c_~q~0.base))) (let ((.cse6 (select .cse7 .cse4))) (or (< 0 (+ 2147483650 .cse6)) (< 0 (+ 2147483649 (select .cse7 .cse5) .cse6)))))))) (not (< .cse8 c_~n~0)) (not (<= 0 .cse8)))))) is different from false [2022-11-25 17:03:48,364 INFO L130 PetriNetUnfolder]: 2842/5051 cut-off events. [2022-11-25 17:03:48,364 INFO L131 PetriNetUnfolder]: For 159778/159778 co-relation queries the response was YES. [2022-11-25 17:03:48,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59268 conditions, 5051 events. 2842/5051 cut-off events. For 159778/159778 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34477 event pairs, 164 based on Foata normal form. 132/4989 useless extension candidates. Maximal degree in co-relation 59166. Up to 2785 conditions per place. [2022-11-25 17:03:48,448 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 593 selfloop transitions, 586 changer transitions 0/1180 dead transitions. [2022-11-25 17:03:48,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1180 transitions, 27066 flow [2022-11-25 17:03:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 17:03:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-25 17:03:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4716 transitions. [2022-11-25 17:03:48,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3164251207729469 [2022-11-25 17:03:48,455 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4716 transitions. [2022-11-25 17:03:48,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4716 transitions. [2022-11-25 17:03:48,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:48,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4716 transitions. [2022-11-25 17:03:48,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 102.52173913043478) internal successors, (4716), 46 states have internal predecessors, (4716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:48,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 324.0) internal successors, (15228), 47 states have internal predecessors, (15228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:48,469 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 324.0) internal successors, (15228), 47 states have internal predecessors, (15228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:48,470 INFO L175 Difference]: Start difference. First operand has 307 places, 645 transitions, 13656 flow. Second operand 46 states and 4716 transitions. [2022-11-25 17:03:48,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1180 transitions, 27066 flow [2022-11-25 17:03:49,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1180 transitions, 26262 flow, removed 209 selfloop flow, removed 12 redundant places. [2022-11-25 17:03:49,643 INFO L231 Difference]: Finished difference. Result has 362 places, 1008 transitions, 23934 flow [2022-11-25 17:03:49,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=13195, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=23934, PETRI_PLACES=362, PETRI_TRANSITIONS=1008} [2022-11-25 17:03:49,645 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 331 predicate places. [2022-11-25 17:03:49,645 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1008 transitions, 23934 flow [2022-11-25 17:03:49,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 98.2) internal successors, (3437), 35 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:49,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:49,646 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:49,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-25 17:03:49,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:49,847 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:03:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1674072255, now seen corresponding path program 4 times [2022-11-25 17:03:49,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:49,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234271894] [2022-11-25 17:03:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:49,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:03:49,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234271894] [2022-11-25 17:03:49,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234271894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:49,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583684042] [2022-11-25 17:03:49,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:03:49,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:49,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:49,991 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:50,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 17:03:50,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:03:50,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:50,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:03:50,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:03:50,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:03:50,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583684042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:50,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:50,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-25 17:03:50,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302140058] [2022-11-25 17:03:50,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:50,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:03:50,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:50,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:03:50,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:03:50,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2022-11-25 17:03:50,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1008 transitions, 23934 flow. Second operand has 18 states, 18 states have (on average 131.94444444444446) internal successors, (2375), 18 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:50,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:50,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2022-11-25 17:03:50,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:53,375 INFO L130 PetriNetUnfolder]: 2792/4926 cut-off events. [2022-11-25 17:03:53,375 INFO L131 PetriNetUnfolder]: For 214115/214115 co-relation queries the response was YES. [2022-11-25 17:03:53,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64909 conditions, 4926 events. 2792/4926 cut-off events. For 214115/214115 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 33118 event pairs, 812 based on Foata normal form. 9/4751 useless extension candidates. Maximal degree in co-relation 64784. Up to 4885 conditions per place. [2022-11-25 17:03:53,448 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 954 selfloop transitions, 4 changer transitions 19/978 dead transitions. [2022-11-25 17:03:53,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 978 transitions, 25309 flow [2022-11-25 17:03:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:03:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:03:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1072 transitions. [2022-11-25 17:03:53,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41358024691358025 [2022-11-25 17:03:53,451 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1072 transitions. [2022-11-25 17:03:53,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1072 transitions. [2022-11-25 17:03:53,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:53,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1072 transitions. [2022-11-25 17:03:53,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.0) internal successors, (1072), 8 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:53,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:53,453 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:53,453 INFO L175 Difference]: Start difference. First operand has 362 places, 1008 transitions, 23934 flow. Second operand 8 states and 1072 transitions. [2022-11-25 17:03:53,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 978 transitions, 25309 flow [2022-11-25 17:03:55,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 978 transitions, 23054 flow, removed 1061 selfloop flow, removed 25 redundant places. [2022-11-25 17:03:55,624 INFO L231 Difference]: Finished difference. Result has 332 places, 959 transitions, 20845 flow [2022-11-25 17:03:55,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=21056, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=968, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20845, PETRI_PLACES=332, PETRI_TRANSITIONS=959} [2022-11-25 17:03:55,625 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 301 predicate places. [2022-11-25 17:03:55,625 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 959 transitions, 20845 flow [2022-11-25 17:03:55,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.94444444444446) internal successors, (2375), 18 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:55,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:03:55,626 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:03:55,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 17:03:55,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:55,827 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:03:55,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:03:55,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1701694871, now seen corresponding path program 5 times [2022-11-25 17:03:55,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:03:55,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678561301] [2022-11-25 17:03:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:03:55,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:03:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:03:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:03:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:03:57,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678561301] [2022-11-25 17:03:57,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678561301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:03:57,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664206197] [2022-11-25 17:03:57,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:03:57,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:03:57,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:03:57,119 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:03:57,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 17:03:57,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:03:57,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:03:57,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:03:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:03:57,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:03:57,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 17:03:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:03:57,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:03:57,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:03:57,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-11-25 17:03:57,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-11-25 17:03:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:03:57,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664206197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:03:57,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:03:57,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 25 [2022-11-25 17:03:57,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039136580] [2022-11-25 17:03:57,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:03:57,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:03:57,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:03:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:03:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=617, Unknown=2, NotChecked=0, Total=702 [2022-11-25 17:03:59,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-11-25 17:03:59,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 959 transitions, 20845 flow. Second operand has 27 states, 27 states have (on average 101.44444444444444) internal successors, (2739), 27 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:59,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:03:59,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-11-25 17:03:59,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:04:03,201 INFO L130 PetriNetUnfolder]: 3229/5637 cut-off events. [2022-11-25 17:04:03,201 INFO L131 PetriNetUnfolder]: For 230728/230728 co-relation queries the response was YES. [2022-11-25 17:04:03,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66257 conditions, 5637 events. 3229/5637 cut-off events. For 230728/230728 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38663 event pairs, 95 based on Foata normal form. 90/5555 useless extension candidates. Maximal degree in co-relation 66138. Up to 3089 conditions per place. [2022-11-25 17:04:03,288 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 529 selfloop transitions, 684 changer transitions 19/1233 dead transitions. [2022-11-25 17:04:03,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1233 transitions, 28931 flow [2022-11-25 17:04:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:04:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 17:04:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2107 transitions. [2022-11-25 17:04:03,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32515432098765434 [2022-11-25 17:04:03,293 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2107 transitions. [2022-11-25 17:04:03,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2107 transitions. [2022-11-25 17:04:03,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:04:03,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2107 transitions. [2022-11-25 17:04:03,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 105.35) internal successors, (2107), 20 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:03,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:03,302 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:03,302 INFO L175 Difference]: Start difference. First operand has 332 places, 959 transitions, 20845 flow. Second operand 20 states and 2107 transitions. [2022-11-25 17:04:03,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1233 transitions, 28931 flow [2022-11-25 17:04:05,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 1233 transitions, 28417 flow, removed 214 selfloop flow, removed 11 redundant places. [2022-11-25 17:04:05,342 INFO L231 Difference]: Finished difference. Result has 326 places, 1059 transitions, 24679 flow [2022-11-25 17:04:05,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=20279, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=563, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=24679, PETRI_PLACES=326, PETRI_TRANSITIONS=1059} [2022-11-25 17:04:05,343 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 295 predicate places. [2022-11-25 17:04:05,343 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1059 transitions, 24679 flow [2022-11-25 17:04:05,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 101.44444444444444) internal successors, (2739), 27 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:05,344 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:04:05,344 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:05,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:05,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 17:04:05,545 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:04:05,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:05,546 INFO L85 PathProgramCache]: Analyzing trace with hash -972084731, now seen corresponding path program 4 times [2022-11-25 17:04:05,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:05,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054083105] [2022-11-25 17:04:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:05,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:06,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:06,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054083105] [2022-11-25 17:04:06,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054083105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:06,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153444360] [2022-11-25 17:04:06,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:04:06,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:06,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:06,913 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:06,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 17:04:07,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:04:07,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:04:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:04:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:07,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:08,234 INFO L321 Elim1Store]: treesize reduction 36, result has 77.1 percent of original size [2022-11-25 17:04:08,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 139 [2022-11-25 17:04:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:08,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153444360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:08,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:08,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2022-11-25 17:04:08,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544660997] [2022-11-25 17:04:08,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:08,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:04:08,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:08,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:04:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 17:04:11,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2022-11-25 17:04:11,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1059 transitions, 24679 flow. Second operand has 36 states, 36 states have (on average 115.25) internal successors, (4149), 36 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:11,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:04:11,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2022-11-25 17:04:11,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:04:19,326 INFO L130 PetriNetUnfolder]: 3466/6115 cut-off events. [2022-11-25 17:04:19,326 INFO L131 PetriNetUnfolder]: For 223580/223580 co-relation queries the response was YES. [2022-11-25 17:04:19,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71665 conditions, 6115 events. 3466/6115 cut-off events. For 223580/223580 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 43070 event pairs, 562 based on Foata normal form. 100/5933 useless extension candidates. Maximal degree in co-relation 71550. Up to 3296 conditions per place. [2022-11-25 17:04:19,426 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 826 selfloop transitions, 474 changer transitions 0/1301 dead transitions. [2022-11-25 17:04:19,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1301 transitions, 31418 flow [2022-11-25 17:04:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:04:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 17:04:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4298 transitions. [2022-11-25 17:04:19,433 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36848422496570643 [2022-11-25 17:04:19,433 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4298 transitions. [2022-11-25 17:04:19,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4298 transitions. [2022-11-25 17:04:19,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:04:19,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4298 transitions. [2022-11-25 17:04:19,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 119.38888888888889) internal successors, (4298), 36 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:19,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 324.0) internal successors, (11988), 37 states have internal predecessors, (11988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:19,450 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 324.0) internal successors, (11988), 37 states have internal predecessors, (11988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:19,450 INFO L175 Difference]: Start difference. First operand has 326 places, 1059 transitions, 24679 flow. Second operand 36 states and 4298 transitions. [2022-11-25 17:04:19,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1301 transitions, 31418 flow [2022-11-25 17:04:21,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1301 transitions, 30961 flow, removed 164 selfloop flow, removed 13 redundant places. [2022-11-25 17:04:21,658 INFO L231 Difference]: Finished difference. Result has 357 places, 1179 transitions, 28610 flow [2022-11-25 17:04:21,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=23437, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=28610, PETRI_PLACES=357, PETRI_TRANSITIONS=1179} [2022-11-25 17:04:21,659 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 326 predicate places. [2022-11-25 17:04:21,659 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 1179 transitions, 28610 flow [2022-11-25 17:04:21,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 115.25) internal successors, (4149), 36 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:21,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:04:21,660 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:21,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:21,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:21,861 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:04:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:21,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1023027341, now seen corresponding path program 5 times [2022-11-25 17:04:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:21,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338422939] [2022-11-25 17:04:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:23,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:23,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338422939] [2022-11-25 17:04:23,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338422939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:23,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4422320] [2022-11-25 17:04:23,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:04:23,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:23,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:23,179 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:23,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 17:04:23,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:04:23,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:04:23,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:04:23,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:23,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:23,984 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:04:23,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2022-11-25 17:04:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:24,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4422320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:24,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:24,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 32 [2022-11-25 17:04:24,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251661201] [2022-11-25 17:04:24,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:24,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:04:24,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:24,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:04:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 17:04:27,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2022-11-25 17:04:27,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1179 transitions, 28610 flow. Second operand has 34 states, 34 states have (on average 115.32352941176471) internal successors, (3921), 34 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:27,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:04:27,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2022-11-25 17:04:27,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:04:36,564 INFO L130 PetriNetUnfolder]: 3844/6822 cut-off events. [2022-11-25 17:04:36,564 INFO L131 PetriNetUnfolder]: For 270918/270918 co-relation queries the response was YES. [2022-11-25 17:04:36,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83261 conditions, 6822 events. 3844/6822 cut-off events. For 270918/270918 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 49297 event pairs, 523 based on Foata normal form. 120/6516 useless extension candidates. Maximal degree in co-relation 83135. Up to 3675 conditions per place. [2022-11-25 17:04:36,830 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 716 selfloop transitions, 707 changer transitions 0/1424 dead transitions. [2022-11-25 17:04:36,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1424 transitions, 36158 flow [2022-11-25 17:04:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 17:04:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-25 17:04:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4544 transitions. [2022-11-25 17:04:36,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36907082521117607 [2022-11-25 17:04:36,836 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4544 transitions. [2022-11-25 17:04:36,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4544 transitions. [2022-11-25 17:04:36,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:04:36,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4544 transitions. [2022-11-25 17:04:36,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 119.57894736842105) internal successors, (4544), 38 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:36,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 324.0) internal successors, (12636), 39 states have internal predecessors, (12636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:36,857 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 324.0) internal successors, (12636), 39 states have internal predecessors, (12636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:36,857 INFO L175 Difference]: Start difference. First operand has 357 places, 1179 transitions, 28610 flow. Second operand 38 states and 4544 transitions. [2022-11-25 17:04:36,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1424 transitions, 36158 flow [2022-11-25 17:04:40,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1424 transitions, 34487 flow, removed 823 selfloop flow, removed 8 redundant places. [2022-11-25 17:04:40,302 INFO L231 Difference]: Finished difference. Result has 393 places, 1315 transitions, 32491 flow [2022-11-25 17:04:40,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=26689, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=553, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=32491, PETRI_PLACES=393, PETRI_TRANSITIONS=1315} [2022-11-25 17:04:40,303 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 362 predicate places. [2022-11-25 17:04:40,303 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1315 transitions, 32491 flow [2022-11-25 17:04:40,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 115.32352941176471) internal successors, (3921), 34 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:40,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:04:40,304 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:40,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-25 17:04:40,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:40,505 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:04:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash -265254843, now seen corresponding path program 6 times [2022-11-25 17:04:40,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690102891] [2022-11-25 17:04:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:42,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:42,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690102891] [2022-11-25 17:04:42,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690102891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:42,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751296105] [2022-11-25 17:04:42,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:04:42,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:42,170 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:42,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-25 17:04:42,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:04:42,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:04:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:04:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:42,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:04:42,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:04:42,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:04:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:43,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:43,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:04:43,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-25 17:04:43,793 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:04:43,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 144 [2022-11-25 17:04:43,808 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-25 17:04:43,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 109 [2022-11-25 17:04:43,831 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-25 17:04:43,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 71 [2022-11-25 17:04:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:04:44,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751296105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:44,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:44,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2022-11-25 17:04:44,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650294898] [2022-11-25 17:04:44,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:44,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:04:44,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:44,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:04:44,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1071, Unknown=1, NotChecked=0, Total=1260 [2022-11-25 17:04:47,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:04:47,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1315 transitions, 32491 flow. Second operand has 36 states, 36 states have (on average 98.25) internal successors, (3537), 36 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:47,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:04:47,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:04:47,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:05:05,637 INFO L130 PetriNetUnfolder]: 5451/9454 cut-off events. [2022-11-25 17:05:05,637 INFO L131 PetriNetUnfolder]: For 366558/366558 co-relation queries the response was YES. [2022-11-25 17:05:05,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119167 conditions, 9454 events. 5451/9454 cut-off events. For 366558/366558 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 68309 event pairs, 532 based on Foata normal form. 251/8819 useless extension candidates. Maximal degree in co-relation 119033. Up to 4934 conditions per place. [2022-11-25 17:05:05,850 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1146 selfloop transitions, 929 changer transitions 69/2145 dead transitions. [2022-11-25 17:05:05,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 2145 transitions, 56358 flow [2022-11-25 17:05:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 17:05:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-25 17:05:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6984 transitions. [2022-11-25 17:05:05,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31699346405228757 [2022-11-25 17:05:05,858 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6984 transitions. [2022-11-25 17:05:05,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6984 transitions. [2022-11-25 17:05:05,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:05:05,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6984 transitions. [2022-11-25 17:05:05,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 102.70588235294117) internal successors, (6984), 68 states have internal predecessors, (6984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:05,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 324.0) internal successors, (22356), 69 states have internal predecessors, (22356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:05,879 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 324.0) internal successors, (22356), 69 states have internal predecessors, (22356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:05,880 INFO L175 Difference]: Start difference. First operand has 393 places, 1315 transitions, 32491 flow. Second operand 68 states and 6984 transitions. [2022-11-25 17:05:05,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 2145 transitions, 56358 flow [2022-11-25 17:05:11,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 2145 transitions, 49427 flow, removed 3349 selfloop flow, removed 13 redundant places. [2022-11-25 17:05:11,710 INFO L231 Difference]: Finished difference. Result has 466 places, 1852 transitions, 43584 flow [2022-11-25 17:05:11,712 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=29371, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=43584, PETRI_PLACES=466, PETRI_TRANSITIONS=1852} [2022-11-25 17:05:11,712 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 435 predicate places. [2022-11-25 17:05:11,712 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1852 transitions, 43584 flow [2022-11-25 17:05:11,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 98.25) internal successors, (3537), 36 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:11,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:05:11,714 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:11,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-25 17:05:11,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:11,927 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:05:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 751740519, now seen corresponding path program 9 times [2022-11-25 17:05:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:11,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674182026] [2022-11-25 17:05:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:11,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:13,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:13,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674182026] [2022-11-25 17:05:13,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674182026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:05:13,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580886535] [2022-11-25 17:05:13,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:05:13,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:13,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:13,646 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:13,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 17:05:13,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:05:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:05:13,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:05:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:05:14,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:05:14,753 INFO L321 Elim1Store]: treesize reduction 29, result has 76.0 percent of original size [2022-11-25 17:05:14,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 110 [2022-11-25 17:05:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:05:14,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580886535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:05:14,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:05:14,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 25 [2022-11-25 17:05:14,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208575489] [2022-11-25 17:05:14,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:05:14,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:05:14,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:14,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:05:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:05:17,828 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 324 [2022-11-25 17:05:17,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1852 transitions, 43584 flow. Second operand has 27 states, 27 states have (on average 117.29629629629629) internal successors, (3167), 27 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:17,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:05:17,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 324 [2022-11-25 17:05:17,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:05:33,020 INFO L130 PetriNetUnfolder]: 5976/10363 cut-off events. [2022-11-25 17:05:33,020 INFO L131 PetriNetUnfolder]: For 494244/494244 co-relation queries the response was YES. [2022-11-25 17:05:33,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128697 conditions, 10363 events. 5976/10363 cut-off events. For 494244/494244 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 76964 event pairs, 879 based on Foata normal form. 78/9539 useless extension candidates. Maximal degree in co-relation 128546. Up to 8390 conditions per place. [2022-11-25 17:05:33,337 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1733 selfloop transitions, 523 changer transitions 17/2274 dead transitions. [2022-11-25 17:05:33,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 2274 transitions, 56575 flow [2022-11-25 17:05:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-25 17:05:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-25 17:05:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 7767 transitions. [2022-11-25 17:05:33,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3745659722222222 [2022-11-25 17:05:33,348 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 7767 transitions. [2022-11-25 17:05:33,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 7767 transitions. [2022-11-25 17:05:33,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:05:33,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 7767 transitions. [2022-11-25 17:05:33,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 121.359375) internal successors, (7767), 64 states have internal predecessors, (7767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:33,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 324.0) internal successors, (21060), 65 states have internal predecessors, (21060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:33,380 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 324.0) internal successors, (21060), 65 states have internal predecessors, (21060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:33,381 INFO L175 Difference]: Start difference. First operand has 466 places, 1852 transitions, 43584 flow. Second operand 64 states and 7767 transitions. [2022-11-25 17:05:33,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 2274 transitions, 56575 flow [2022-11-25 17:05:40,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 2274 transitions, 52590 flow, removed 1901 selfloop flow, removed 22 redundant places. [2022-11-25 17:05:40,508 INFO L231 Difference]: Finished difference. Result has 525 places, 2053 transitions, 46589 flow [2022-11-25 17:05:40,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=40306, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=46589, PETRI_PLACES=525, PETRI_TRANSITIONS=2053} [2022-11-25 17:05:40,511 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 494 predicate places. [2022-11-25 17:05:40,511 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 2053 transitions, 46589 flow [2022-11-25 17:05:40,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 117.29629629629629) internal successors, (3167), 27 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:40,512 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:05:40,512 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:40,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 17:05:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-25 17:05:40,713 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:05:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:40,713 INFO L85 PathProgramCache]: Analyzing trace with hash 750787091, now seen corresponding path program 5 times [2022-11-25 17:05:40,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:40,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151793767] [2022-11-25 17:05:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:40,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:41,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:41,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151793767] [2022-11-25 17:05:41,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151793767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:05:41,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324592309] [2022-11-25 17:05:41,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:05:41,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:41,491 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:41,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 17:05:41,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:05:41,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:05:41,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-25 17:05:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:41,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:05:41,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 17:05:41,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:05:41,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:05:41,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:05:42,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:05:42,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:05:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:42,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:05:44,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:05:44,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 277 treesize of output 147 [2022-11-25 17:05:45,027 INFO L321 Elim1Store]: treesize reduction 36, result has 75.8 percent of original size [2022-11-25 17:05:45,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 385 treesize of output 436 [2022-11-25 17:05:45,096 INFO L321 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2022-11-25 17:05:45,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 319 treesize of output 267 [2022-11-25 17:05:45,158 INFO L321 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2022-11-25 17:05:45,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 185 treesize of output 173 [2022-11-25 17:05:48,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:05:48,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 320 treesize of output 162 [2022-11-25 17:05:48,505 INFO L321 Elim1Store]: treesize reduction 56, result has 62.4 percent of original size [2022-11-25 17:05:48,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 857 treesize of output 820 [2022-11-25 17:05:48,608 INFO L321 Elim1Store]: treesize reduction 28, result has 65.4 percent of original size [2022-11-25 17:05:48,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 723 treesize of output 591 [2022-11-25 17:05:48,702 INFO L321 Elim1Store]: treesize reduction 28, result has 65.4 percent of original size [2022-11-25 17:05:48,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 539 treesize of output 499 [2022-11-25 17:05:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:05:51,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324592309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:05:51,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:05:51,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2022-11-25 17:05:51,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057814711] [2022-11-25 17:05:51,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:05:51,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 17:05:51,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 17:05:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1141, Unknown=4, NotChecked=0, Total=1332 [2022-11-25 17:05:54,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:05:54,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 2053 transitions, 46589 flow. Second operand has 37 states, 37 states have (on average 98.21621621621621) internal successors, (3634), 37 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:05:54,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:05:54,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:05:54,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:06:24,646 INFO L130 PetriNetUnfolder]: 8549/14747 cut-off events. [2022-11-25 17:06:24,647 INFO L131 PetriNetUnfolder]: For 739072/739072 co-relation queries the response was YES. [2022-11-25 17:06:25,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179097 conditions, 14747 events. 8549/14747 cut-off events. For 739072/739072 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 114870 event pairs, 463 based on Foata normal form. 198/13753 useless extension candidates. Maximal degree in co-relation 178915. Up to 7727 conditions per place. [2022-11-25 17:06:25,181 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1411 selfloop transitions, 1837 changer transitions 7/3256 dead transitions. [2022-11-25 17:06:25,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 3256 transitions, 77532 flow [2022-11-25 17:06:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 17:06:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-25 17:06:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 5335 transitions. [2022-11-25 17:06:25,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3166547958214625 [2022-11-25 17:06:25,188 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 5335 transitions. [2022-11-25 17:06:25,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 5335 transitions. [2022-11-25 17:06:25,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:06:25,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 5335 transitions. [2022-11-25 17:06:25,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 102.59615384615384) internal successors, (5335), 52 states have internal predecessors, (5335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:25,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 324.0) internal successors, (17172), 53 states have internal predecessors, (17172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:25,213 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 324.0) internal successors, (17172), 53 states have internal predecessors, (17172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:25,213 INFO L175 Difference]: Start difference. First operand has 525 places, 2053 transitions, 46589 flow. Second operand 52 states and 5335 transitions. [2022-11-25 17:06:25,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 3256 transitions, 77532 flow [2022-11-25 17:06:36,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 3256 transitions, 76477 flow, removed 470 selfloop flow, removed 16 redundant places. [2022-11-25 17:06:36,970 INFO L231 Difference]: Finished difference. Result has 585 places, 3035 transitions, 74489 flow [2022-11-25 17:06:36,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=44626, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=971, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=74489, PETRI_PLACES=585, PETRI_TRANSITIONS=3035} [2022-11-25 17:06:36,971 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 554 predicate places. [2022-11-25 17:06:36,972 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 3035 transitions, 74489 flow [2022-11-25 17:06:36,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 98.21621621621621) internal successors, (3634), 37 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:36,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:06:36,972 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:36,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:37,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-25 17:06:37,173 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:06:37,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash 750785231, now seen corresponding path program 6 times [2022-11-25 17:06:37,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:37,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501786362] [2022-11-25 17:06:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:37,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:37,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501786362] [2022-11-25 17:06:37,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501786362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:06:37,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156060263] [2022-11-25 17:06:37,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:06:37,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:37,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:37,751 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:37,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-25 17:06:37,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:06:37,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:06:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:06:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:38,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:06:38,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:06:38,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:06:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:38,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:06:39,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:06:39,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-25 17:06:39,314 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:06:39,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 299 [2022-11-25 17:06:39,330 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-25 17:06:39,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 238 [2022-11-25 17:06:39,347 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-25 17:06:39,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 158 [2022-11-25 17:06:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:06:39,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156060263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:06:39,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:06:39,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-11-25 17:06:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513512823] [2022-11-25 17:06:39,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:06:39,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:06:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:06:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=942, Unknown=1, NotChecked=0, Total=1122 [2022-11-25 17:06:41,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:06:41,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 3035 transitions, 74489 flow. Second operand has 34 states, 34 states have (on average 98.32352941176471) internal successors, (3343), 34 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:41,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:06:41,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:06:41,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:06:58,211 INFO L130 PetriNetUnfolder]: 4592/8259 cut-off events. [2022-11-25 17:06:58,211 INFO L131 PetriNetUnfolder]: For 496714/496714 co-relation queries the response was YES. [2022-11-25 17:06:58,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107909 conditions, 8259 events. 4592/8259 cut-off events. For 496714/496714 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 61990 event pairs, 740 based on Foata normal form. 350/8263 useless extension candidates. Maximal degree in co-relation 107701. Up to 4249 conditions per place. [2022-11-25 17:06:58,425 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 1387 selfloop transitions, 248 changer transitions 24/1660 dead transitions. [2022-11-25 17:06:58,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1660 transitions, 45921 flow [2022-11-25 17:06:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:06:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 17:06:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3484 transitions. [2022-11-25 17:06:58,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31626724763979663 [2022-11-25 17:06:58,431 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3484 transitions. [2022-11-25 17:06:58,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3484 transitions. [2022-11-25 17:06:58,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:06:58,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3484 transitions. [2022-11-25 17:06:58,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 102.47058823529412) internal successors, (3484), 34 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:58,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 324.0) internal successors, (11340), 35 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:58,449 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 324.0) internal successors, (11340), 35 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:06:58,449 INFO L175 Difference]: Start difference. First operand has 585 places, 3035 transitions, 74489 flow. Second operand 34 states and 3484 transitions. [2022-11-25 17:06:58,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1660 transitions, 45921 flow [2022-11-25 17:07:05,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1660 transitions, 42674 flow, removed 1494 selfloop flow, removed 49 redundant places. [2022-11-25 17:07:05,857 INFO L231 Difference]: Finished difference. Result has 537 places, 1544 transitions, 38720 flow [2022-11-25 17:07:05,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=37090, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=38720, PETRI_PLACES=537, PETRI_TRANSITIONS=1544} [2022-11-25 17:07:05,859 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 506 predicate places. [2022-11-25 17:07:05,859 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1544 transitions, 38720 flow [2022-11-25 17:07:05,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 98.32352941176471) internal successors, (3343), 34 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:05,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:05,860 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:05,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-25 17:07:06,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-25 17:07:06,060 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:07:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash 660329275, now seen corresponding path program 10 times [2022-11-25 17:07:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:06,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329067811] [2022-11-25 17:07:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:06,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:07,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:07,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329067811] [2022-11-25 17:07:07,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329067811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:07,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921535638] [2022-11-25 17:07:07,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:07:07,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:07,398 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:07,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-25 17:07:07,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:07:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:07:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 17:07:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:08,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:08,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:07:08,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 140 [2022-11-25 17:07:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:09,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921535638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:09,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:09,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2022-11-25 17:07:09,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061184333] [2022-11-25 17:07:09,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:09,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:07:09,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:09,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:07:09,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 17:07:12,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2022-11-25 17:07:12,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1544 transitions, 38720 flow. Second operand has 36 states, 36 states have (on average 115.25) internal successors, (4149), 36 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:12,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:12,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2022-11-25 17:07:12,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:23,435 INFO L130 PetriNetUnfolder]: 4702/8507 cut-off events. [2022-11-25 17:07:23,435 INFO L131 PetriNetUnfolder]: For 385695/385695 co-relation queries the response was YES. [2022-11-25 17:07:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103799 conditions, 8507 events. 4702/8507 cut-off events. For 385695/385695 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 63785 event pairs, 555 based on Foata normal form. 134/8375 useless extension candidates. Maximal degree in co-relation 103601. Up to 7540 conditions per place. [2022-11-25 17:07:23,680 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1401 selfloop transitions, 269 changer transitions 1/1672 dead transitions. [2022-11-25 17:07:23,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 1672 transitions, 44754 flow [2022-11-25 17:07:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:07:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:07:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2969 transitions. [2022-11-25 17:07:23,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3665432098765432 [2022-11-25 17:07:23,686 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2969 transitions. [2022-11-25 17:07:23,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2969 transitions. [2022-11-25 17:07:23,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:23,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2969 transitions. [2022-11-25 17:07:23,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 118.76) internal successors, (2969), 25 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:23,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:23,704 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:23,704 INFO L175 Difference]: Start difference. First operand has 537 places, 1544 transitions, 38720 flow. Second operand 25 states and 2969 transitions. [2022-11-25 17:07:23,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 1672 transitions, 44754 flow [2022-11-25 17:07:30,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 1672 transitions, 44286 flow, removed 192 selfloop flow, removed 13 redundant places. [2022-11-25 17:07:30,128 INFO L231 Difference]: Finished difference. Result has 552 places, 1592 transitions, 40656 flow [2022-11-25 17:07:30,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=37795, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=40656, PETRI_PLACES=552, PETRI_TRANSITIONS=1592} [2022-11-25 17:07:30,130 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 521 predicate places. [2022-11-25 17:07:30,130 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 1592 transitions, 40656 flow [2022-11-25 17:07:30,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 115.25) internal successors, (4149), 36 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:30,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:30,131 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:30,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:30,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:30,331 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:07:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1226115005, now seen corresponding path program 6 times [2022-11-25 17:07:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:30,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461424224] [2022-11-25 17:07:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:30,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:31,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:31,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461424224] [2022-11-25 17:07:31,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461424224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:31,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840281275] [2022-11-25 17:07:31,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:07:31,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:31,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:31,224 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:31,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-25 17:07:31,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:07:31,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:07:31,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:07:31,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:31,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:07:31,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:07:31,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:07:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:32,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:32,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:07:32,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2022-11-25 17:07:32,844 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-25 17:07:32,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 136 [2022-11-25 17:07:32,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:07:32,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 86 [2022-11-25 17:07:32,874 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-25 17:07:32,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 88 [2022-11-25 17:07:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:33,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840281275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:33,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:33,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-25 17:07:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129863695] [2022-11-25 17:07:33,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:33,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:07:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:07:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1002, Unknown=1, NotChecked=0, Total=1190 [2022-11-25 17:07:35,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:07:37,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:07:40,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:07:42,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:07:42,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-11-25 17:07:42,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1592 transitions, 40656 flow. Second operand has 35 states, 35 states have (on average 98.28571428571429) internal successors, (3440), 35 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:42,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:42,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-11-25 17:07:42,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:59,079 INFO L130 PetriNetUnfolder]: 4623/8358 cut-off events. [2022-11-25 17:07:59,079 INFO L131 PetriNetUnfolder]: For 365975/365975 co-relation queries the response was YES. [2022-11-25 17:07:59,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102329 conditions, 8358 events. 4623/8358 cut-off events. For 365975/365975 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 63037 event pairs, 779 based on Foata normal form. 56/8158 useless extension candidates. Maximal degree in co-relation 102125. Up to 4336 conditions per place. [2022-11-25 17:07:59,305 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1397 selfloop transitions, 268 changer transitions 6/1672 dead transitions. [2022-11-25 17:07:59,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 1672 transitions, 44576 flow [2022-11-25 17:07:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:07:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 17:07:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3764 transitions. [2022-11-25 17:07:59,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3139806473139806 [2022-11-25 17:07:59,310 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3764 transitions. [2022-11-25 17:07:59,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3764 transitions. [2022-11-25 17:07:59,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:59,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3764 transitions. [2022-11-25 17:07:59,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 101.72972972972973) internal successors, (3764), 37 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:59,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 324.0) internal successors, (12312), 38 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:59,329 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 324.0) internal successors, (12312), 38 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:59,329 INFO L175 Difference]: Start difference. First operand has 552 places, 1592 transitions, 40656 flow. Second operand 37 states and 3764 transitions. [2022-11-25 17:07:59,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 1672 transitions, 44576 flow [2022-11-25 17:08:05,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1672 transitions, 44204 flow, removed 91 selfloop flow, removed 13 redundant places. [2022-11-25 17:08:05,566 INFO L231 Difference]: Finished difference. Result has 578 places, 1578 transitions, 40507 flow [2022-11-25 17:08:05,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=39451, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=40507, PETRI_PLACES=578, PETRI_TRANSITIONS=1578} [2022-11-25 17:08:05,568 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 547 predicate places. [2022-11-25 17:08:05,568 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 1578 transitions, 40507 flow [2022-11-25 17:08:05,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 98.28571428571429) internal successors, (3440), 35 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:05,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:05,569 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:05,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-25 17:08:05,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:05,770 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:08:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash 659376955, now seen corresponding path program 11 times [2022-11-25 17:08:05,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:05,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294247520] [2022-11-25 17:08:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:05,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:06,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:06,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294247520] [2022-11-25 17:08:06,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294247520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:08:06,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367120667] [2022-11-25 17:08:06,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:08:06,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:06,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:08:06,965 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:08:06,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-25 17:08:07,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:08:07,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:08:07,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:08:07,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:08:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:08:07,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:08:07,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:08:07,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 140 [2022-11-25 17:08:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:08:08,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367120667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:08:08,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:08:08,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 26 [2022-11-25 17:08:08,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011813852] [2022-11-25 17:08:08,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:08:08,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:08:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:08:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:08:11,730 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-11-25 17:08:11,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 1578 transitions, 40507 flow. Second operand has 28 states, 28 states have (on average 122.35714285714286) internal successors, (3426), 28 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:11,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:11,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-11-25 17:08:11,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:25,303 INFO L130 PetriNetUnfolder]: 5280/9429 cut-off events. [2022-11-25 17:08:25,303 INFO L131 PetriNetUnfolder]: For 434217/434217 co-relation queries the response was YES. [2022-11-25 17:08:25,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117796 conditions, 9429 events. 5280/9429 cut-off events. For 434217/434217 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 71335 event pairs, 760 based on Foata normal form. 82/9207 useless extension candidates. Maximal degree in co-relation 117590. Up to 6983 conditions per place. [2022-11-25 17:08:25,581 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1248 selfloop transitions, 678 changer transitions 12/1939 dead transitions. [2022-11-25 17:08:25,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1939 transitions, 52961 flow [2022-11-25 17:08:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 17:08:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-25 17:08:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 5398 transitions. [2022-11-25 17:08:25,587 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3874533448176859 [2022-11-25 17:08:25,587 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 5398 transitions. [2022-11-25 17:08:25,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 5398 transitions. [2022-11-25 17:08:25,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:25,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 5398 transitions. [2022-11-25 17:08:25,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 125.53488372093024) internal successors, (5398), 43 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:25,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 324.0) internal successors, (14256), 44 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:25,601 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 324.0) internal successors, (14256), 44 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:25,601 INFO L175 Difference]: Start difference. First operand has 578 places, 1578 transitions, 40507 flow. Second operand 43 states and 5398 transitions. [2022-11-25 17:08:25,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1939 transitions, 52961 flow [2022-11-25 17:08:32,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1939 transitions, 52643 flow, removed 53 selfloop flow, removed 18 redundant places. [2022-11-25 17:08:32,841 INFO L231 Difference]: Finished difference. Result has 612 places, 1807 transitions, 49015 flow [2022-11-25 17:08:32,842 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=39982, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=989, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=49015, PETRI_PLACES=612, PETRI_TRANSITIONS=1807} [2022-11-25 17:08:32,842 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 581 predicate places. [2022-11-25 17:08:32,842 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 1807 transitions, 49015 flow [2022-11-25 17:08:32,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 122.35714285714286) internal successors, (3426), 28 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:32,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:32,843 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:32,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-25 17:08:33,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-25 17:08:33,044 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-25 17:08:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:33,044 INFO L85 PathProgramCache]: Analyzing trace with hash 659376901, now seen corresponding path program 7 times [2022-11-25 17:08:33,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:33,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040753139] [2022-11-25 17:08:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:33,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:33,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040753139] [2022-11-25 17:08:33,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040753139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:08:33,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832339882] [2022-11-25 17:08:33,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:08:33,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:08:33,797 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:08:33,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d317a4-0ec0-499d-b2e1-b1b4ab6c7279/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-25 17:08:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:34,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:08:34,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:08:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:08:34,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:08:34,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:08:34,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-11-25 17:08:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:08:34,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832339882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:08:34,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:08:34,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 19 [2022-11-25 17:08:34,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262051133] [2022-11-25 17:08:34,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:08:34,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:08:34,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:34,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:08:34,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:08:35,469 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-11-25 17:08:35,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1807 transitions, 49015 flow. Second operand has 21 states, 21 states have (on average 122.61904761904762) internal successors, (2575), 21 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:35,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:35,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-11-25 17:08:35,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand