./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/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_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/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_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --- 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 17:46:51,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:46:51,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:46:51,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:46:51,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:46:51,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:46:51,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:46:51,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:46:51,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:46:51,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:46:51,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:46:51,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:46:51,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:46:51,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:46:51,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:46:51,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:46:51,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:46:51,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:46:51,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:46:51,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:46:51,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:46:51,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:46:51,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:46:51,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:46:51,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:46:51,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:46:51,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:46:51,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:46:51,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:46:51,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:46:51,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:46:51,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:46:51,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:46:51,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:46:51,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:46:51,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:46:51,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:46:51,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:46:51,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:46:51,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:46:51,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:46:51,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 17:46:51,808 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:46:51,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:46:51,813 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:46:51,813 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:46:51,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:46:51,814 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:46:51,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:46:51,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:46:51,816 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:46:51,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:46:51,817 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:46:51,817 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:46:51,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:46:51,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:46:51,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:46:51,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:46:51,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:46:51,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:46:51,819 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 17:46:51,819 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:46:51,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:46:51,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:46:51,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:46:51,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:46:51,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:46:51,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:46:51,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:46:51,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:46:51,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:46:51,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:46:51,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:46:51,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:46:51,824 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:46:51,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:46:51,824 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:46:51,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:46:51,825 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_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 [2022-11-25 17:46:52,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:46:52,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:46:52,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:46:52,160 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:46:52,161 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:46:52,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-25 17:46:55,248 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:46:55,514 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:46:55,515 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-25 17:46:55,523 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/data/89a1fa69e/5481a7e5528c48d2b65573c92bbb7b47/FLAG4a85ecd39 [2022-11-25 17:46:55,541 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/data/89a1fa69e/5481a7e5528c48d2b65573c92bbb7b47 [2022-11-25 17:46:55,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:46:55,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:46:55,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:46:55,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:46:55,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:46:55,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:46:55" (1/1) ... [2022-11-25 17:46:55,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7fe879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:55, skipping insertion in model container [2022-11-25 17:46:55,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:46:55" (1/1) ... [2022-11-25 17:46:55,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:46:55,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:46:55,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,872 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,874 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,879 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,881 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,881 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,902 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,910 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_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-25 17:46:55,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:46:55,940 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:46:55,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,966 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,967 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,976 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:46:55,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:46:55,992 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_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-25 17:46:56,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:46:56,021 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:46:56,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56 WrapperNode [2022-11-25 17:46:56,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:46:56,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:46:56,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:46:56,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:46:56,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,096 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 271 [2022-11-25 17:46:56,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:46:56,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:46:56,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:46:56,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:46:56,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,138 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:46:56,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:46:56,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:46:56,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:46:56,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (1/1) ... [2022-11-25 17:46:56,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:46:56,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:56,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:46:56,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:46:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:46:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:46:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:46:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:46:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:46:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:46:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:46:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:46:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:46:56,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:46:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:46:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:46:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:46:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:46:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:46:56,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:46:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:46:56,250 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 17:46:56,390 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:46:56,392 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:46:57,005 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:46:57,194 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:46:57,194 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 17:46:57,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:46:57 BoogieIcfgContainer [2022-11-25 17:46:57,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:46:57,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:46:57,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:46:57,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:46:57,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:46:55" (1/3) ... [2022-11-25 17:46:57,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278b1e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:46:57, skipping insertion in model container [2022-11-25 17:46:57,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:56" (2/3) ... [2022-11-25 17:46:57,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278b1e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:46:57, skipping insertion in model container [2022-11-25 17:46:57,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:46:57" (3/3) ... [2022-11-25 17:46:57,205 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2022-11-25 17:46:57,214 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:46:57,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:46:57,226 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-25 17:46:57,226 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:46:57,361 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:46:57,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 250 transitions, 524 flow [2022-11-25 17:46:57,573 INFO L130 PetriNetUnfolder]: 18/247 cut-off events. [2022-11-25 17:46:57,574 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:46:57,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 247 events. 18/247 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 196. Up to 3 conditions per place. [2022-11-25 17:46:57,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 250 transitions, 524 flow [2022-11-25 17:46:57,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 227 transitions, 472 flow [2022-11-25 17:46:57,591 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:46:57,606 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 227 transitions, 472 flow [2022-11-25 17:46:57,609 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 227 transitions, 472 flow [2022-11-25 17:46:57,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 227 transitions, 472 flow [2022-11-25 17:46:57,666 INFO L130 PetriNetUnfolder]: 17/227 cut-off events. [2022-11-25 17:46:57,666 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:46:57,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 227 events. 17/227 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 222 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 196. Up to 3 conditions per place. [2022-11-25 17:46:57,671 INFO L119 LiptonReduction]: Number of co-enabled transitions 3440 [2022-11-25 17:47:09,383 INFO L134 LiptonReduction]: Checked pairs total: 7249 [2022-11-25 17:47:09,383 INFO L136 LiptonReduction]: Total number of compositions: 238 [2022-11-25 17:47:09,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:09,407 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;@101c1b8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:09,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-25 17:47:09,411 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:47:09,411 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:09,412 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:09,412 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:09,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:09,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:09,418 INFO L85 PathProgramCache]: Analyzing trace with hash 36845, now seen corresponding path program 1 times [2022-11-25 17:47:09,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:09,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842116013] [2022-11-25 17:47:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:09,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:09,778 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 17:47:09,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:09,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842116013] [2022-11-25 17:47:09,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842116013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:09,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:09,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:09,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803667476] [2022-11-25 17:47:09,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:09,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:09,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:09,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:09,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 488 [2022-11-25 17:47:09,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:09,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:09,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 488 [2022-11-25 17:47:09,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:11,708 INFO L130 PetriNetUnfolder]: 7761/10033 cut-off events. [2022-11-25 17:47:11,708 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2022-11-25 17:47:11,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20459 conditions, 10033 events. 7761/10033 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 50489 event pairs, 4234 based on Foata normal form. 0/3169 useless extension candidates. Maximal degree in co-relation 9165. Up to 4991 conditions per place. [2022-11-25 17:47:11,785 INFO L137 encePairwiseOnDemand]: 474/488 looper letters, 79 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2022-11-25 17:47:11,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 86 transitions, 374 flow [2022-11-25 17:47:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2022-11-25 17:47:11,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4918032786885246 [2022-11-25 17:47:11,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2022-11-25 17:47:11,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2022-11-25 17:47:11,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:11,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2022-11-25 17:47:11,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:11,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:11,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:11,827 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 720 transitions. [2022-11-25 17:47:11,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 86 transitions, 374 flow [2022-11-25 17:47:11,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 86 transitions, 350 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:47:11,861 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 136 flow [2022-11-25 17:47:11,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2022-11-25 17:47:11,866 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2022-11-25 17:47:11,867 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 136 flow [2022-11-25 17:47:11,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:11,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:11,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:47:11,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:47:11,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1144072, now seen corresponding path program 1 times [2022-11-25 17:47:11,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:11,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626539722] [2022-11-25 17:47:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:11,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:11,944 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 17:47:11,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626539722] [2022-11-25 17:47:11,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626539722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:11,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:11,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:11,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336497912] [2022-11-25 17:47:11,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:11,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:11,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:11,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:11,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:11,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 488 [2022-11-25 17:47:11,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:11,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:11,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 488 [2022-11-25 17:47:11,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:13,484 INFO L130 PetriNetUnfolder]: 7761/10031 cut-off events. [2022-11-25 17:47:13,484 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-11-25 17:47:13,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20177 conditions, 10031 events. 7761/10031 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 50382 event pairs, 4234 based on Foata normal form. 0/3145 useless extension candidates. Maximal degree in co-relation 10077. Up to 9973 conditions per place. [2022-11-25 17:47:13,548 INFO L137 encePairwiseOnDemand]: 485/488 looper letters, 44 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2022-11-25 17:47:13,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 218 flow [2022-11-25 17:47:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2022-11-25 17:47:13,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4542349726775956 [2022-11-25 17:47:13,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2022-11-25 17:47:13,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2022-11-25 17:47:13,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:13,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2022-11-25 17:47:13,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:13,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:13,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:13,560 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 136 flow. Second operand 3 states and 665 transitions. [2022-11-25 17:47:13,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 218 flow [2022-11-25 17:47:13,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:13,562 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 122 flow [2022-11-25 17:47:13,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2022-11-25 17:47:13,563 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2022-11-25 17:47:13,564 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 122 flow [2022-11-25 17:47:13,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:13,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:13,565 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:47:13,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:47:13,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1144071, now seen corresponding path program 1 times [2022-11-25 17:47:13,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:13,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944066179] [2022-11-25 17:47:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:13,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:13,692 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 17:47:13,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944066179] [2022-11-25 17:47:13,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944066179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:13,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739494821] [2022-11-25 17:47:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:13,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:13,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:13,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:47:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:13,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:47:13,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:13,916 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 17:47:13,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:13,934 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 17:47:13,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739494821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:13,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:13,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 17:47:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137240338] [2022-11-25 17:47:13,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:13,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:47:13,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:47:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:47:14,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 488 [2022-11-25 17:47:14,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 208.14285714285714) internal successors, (1457), 7 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:14,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:14,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 488 [2022-11-25 17:47:14,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:17,606 INFO L130 PetriNetUnfolder]: 19401/25073 cut-off events. [2022-11-25 17:47:17,606 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-11-25 17:47:17,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50414 conditions, 25073 events. 19401/25073 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 2003. Compared 139419 event pairs, 10585 based on Foata normal form. 0/7968 useless extension candidates. Maximal degree in co-relation 50406. Up to 4989 conditions per place. [2022-11-25 17:47:17,737 INFO L137 encePairwiseOnDemand]: 482/488 looper letters, 185 selfloop transitions, 13 changer transitions 0/201 dead transitions. [2022-11-25 17:47:17,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 201 transitions, 866 flow [2022-11-25 17:47:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:47:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:47:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1446 transitions. [2022-11-25 17:47:17,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49385245901639346 [2022-11-25 17:47:17,742 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1446 transitions. [2022-11-25 17:47:17,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1446 transitions. [2022-11-25 17:47:17,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:17,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1446 transitions. [2022-11-25 17:47:17,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 241.0) internal successors, (1446), 6 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:17,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:17,755 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:17,760 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 122 flow. Second operand 6 states and 1446 transitions. [2022-11-25 17:47:17,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 201 transitions, 866 flow [2022-11-25 17:47:17,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 201 transitions, 865 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:17,768 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 214 flow [2022-11-25 17:47:17,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2022-11-25 17:47:17,771 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-11-25 17:47:17,771 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 214 flow [2022-11-25 17:47:17,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 208.14285714285714) internal successors, (1457), 7 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:17,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:17,773 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:47:17,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:17,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:17,988 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:17,989 INFO L85 PathProgramCache]: Analyzing trace with hash -274825556, now seen corresponding path program 2 times [2022-11-25 17:47:17,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:17,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236005074] [2022-11-25 17:47:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:17,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:18,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236005074] [2022-11-25 17:47:18,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236005074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797342249] [2022-11-25 17:47:18,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:47:18,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:18,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:18,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:18,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:47:18,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:47:18,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:47:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:47:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:18,299 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 17:47:18,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:18,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797342249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:18,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:18,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-25 17:47:18,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020440104] [2022-11-25 17:47:18,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:18,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:18,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:47:18,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 488 [2022-11-25 17:47:18,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:18,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:18,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 488 [2022-11-25 17:47:18,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:21,625 INFO L130 PetriNetUnfolder]: 19401/25071 cut-off events. [2022-11-25 17:47:21,625 INFO L131 PetriNetUnfolder]: For 228/228 co-relation queries the response was YES. [2022-11-25 17:47:21,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50435 conditions, 25071 events. 19401/25071 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 2007. Compared 139263 event pairs, 10585 based on Foata normal form. 2/7861 useless extension candidates. Maximal degree in co-relation 50423. Up to 24926 conditions per place. [2022-11-25 17:47:21,764 INFO L137 encePairwiseOnDemand]: 485/488 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2022-11-25 17:47:21,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 298 flow [2022-11-25 17:47:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2022-11-25 17:47:21,768 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4569672131147541 [2022-11-25 17:47:21,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2022-11-25 17:47:21,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2022-11-25 17:47:21,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:21,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2022-11-25 17:47:21,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,775 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 214 flow. Second operand 3 states and 669 transitions. [2022-11-25 17:47:21,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 298 flow [2022-11-25 17:47:21,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 253 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-11-25 17:47:21,777 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 151 flow [2022-11-25 17:47:21,778 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2022-11-25 17:47:21,779 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2022-11-25 17:47:21,779 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 151 flow [2022-11-25 17:47:21,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:21,780 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:47:21,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 17:47:21,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:21,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:21,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:21,986 INFO L85 PathProgramCache]: Analyzing trace with hash -254220648, now seen corresponding path program 1 times [2022-11-25 17:47:21,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:21,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916016424] [2022-11-25 17:47:21,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:21,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:22,074 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 17:47:22,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916016424] [2022-11-25 17:47:22,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916016424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:22,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:22,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270028536] [2022-11-25 17:47:22,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:22,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:22,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:22,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:22,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:22,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 488 [2022-11-25 17:47:22,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:22,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:22,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 488 [2022-11-25 17:47:22,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:26,390 INFO L130 PetriNetUnfolder]: 26511/35706 cut-off events. [2022-11-25 17:47:26,390 INFO L131 PetriNetUnfolder]: For 225/225 co-relation queries the response was YES. [2022-11-25 17:47:26,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71929 conditions, 35706 events. 26511/35706 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 2968. Compared 230810 event pairs, 10675 based on Foata normal form. 0/12946 useless extension candidates. Maximal degree in co-relation 71920. Up to 21607 conditions per place. [2022-11-25 17:47:26,546 INFO L137 encePairwiseOnDemand]: 484/488 looper letters, 83 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2022-11-25 17:47:26,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 87 transitions, 390 flow [2022-11-25 17:47:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2022-11-25 17:47:26,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48360655737704916 [2022-11-25 17:47:26,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2022-11-25 17:47:26,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2022-11-25 17:47:26,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:26,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2022-11-25 17:47:26,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,568 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 151 flow. Second operand 3 states and 708 transitions. [2022-11-25 17:47:26,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 87 transitions, 390 flow [2022-11-25 17:47:26,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:26,572 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 164 flow [2022-11-25 17:47:26,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2022-11-25 17:47:26,575 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2022-11-25 17:47:26,575 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 164 flow [2022-11-25 17:47:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:26,576 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:47:26,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:47:26,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -254220807, now seen corresponding path program 1 times [2022-11-25 17:47:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:26,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38184073] [2022-11-25 17:47:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:26,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:26,710 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 17:47:26,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38184073] [2022-11-25 17:47:26,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38184073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:26,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:26,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:26,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333199541] [2022-11-25 17:47:26,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:26,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:26,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:26,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 488 [2022-11-25 17:47:26,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:26,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 488 [2022-11-25 17:47:26,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:30,691 INFO L130 PetriNetUnfolder]: 23901/32491 cut-off events. [2022-11-25 17:47:30,691 INFO L131 PetriNetUnfolder]: For 1545/2295 co-relation queries the response was YES. [2022-11-25 17:47:30,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68830 conditions, 32491 events. 23901/32491 cut-off events. For 1545/2295 co-relation queries the response was YES. Maximal size of possible extension queue 2786. Compared 209721 event pairs, 16075 based on Foata normal form. 950/13871 useless extension candidates. Maximal degree in co-relation 68820. Up to 32145 conditions per place. [2022-11-25 17:47:30,839 INFO L137 encePairwiseOnDemand]: 479/488 looper letters, 66 selfloop transitions, 3 changer transitions 1/73 dead transitions. [2022-11-25 17:47:30,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 351 flow [2022-11-25 17:47:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:47:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:47:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 873 transitions. [2022-11-25 17:47:30,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44723360655737704 [2022-11-25 17:47:30,843 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 873 transitions. [2022-11-25 17:47:30,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 873 transitions. [2022-11-25 17:47:30,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:30,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 873 transitions. [2022-11-25 17:47:30,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,851 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,851 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 164 flow. Second operand 4 states and 873 transitions. [2022-11-25 17:47:30,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 351 flow [2022-11-25 17:47:30,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:30,854 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 181 flow [2022-11-25 17:47:30,854 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2022-11-25 17:47:30,855 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-11-25 17:47:30,855 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 181 flow [2022-11-25 17:47:30,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:30,856 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:30,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:47:30,857 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash 90949012, now seen corresponding path program 1 times [2022-11-25 17:47:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:30,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169602663] [2022-11-25 17:47:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:30,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:30,988 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 17:47:30,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:30,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169602663] [2022-11-25 17:47:30,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169602663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362770452] [2022-11-25 17:47:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:30,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:30,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:30,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:31,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:47:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:31,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:47:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:31,140 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 17:47:31,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:31,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362770452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:31,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:31,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-25 17:47:31,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306556884] [2022-11-25 17:47:31,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:31,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:31,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:31,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:31,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:47:31,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 488 [2022-11-25 17:47:31,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:31,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:31,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 488 [2022-11-25 17:47:31,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:33,114 INFO L130 PetriNetUnfolder]: 14076/19286 cut-off events. [2022-11-25 17:47:33,115 INFO L131 PetriNetUnfolder]: For 4790/5470 co-relation queries the response was YES. [2022-11-25 17:47:33,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44279 conditions, 19286 events. 14076/19286 cut-off events. For 4790/5470 co-relation queries the response was YES. Maximal size of possible extension queue 1572. Compared 119275 event pairs, 9335 based on Foata normal form. 680/9652 useless extension candidates. Maximal degree in co-relation 44267. Up to 19211 conditions per place. [2022-11-25 17:47:33,214 INFO L137 encePairwiseOnDemand]: 484/488 looper letters, 49 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-11-25 17:47:33,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 269 flow [2022-11-25 17:47:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2022-11-25 17:47:33,217 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45969945355191255 [2022-11-25 17:47:33,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2022-11-25 17:47:33,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2022-11-25 17:47:33,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:33,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2022-11-25 17:47:33,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:33,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:33,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:33,223 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 181 flow. Second operand 3 states and 673 transitions. [2022-11-25 17:47:33,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 269 flow [2022-11-25 17:47:33,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 263 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:33,225 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 165 flow [2022-11-25 17:47:33,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2022-11-25 17:47:33,226 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2022-11-25 17:47:33,227 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 165 flow [2022-11-25 17:47:33,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:33,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:33,227 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:33,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:33,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:47:33,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:33,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1475541880, now seen corresponding path program 1 times [2022-11-25 17:47:33,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:33,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189642707] [2022-11-25 17:47:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:33,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:33,509 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 17:47:33,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:33,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189642707] [2022-11-25 17:47:33,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189642707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738123115] [2022-11-25 17:47:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:33,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:33,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:33,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:33,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:47:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:33,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:47:33,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:33,712 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 17:47:33,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:33,778 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 17:47:33,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738123115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:33,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:33,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2022-11-25 17:47:33,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818846495] [2022-11-25 17:47:33,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:33,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:47:33,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:33,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:47:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:47:34,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 488 [2022-11-25 17:47:34,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 165 flow. Second operand has 11 states, 11 states have (on average 196.9090909090909) internal successors, (2166), 11 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:34,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:34,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 488 [2022-11-25 17:47:34,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:39,113 INFO L130 PetriNetUnfolder]: 29651/40676 cut-off events. [2022-11-25 17:47:39,113 INFO L131 PetriNetUnfolder]: For 7265/7265 co-relation queries the response was YES. [2022-11-25 17:47:39,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92212 conditions, 40676 events. 29651/40676 cut-off events. For 7265/7265 co-relation queries the response was YES. Maximal size of possible extension queue 2717. Compared 273407 event pairs, 6280 based on Foata normal form. 2400/21681 useless extension candidates. Maximal degree in co-relation 92199. Up to 12083 conditions per place. [2022-11-25 17:47:39,297 INFO L137 encePairwiseOnDemand]: 478/488 looper letters, 251 selfloop transitions, 20 changer transitions 6/279 dead transitions. [2022-11-25 17:47:39,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 279 transitions, 1267 flow [2022-11-25 17:47:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:47:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:47:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3585 transitions. [2022-11-25 17:47:39,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43213596914175506 [2022-11-25 17:47:39,308 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3585 transitions. [2022-11-25 17:47:39,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3585 transitions. [2022-11-25 17:47:39,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:39,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3585 transitions. [2022-11-25 17:47:39,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 210.88235294117646) internal successors, (3585), 17 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:39,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 488.0) internal successors, (8784), 18 states have internal predecessors, (8784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:39,335 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 488.0) internal successors, (8784), 18 states have internal predecessors, (8784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:39,336 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 165 flow. Second operand 17 states and 3585 transitions. [2022-11-25 17:47:39,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 279 transitions, 1267 flow [2022-11-25 17:47:39,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 279 transitions, 1266 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:39,348 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 309 flow [2022-11-25 17:47:39,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=309, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2022-11-25 17:47:39,350 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2022-11-25 17:47:39,350 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 309 flow [2022-11-25 17:47:39,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 196.9090909090909) internal successors, (2166), 11 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:39,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:39,352 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:39,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:39,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd529cdb-9056-4ae7-ba8a-6aed3a48c922/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:39,558 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1989753041, now seen corresponding path program 1 times [2022-11-25 17:47:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:39,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231617536] [2022-11-25 17:47:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:39,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:47:39,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:39,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231617536] [2022-11-25 17:47:39,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231617536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:39,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:39,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:39,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839608481] [2022-11-25 17:47:39,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:39,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:39,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:39,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:39,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 488 [2022-11-25 17:47:39,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:39,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:39,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 488 [2022-11-25 17:47:39,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:44,197 INFO L130 PetriNetUnfolder]: 27201/37586 cut-off events. [2022-11-25 17:47:44,197 INFO L131 PetriNetUnfolder]: For 49309/49339 co-relation queries the response was YES. [2022-11-25 17:47:44,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101568 conditions, 37586 events. 27201/37586 cut-off events. For 49309/49339 co-relation queries the response was YES. Maximal size of possible extension queue 2462. Compared 253075 event pairs, 6880 based on Foata normal form. 1300/19828 useless extension candidates. Maximal degree in co-relation 101546. Up to 33780 conditions per place. [2022-11-25 17:47:44,570 INFO L137 encePairwiseOnDemand]: 486/488 looper letters, 74 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2022-11-25 17:47:44,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 82 transitions, 497 flow [2022-11-25 17:47:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 689 transitions. [2022-11-25 17:47:44,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47062841530054644 [2022-11-25 17:47:44,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 689 transitions. [2022-11-25 17:47:44,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 689 transitions. [2022-11-25 17:47:44,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:44,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 689 transitions. [2022-11-25 17:47:44,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,579 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 309 flow. Second operand 3 states and 689 transitions. [2022-11-25 17:47:44,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 82 transitions, 497 flow [2022-11-25 17:47:44,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 468 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-25 17:47:44,781 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 276 flow [2022-11-25 17:47:44,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2022-11-25 17:47:44,782 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2022-11-25 17:47:44,782 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 276 flow [2022-11-25 17:47:44,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:44,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:44,783 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:44,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:47:44,784 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:44,784 INFO L85 PathProgramCache]: Analyzing trace with hash 167999390, now seen corresponding path program 1 times [2022-11-25 17:47:44,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:44,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988866894] [2022-11-25 17:47:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:44,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:45,151 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 17:47:45,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:45,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988866894] [2022-11-25 17:47:45,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988866894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:45,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:45,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:45,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694294912] [2022-11-25 17:47:45,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:45,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:45,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:45,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 488 [2022-11-25 17:47:45,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:45,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 488 [2022-11-25 17:47:45,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:50,022 INFO L130 PetriNetUnfolder]: 23821/33376 cut-off events. [2022-11-25 17:47:50,022 INFO L131 PetriNetUnfolder]: For 41173/42014 co-relation queries the response was YES. [2022-11-25 17:47:50,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87843 conditions, 33376 events. 23821/33376 cut-off events. For 41173/42014 co-relation queries the response was YES. Maximal size of possible extension queue 2291. Compared 228078 event pairs, 15560 based on Foata normal form. 850/16943 useless extension candidates. Maximal degree in co-relation 87822. Up to 33195 conditions per place. [2022-11-25 17:47:50,225 INFO L137 encePairwiseOnDemand]: 479/488 looper letters, 47 selfloop transitions, 6 changer transitions 23/81 dead transitions. [2022-11-25 17:47:50,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 81 transitions, 468 flow [2022-11-25 17:47:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:47:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:47:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 860 transitions. [2022-11-25 17:47:50,228 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4405737704918033 [2022-11-25 17:47:50,228 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 860 transitions. [2022-11-25 17:47:50,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 860 transitions. [2022-11-25 17:47:50,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:50,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 860 transitions. [2022-11-25 17:47:50,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,235 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,236 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 276 flow. Second operand 4 states and 860 transitions. [2022-11-25 17:47:50,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 81 transitions, 468 flow [2022-11-25 17:47:50,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:50,260 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 267 flow [2022-11-25 17:47:50,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2022-11-25 17:47:50,261 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2022-11-25 17:47:50,261 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 267 flow [2022-11-25 17:47:50,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:50,262 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:50,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:47:50,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2022-11-25 17:47:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash -439356067, now seen corresponding path program 1 times [2022-11-25 17:47:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:50,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010238228] [2022-11-25 17:47:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:50,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:50,398 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 17:47:50,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:50,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010238228] [2022-11-25 17:47:50,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010238228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:50,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:50,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:50,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880579832] [2022-11-25 17:47:50,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:50,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:50,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:50,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:50,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 488 [2022-11-25 17:47:50,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:50,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 488 [2022-11-25 17:47:50,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand