./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/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_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/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_daf83e5b-3828-40f4-a7fc-3679c7187af3/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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- 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 17:51:36,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:51:36,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:51:36,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:51:36,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:51:36,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:51:36,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:51:36,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:51:36,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:51:36,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:51:36,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:51:36,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:51:36,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:51:36,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:51:36,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:51:36,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:51:36,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:51:36,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:51:36,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:51:36,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:51:36,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:51:36,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:51:36,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:51:36,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:51:36,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:51:36,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:51:36,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:51:36,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:51:36,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:51:36,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:51:36,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:51:36,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:51:36,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:51:36,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:51:36,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:51:36,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:51:36,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:51:36,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:51:36,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:51:36,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:51:36,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:51:36,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 17:51:36,952 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:51:36,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:51:36,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:51:36,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:51:36,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:51:36,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:51:36,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:51:36,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:51:36,956 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:51:36,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:51:36,958 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:51:36,958 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:51:36,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:51:36,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:51:36,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:51:36,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:51:36,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:51:36,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:51:36,960 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 17:51:36,960 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:51:36,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:51:36,961 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:51:36,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:51:36,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:51:36,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:51:36,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:51:36,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:51:36,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:51:36,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:51:36,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:51:36,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:51:36,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:51:36,965 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:51:36,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:51:36,965 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:51:36,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:51:36,966 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_daf83e5b-3828-40f4-a7fc-3679c7187af3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-11-25 17:51:37,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:51:37,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:51:37,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:51:37,282 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:51:37,282 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:51:37,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-25 17:51:40,295 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:51:40,577 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:51:40,578 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-25 17:51:40,586 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/data/1615aadfb/af4157f498ad4d77b7f41dccaac314bf/FLAG897dcca7a [2022-11-25 17:51:40,606 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/data/1615aadfb/af4157f498ad4d77b7f41dccaac314bf [2022-11-25 17:51:40,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:51:40,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:51:40,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:51:40,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:51:40,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:51:40,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:40" (1/1) ... [2022-11-25 17:51:40,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399066a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:40, skipping insertion in model container [2022-11-25 17:51:40,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:40" (1/1) ... [2022-11-25 17:51:40,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:51:40,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:51:40,871 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,874 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,884 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,885 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,885 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,903 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,905 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,905 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,907 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,909 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,927 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_daf83e5b-3828-40f4-a7fc-3679c7187af3/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-25 17:51:40,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:51:40,948 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:51:40,973 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,976 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,977 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,977 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:40,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:40,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:41,000 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:41,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:41,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:41,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:51:41,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:51:41,007 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_daf83e5b-3828-40f4-a7fc-3679c7187af3/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-25 17:51:41,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:51:41,030 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:51:41,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41 WrapperNode [2022-11-25 17:51:41,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:51:41,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:51:41,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:51:41,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:51:41,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,104 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 171 [2022-11-25 17:51:41,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:51:41,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:51:41,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:51:41,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:51:41,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,159 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:51:41,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:51:41,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:51:41,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:51:41,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (1/1) ... [2022-11-25 17:51:41,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:51:41,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:41,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:51:41,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:51:41,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:51:41,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:51:41,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:51:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:51:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:51:41,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:51:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:51:41,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:51:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:51:41,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:51:41,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:51:41,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:51:41,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:51:41,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:51:41,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:51:41,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:51:41,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:51:41,252 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 17:51:41,361 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:51:41,363 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:51:41,878 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:51:42,105 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:51:42,106 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:51:42,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:42 BoogieIcfgContainer [2022-11-25 17:51:42,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:51:42,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:51:42,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:51:42,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:51:42,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:51:40" (1/3) ... [2022-11-25 17:51:42,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a5be5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:42, skipping insertion in model container [2022-11-25 17:51:42,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:41" (2/3) ... [2022-11-25 17:51:42,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a5be5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:42, skipping insertion in model container [2022-11-25 17:51:42,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:42" (3/3) ... [2022-11-25 17:51:42,120 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-11-25 17:51:42,128 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:51:42,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:51:42,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 17:51:42,137 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:51:42,302 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:51:42,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 153 transitions, 330 flow [2022-11-25 17:51:42,426 INFO L130 PetriNetUnfolder]: 10/150 cut-off events. [2022-11-25 17:51:42,426 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:51:42,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 10/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-25 17:51:42,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 153 transitions, 330 flow [2022-11-25 17:51:42,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 134 transitions, 280 flow [2022-11-25 17:51:42,441 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:51:42,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 134 transitions, 280 flow [2022-11-25 17:51:42,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 134 transitions, 280 flow [2022-11-25 17:51:42,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 134 transitions, 280 flow [2022-11-25 17:51:42,515 INFO L130 PetriNetUnfolder]: 10/134 cut-off events. [2022-11-25 17:51:42,516 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:51:42,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 134 events. 10/134 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 143 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-25 17:51:42,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 1818 [2022-11-25 17:51:49,586 INFO L134 LiptonReduction]: Checked pairs total: 2661 [2022-11-25 17:51:49,587 INFO L136 LiptonReduction]: Total number of compositions: 136 [2022-11-25 17:51:49,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:51:49,619 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;@67046345, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:51:49,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-25 17:51:49,623 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:51:49,623 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:51:49,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:49,624 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:51:49,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:51:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash 21510, now seen corresponding path program 1 times [2022-11-25 17:51:49,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:49,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068130203] [2022-11-25 17:51:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:49,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:49,914 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 17:51:49,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:49,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068130203] [2022-11-25 17:51:49,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068130203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:49,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:49,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:51:49,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520028004] [2022-11-25 17:51:49,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:49,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:51:49,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:49,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:51:49,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:51:49,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 289 [2022-11-25 17:51:49,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:49,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:49,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 289 [2022-11-25 17:51:49,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:50,267 INFO L130 PetriNetUnfolder]: 845/1357 cut-off events. [2022-11-25 17:51:50,268 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-11-25 17:51:50,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2875 conditions, 1357 events. 845/1357 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7768 event pairs, 806 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 1300. Up to 661 conditions per place. [2022-11-25 17:51:50,281 INFO L137 encePairwiseOnDemand]: 282/289 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-11-25 17:51:50,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 210 flow [2022-11-25 17:51:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:51:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:51:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2022-11-25 17:51:50,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.497116493656286 [2022-11-25 17:51:50,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2022-11-25 17:51:50,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2022-11-25 17:51:50,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:50,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2022-11-25 17:51:50,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:50,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:50,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:50,315 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 72 flow. Second operand 3 states and 431 transitions. [2022-11-25 17:51:50,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 210 flow [2022-11-25 17:51:50,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 48 transitions, 198 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:51:50,326 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 74 flow [2022-11-25 17:51:50,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2022-11-25 17:51:50,334 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2022-11-25 17:51:50,334 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 74 flow [2022-11-25 17:51:50,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:50,335 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:50,335 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:51:50,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:51:50,336 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:51:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:50,337 INFO L85 PathProgramCache]: Analyzing trace with hash 667674, now seen corresponding path program 1 times [2022-11-25 17:51:50,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:50,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917044446] [2022-11-25 17:51:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:50,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:50,540 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 17:51:50,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917044446] [2022-11-25 17:51:50,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917044446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:50,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:50,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:51:50,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700620115] [2022-11-25 17:51:50,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:50,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:51:50,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:51:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:51:50,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 289 [2022-11-25 17:51:50,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:50,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:50,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 289 [2022-11-25 17:51:50,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:50,796 INFO L130 PetriNetUnfolder]: 845/1356 cut-off events. [2022-11-25 17:51:50,796 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:51:50,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2851 conditions, 1356 events. 845/1356 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 7861 event pairs, 806 based on Foata normal form. 0/811 useless extension candidates. Maximal degree in co-relation 1423. Up to 1316 conditions per place. [2022-11-25 17:51:50,806 INFO L137 encePairwiseOnDemand]: 287/289 looper letters, 23 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-11-25 17:51:50,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 118 flow [2022-11-25 17:51:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:51:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:51:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2022-11-25 17:51:50,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46366782006920415 [2022-11-25 17:51:50,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2022-11-25 17:51:50,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2022-11-25 17:51:50,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:50,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2022-11-25 17:51:50,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:50,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:50,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:50,814 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 74 flow. Second operand 3 states and 402 transitions. [2022-11-25 17:51:50,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 118 flow [2022-11-25 17:51:50,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:51:50,816 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 70 flow [2022-11-25 17:51:50,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2022-11-25 17:51:50,817 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2022-11-25 17:51:50,817 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 70 flow [2022-11-25 17:51:50,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:50,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:50,818 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:51:50,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:51:50,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:51:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:50,819 INFO L85 PathProgramCache]: Analyzing trace with hash 667675, now seen corresponding path program 1 times [2022-11-25 17:51:50,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:50,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519006874] [2022-11-25 17:51:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:50,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:50,921 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 17:51:50,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:50,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519006874] [2022-11-25 17:51:50,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519006874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:50,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380500735] [2022-11-25 17:51:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:50,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:50,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:50,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:50,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:51:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:51:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:51,075 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 17:51:51,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:51,100 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 17:51:51,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380500735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:51,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:51,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 17:51:51,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670721657] [2022-11-25 17:51:51,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:51,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:51:51,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:51:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:51:51,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 289 [2022-11-25 17:51:51,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 127.14285714285714) internal successors, (890), 7 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:51,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:51,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 289 [2022-11-25 17:51:51,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:51,763 INFO L130 PetriNetUnfolder]: 2111/3387 cut-off events. [2022-11-25 17:51:51,763 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:51:51,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7111 conditions, 3387 events. 2111/3387 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 22186 event pairs, 2015 based on Foata normal form. 0/2026 useless extension candidates. Maximal degree in co-relation 7103. Up to 660 conditions per place. [2022-11-25 17:51:51,785 INFO L137 encePairwiseOnDemand]: 286/289 looper letters, 102 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2022-11-25 17:51:51,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 110 transitions, 480 flow [2022-11-25 17:51:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:51:51,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:51:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 866 transitions. [2022-11-25 17:51:51,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4994232987312572 [2022-11-25 17:51:51,789 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 866 transitions. [2022-11-25 17:51:51,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 866 transitions. [2022-11-25 17:51:51,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:51,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 866 transitions. [2022-11-25 17:51:51,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.33333333333334) internal successors, (866), 6 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:51,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:51,797 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:51,798 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 70 flow. Second operand 6 states and 866 transitions. [2022-11-25 17:51:51,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 110 transitions, 480 flow [2022-11-25 17:51:51,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 110 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:51:51,800 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 105 flow [2022-11-25 17:51:51,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-11-25 17:51:51,801 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2022-11-25 17:51:51,801 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 105 flow [2022-11-25 17:51:51,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 127.14285714285714) internal successors, (890), 7 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:51,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:51,803 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:51:51,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:51:52,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:52,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:51:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash 641778245, now seen corresponding path program 1 times [2022-11-25 17:51:52,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:52,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355090561] [2022-11-25 17:51:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:52,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:52,143 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 17:51:52,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:52,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355090561] [2022-11-25 17:51:52,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355090561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:52,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:52,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:51:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982626795] [2022-11-25 17:51:52,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:52,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:51:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:51:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:51:52,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 289 [2022-11-25 17:51:52,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:52,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:52,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 289 [2022-11-25 17:51:52,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:52,748 INFO L130 PetriNetUnfolder]: 2656/4092 cut-off events. [2022-11-25 17:51:52,748 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-25 17:51:52,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8371 conditions, 4092 events. 2656/4092 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 24573 event pairs, 895 based on Foata normal form. 0/2292 useless extension candidates. Maximal degree in co-relation 8359. Up to 2921 conditions per place. [2022-11-25 17:51:52,776 INFO L137 encePairwiseOnDemand]: 283/289 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2022-11-25 17:51:52,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 206 flow [2022-11-25 17:51:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:51:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:51:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2022-11-25 17:51:52,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47635524798154555 [2022-11-25 17:51:52,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2022-11-25 17:51:52,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2022-11-25 17:51:52,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:52,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2022-11-25 17:51:52,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:52,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:52,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:52,785 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 105 flow. Second operand 3 states and 413 transitions. [2022-11-25 17:51:52,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 206 flow [2022-11-25 17:51:52,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 198 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 17:51:52,790 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 115 flow [2022-11-25 17:51:52,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2022-11-25 17:51:52,792 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2022-11-25 17:51:52,792 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 115 flow [2022-11-25 17:51:52,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:52,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:52,793 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:51:52,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:51:52,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:51:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1583302393, now seen corresponding path program 2 times [2022-11-25 17:51:52,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:52,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87315636] [2022-11-25 17:51:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:52,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:52,965 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 17:51:52,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:52,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87315636] [2022-11-25 17:51:52,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87315636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:52,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044250996] [2022-11-25 17:51:52,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:51:52,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:52,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:52,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:51:53,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:51:53,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:53,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:51:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:53,081 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 17:51:53,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:51:53,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044250996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:53,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:51:53,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-25 17:51:53,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019449836] [2022-11-25 17:51:53,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:53,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:51:53,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:53,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:51:53,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:51:53,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 289 [2022-11-25 17:51:53,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:53,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:53,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 289 [2022-11-25 17:51:53,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:53,681 INFO L130 PetriNetUnfolder]: 2656/4041 cut-off events. [2022-11-25 17:51:53,681 INFO L131 PetriNetUnfolder]: For 368/368 co-relation queries the response was YES. [2022-11-25 17:51:53,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9634 conditions, 4041 events. 2656/4041 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 23977 event pairs, 1855 based on Foata normal form. 1/2722 useless extension candidates. Maximal degree in co-relation 9620. Up to 3886 conditions per place. [2022-11-25 17:51:53,706 INFO L137 encePairwiseOnDemand]: 287/289 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-11-25 17:51:53,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 159 flow [2022-11-25 17:51:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:51:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:51:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2022-11-25 17:51:53,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4659746251441753 [2022-11-25 17:51:53,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2022-11-25 17:51:53,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2022-11-25 17:51:53,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:53,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2022-11-25 17:51:53,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:53,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:53,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:53,717 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 115 flow. Second operand 3 states and 404 transitions. [2022-11-25 17:51:53,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 159 flow [2022-11-25 17:51:53,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 147 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 17:51:53,720 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 95 flow [2022-11-25 17:51:53,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2022-11-25 17:51:53,723 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2022-11-25 17:51:53,723 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 95 flow [2022-11-25 17:51:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:53,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:53,726 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:53,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:53,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:53,931 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:51:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1721933749, now seen corresponding path program 1 times [2022-11-25 17:51:53,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:53,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934421147] [2022-11-25 17:51:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:53,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:54,061 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 17:51:54,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934421147] [2022-11-25 17:51:54,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934421147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:54,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:54,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:51:54,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398686774] [2022-11-25 17:51:54,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:54,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:51:54,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 289 [2022-11-25 17:51:54,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:54,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:54,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 289 [2022-11-25 17:51:54,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:54,585 INFO L130 PetriNetUnfolder]: 2184/3347 cut-off events. [2022-11-25 17:51:54,586 INFO L131 PetriNetUnfolder]: For 304/304 co-relation queries the response was YES. [2022-11-25 17:51:54,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 3347 events. 2184/3347 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 19331 event pairs, 1543 based on Foata normal form. 16/2307 useless extension candidates. Maximal degree in co-relation 7873. Up to 3110 conditions per place. [2022-11-25 17:51:54,609 INFO L137 encePairwiseOnDemand]: 283/289 looper letters, 25 selfloop transitions, 2 changer transitions 13/43 dead transitions. [2022-11-25 17:51:54,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 207 flow [2022-11-25 17:51:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:51:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:51:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2022-11-25 17:51:54,612 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4593425605536332 [2022-11-25 17:51:54,613 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2022-11-25 17:51:54,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2022-11-25 17:51:54,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:54,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2022-11-25 17:51:54,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:54,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 289.0) internal successors, (1445), 5 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:54,618 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 289.0) internal successors, (1445), 5 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:54,619 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 95 flow. Second operand 4 states and 531 transitions. [2022-11-25 17:51:54,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 207 flow [2022-11-25 17:51:54,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:51:54,620 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 108 flow [2022-11-25 17:51:54,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2022-11-25 17:51:54,621 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2022-11-25 17:51:54,622 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 108 flow [2022-11-25 17:51:54,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:54,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:54,622 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:51:54,623 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:51:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1019350857, now seen corresponding path program 1 times [2022-11-25 17:51:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:54,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333550814] [2022-11-25 17:51:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:54,760 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 17:51:54,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:54,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333550814] [2022-11-25 17:51:54,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333550814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:54,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591239283] [2022-11-25 17:51:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:54,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:54,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:54,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:54,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:51:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:54,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:51:54,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:54,883 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 17:51:54,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:51:54,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591239283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:54,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:51:54,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-25 17:51:54,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596460191] [2022-11-25 17:51:54,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:54,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:51:54,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:54,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:51:54,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:51:54,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 289 [2022-11-25 17:51:54,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:54,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:54,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 289 [2022-11-25 17:51:54,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:55,146 INFO L130 PetriNetUnfolder]: 973/1538 cut-off events. [2022-11-25 17:51:55,146 INFO L131 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-11-25 17:51:55,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 1538 events. 973/1538 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7831 event pairs, 644 based on Foata normal form. 184/1498 useless extension candidates. Maximal degree in co-relation 3709. Up to 1462 conditions per place. [2022-11-25 17:51:55,155 INFO L137 encePairwiseOnDemand]: 285/289 looper letters, 20 selfloop transitions, 1 changer transitions 3/27 dead transitions. [2022-11-25 17:51:55,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 27 transitions, 144 flow [2022-11-25 17:51:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:51:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:51:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2022-11-25 17:51:55,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46482122260668973 [2022-11-25 17:51:55,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2022-11-25 17:51:55,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2022-11-25 17:51:55,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:55,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2022-11-25 17:51:55,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:55,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:55,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:55,161 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 108 flow. Second operand 3 states and 403 transitions. [2022-11-25 17:51:55,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 27 transitions, 144 flow [2022-11-25 17:51:55,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 17:51:55,164 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 83 flow [2022-11-25 17:51:55,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2022-11-25 17:51:55,165 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2022-11-25 17:51:55,165 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 83 flow [2022-11-25 17:51:55,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:55,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:55,166 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:55,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:55,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:55,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:51:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -343616293, now seen corresponding path program 1 times [2022-11-25 17:51:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183913704] [2022-11-25 17:51:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:55,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:56,061 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 17:51:56,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183913704] [2022-11-25 17:51:56,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183913704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522112360] [2022-11-25 17:51:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:56,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:56,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:56,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:56,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:51:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 17:51:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:56,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:51:56,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:51:56,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:51:56,541 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 17:51:56,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:57,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:51:57,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-25 17:51:57,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:51:57,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 148 [2022-11-25 17:51:57,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:51:57,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 124 [2022-11-25 17:51:57,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:51:57,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 85 [2022-11-25 17:51:57,548 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 17:51:57,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522112360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:57,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:57,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-11-25 17:51:57,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125829160] [2022-11-25 17:51:57,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:57,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:51:57,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:57,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:51:57,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=251, Unknown=2, NotChecked=0, Total=342 [2022-11-25 17:51:58,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 289 [2022-11-25 17:51:58,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 83 flow. Second operand has 19 states, 19 states have (on average 78.57894736842105) internal successors, (1493), 19 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:58,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:58,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 289 [2022-11-25 17:51:58,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:00,799 INFO L130 PetriNetUnfolder]: 2024/3196 cut-off events. [2022-11-25 17:52:00,800 INFO L131 PetriNetUnfolder]: For 259/259 co-relation queries the response was YES. [2022-11-25 17:52:00,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7779 conditions, 3196 events. 2024/3196 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17248 event pairs, 280 based on Foata normal form. 12/2843 useless extension candidates. Maximal degree in co-relation 7766. Up to 1251 conditions per place. [2022-11-25 17:52:00,820 INFO L137 encePairwiseOnDemand]: 276/289 looper letters, 119 selfloop transitions, 66 changer transitions 3/188 dead transitions. [2022-11-25 17:52:00,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 188 transitions, 912 flow [2022-11-25 17:52:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:52:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:52:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2118 transitions. [2022-11-25 17:52:00,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29314878892733565 [2022-11-25 17:52:00,828 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2118 transitions. [2022-11-25 17:52:00,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2118 transitions. [2022-11-25 17:52:00,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:00,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2118 transitions. [2022-11-25 17:52:00,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 84.72) internal successors, (2118), 25 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:00,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 289.0) internal successors, (7514), 26 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:00,851 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 289.0) internal successors, (7514), 26 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:00,851 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 83 flow. Second operand 25 states and 2118 transitions. [2022-11-25 17:52:00,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 188 transitions, 912 flow [2022-11-25 17:52:00,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 188 transitions, 911 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:00,858 INFO L231 Difference]: Finished difference. Result has 71 places, 94 transitions, 600 flow [2022-11-25 17:52:00,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=600, PETRI_PLACES=71, PETRI_TRANSITIONS=94} [2022-11-25 17:52:00,861 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2022-11-25 17:52:00,862 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 94 transitions, 600 flow [2022-11-25 17:52:00,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 78.57894736842105) internal successors, (1493), 19 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:00,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:00,864 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:00,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:01,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:01,070 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:52:01,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash 912927379, now seen corresponding path program 1 times [2022-11-25 17:52:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:01,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065336702] [2022-11-25 17:52:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:01,987 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 17:52:01,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:01,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065336702] [2022-11-25 17:52:01,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065336702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:01,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908373943] [2022-11-25 17:52:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:01,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:01,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:01,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:02,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:52:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:02,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:52:02,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:02,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:52:02,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:52:02,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:52:02,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:02,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:52:02,606 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 17:52:02,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:03,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:03,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2022-11-25 17:52:03,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:03,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1568 treesize of output 1500 [2022-11-25 17:52:03,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:03,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1488 treesize of output 1380 [2022-11-25 17:52:03,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1254 treesize of output 1062 [2022-11-25 17:52:03,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:03,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1176 treesize of output 1128 [2022-11-25 17:52:06,157 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 17:52:06,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908373943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:06,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:06,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2022-11-25 17:52:06,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471749029] [2022-11-25 17:52:06,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:06,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:52:06,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:52:06,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=450, Unknown=5, NotChecked=0, Total=552 [2022-11-25 17:52:06,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 289 [2022-11-25 17:52:06,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 600 flow. Second operand has 24 states, 24 states have (on average 75.375) internal successors, (1809), 24 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:06,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:06,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 289 [2022-11-25 17:52:06,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:14,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:15,876 INFO L130 PetriNetUnfolder]: 2541/4021 cut-off events. [2022-11-25 17:52:15,877 INFO L131 PetriNetUnfolder]: For 17171/17171 co-relation queries the response was YES. [2022-11-25 17:52:15,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17095 conditions, 4021 events. 2541/4021 cut-off events. For 17171/17171 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 22669 event pairs, 651 based on Foata normal form. 160/4181 useless extension candidates. Maximal degree in co-relation 17067. Up to 1846 conditions per place. [2022-11-25 17:52:15,915 INFO L137 encePairwiseOnDemand]: 276/289 looper letters, 172 selfloop transitions, 109 changer transitions 3/284 dead transitions. [2022-11-25 17:52:15,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 284 transitions, 2342 flow [2022-11-25 17:52:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:52:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 17:52:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2660 transitions. [2022-11-25 17:52:15,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.27891370451924086 [2022-11-25 17:52:15,929 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2660 transitions. [2022-11-25 17:52:15,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2660 transitions. [2022-11-25 17:52:15,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:15,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2660 transitions. [2022-11-25 17:52:15,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 80.60606060606061) internal successors, (2660), 33 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:15,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 289.0) internal successors, (9826), 34 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:15,955 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 289.0) internal successors, (9826), 34 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:15,955 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 600 flow. Second operand 33 states and 2660 transitions. [2022-11-25 17:52:15,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 284 transitions, 2342 flow [2022-11-25 17:52:15,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 284 transitions, 2240 flow, removed 47 selfloop flow, removed 4 redundant places. [2022-11-25 17:52:16,004 INFO L231 Difference]: Finished difference. Result has 121 places, 162 transitions, 1405 flow [2022-11-25 17:52:16,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1405, PETRI_PLACES=121, PETRI_TRANSITIONS=162} [2022-11-25 17:52:16,006 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 84 predicate places. [2022-11-25 17:52:16,006 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 162 transitions, 1405 flow [2022-11-25 17:52:16,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 75.375) internal successors, (1809), 24 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:16,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:16,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:16,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:16,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:16,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:52:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2062167296, now seen corresponding path program 1 times [2022-11-25 17:52:16,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:16,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661605646] [2022-11-25 17:52:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:16,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:17,345 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 17:52:17,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:17,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661605646] [2022-11-25 17:52:17,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661605646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:17,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709255835] [2022-11-25 17:52:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:17,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:17,346 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:17,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:52:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:52:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:17,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:52:17,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:52:17,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:52:17,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:17,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:52:17,916 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 17:52:17,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:18,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:18,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-11-25 17:52:18,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:18,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1504 treesize of output 1436 [2022-11-25 17:52:18,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:18,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1424 treesize of output 1376 [2022-11-25 17:52:18,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1238 treesize of output 1046 [2022-11-25 17:52:18,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:18,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1172 treesize of output 1064 [2022-11-25 17:52:30,050 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 17:52:30,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709255835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:30,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:30,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-11-25 17:52:30,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406441253] [2022-11-25 17:52:30,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:30,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:52:30,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:30,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:52:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=418, Unknown=2, NotChecked=0, Total=506 [2022-11-25 17:52:32,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 289 [2022-11-25 17:52:32,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 162 transitions, 1405 flow. Second operand has 23 states, 23 states have (on average 75.43478260869566) internal successors, (1735), 23 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:32,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 289 [2022-11-25 17:52:32,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:36,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:39,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:41,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:42,573 INFO L130 PetriNetUnfolder]: 4053/6348 cut-off events. [2022-11-25 17:52:42,573 INFO L131 PetriNetUnfolder]: For 73458/73458 co-relation queries the response was YES. [2022-11-25 17:52:42,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36107 conditions, 6348 events. 4053/6348 cut-off events. For 73458/73458 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 38138 event pairs, 482 based on Foata normal form. 359/6707 useless extension candidates. Maximal degree in co-relation 36057. Up to 1638 conditions per place. [2022-11-25 17:52:42,657 INFO L137 encePairwiseOnDemand]: 273/289 looper letters, 188 selfloop transitions, 196 changer transitions 7/391 dead transitions. [2022-11-25 17:52:42,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 391 transitions, 4191 flow [2022-11-25 17:52:42,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 17:52:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-25 17:52:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2607 transitions. [2022-11-25 17:52:42,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28189878892733566 [2022-11-25 17:52:42,670 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2607 transitions. [2022-11-25 17:52:42,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2607 transitions. [2022-11-25 17:52:42,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:42,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2607 transitions. [2022-11-25 17:52:42,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 81.46875) internal successors, (2607), 32 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:42,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 289.0) internal successors, (9537), 33 states have internal predecessors, (9537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:42,695 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 289.0) internal successors, (9537), 33 states have internal predecessors, (9537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:42,696 INFO L175 Difference]: Start difference. First operand has 121 places, 162 transitions, 1405 flow. Second operand 32 states and 2607 transitions. [2022-11-25 17:52:42,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 391 transitions, 4191 flow [2022-11-25 17:52:43,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 391 transitions, 4121 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-11-25 17:52:43,021 INFO L231 Difference]: Finished difference. Result has 159 places, 265 transitions, 3152 flow [2022-11-25 17:52:43,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3152, PETRI_PLACES=159, PETRI_TRANSITIONS=265} [2022-11-25 17:52:43,022 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 122 predicate places. [2022-11-25 17:52:43,022 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 265 transitions, 3152 flow [2022-11-25 17:52:43,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.43478260869566) internal successors, (1735), 23 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:43,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:43,024 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:43,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:43,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:52:43,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:52:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:43,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1023656668, now seen corresponding path program 1 times [2022-11-25 17:52:43,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:43,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826594758] [2022-11-25 17:52:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:44,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826594758] [2022-11-25 17:52:44,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826594758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080508572] [2022-11-25 17:52:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:44,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:44,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:44,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:52:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:52:44,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:52:44,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:44,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080508572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:44,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:44,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2022-11-25 17:52:44,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391657790] [2022-11-25 17:52:44,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:44,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:52:44,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:44,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:52:44,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:52:45,041 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 289 [2022-11-25 17:52:45,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 265 transitions, 3152 flow. Second operand has 6 states, 6 states have (on average 111.66666666666667) internal successors, (670), 6 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:45,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:45,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 289 [2022-11-25 17:52:45,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:46,101 INFO L130 PetriNetUnfolder]: 3401/5434 cut-off events. [2022-11-25 17:52:46,101 INFO L131 PetriNetUnfolder]: For 102223/102533 co-relation queries the response was YES. [2022-11-25 17:52:46,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39541 conditions, 5434 events. 3401/5434 cut-off events. For 102223/102533 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 33126 event pairs, 866 based on Foata normal form. 91/5442 useless extension candidates. Maximal degree in co-relation 39476. Up to 4405 conditions per place. [2022-11-25 17:52:46,170 INFO L137 encePairwiseOnDemand]: 281/289 looper letters, 283 selfloop transitions, 61 changer transitions 11/362 dead transitions. [2022-11-25 17:52:46,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 362 transitions, 4866 flow [2022-11-25 17:52:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:52:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:52:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 937 transitions. [2022-11-25 17:52:46,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40527681660899656 [2022-11-25 17:52:46,173 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 937 transitions. [2022-11-25 17:52:46,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 937 transitions. [2022-11-25 17:52:46,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:46,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 937 transitions. [2022-11-25 17:52:46,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.125) internal successors, (937), 8 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:46,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 289.0) internal successors, (2601), 9 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:46,179 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 289.0) internal successors, (2601), 9 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:46,179 INFO L175 Difference]: Start difference. First operand has 159 places, 265 transitions, 3152 flow. Second operand 8 states and 937 transitions. [2022-11-25 17:52:46,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 362 transitions, 4866 flow [2022-11-25 17:52:46,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 362 transitions, 4315 flow, removed 191 selfloop flow, removed 13 redundant places. [2022-11-25 17:52:46,955 INFO L231 Difference]: Finished difference. Result has 156 places, 311 transitions, 3448 flow [2022-11-25 17:52:46,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3448, PETRI_PLACES=156, PETRI_TRANSITIONS=311} [2022-11-25 17:52:46,957 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 119 predicate places. [2022-11-25 17:52:46,957 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 311 transitions, 3448 flow [2022-11-25 17:52:46,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.66666666666667) internal successors, (670), 6 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:46,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:46,958 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:46,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:47,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:47,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:52:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:47,161 INFO L85 PathProgramCache]: Analyzing trace with hash 927519402, now seen corresponding path program 2 times [2022-11-25 17:52:47,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:47,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179503923] [2022-11-25 17:52:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:47,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:48,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:48,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179503923] [2022-11-25 17:52:48,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179503923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:48,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474389329] [2022-11-25 17:52:48,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:48,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:48,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:48,354 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:48,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:52:48,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:52:48,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:52:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:52:48,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:48,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474389329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:48,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:48,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-11-25 17:52:48,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437190664] [2022-11-25 17:52:48,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:48,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:52:48,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:52:48,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:52:48,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 289 [2022-11-25 17:52:48,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 311 transitions, 3448 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:48,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:48,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 289 [2022-11-25 17:52:48,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:50,051 INFO L130 PetriNetUnfolder]: 3363/5454 cut-off events. [2022-11-25 17:52:50,051 INFO L131 PetriNetUnfolder]: For 83961/84096 co-relation queries the response was YES. [2022-11-25 17:52:50,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38244 conditions, 5454 events. 3363/5454 cut-off events. For 83961/84096 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34020 event pairs, 758 based on Foata normal form. 122/5513 useless extension candidates. Maximal degree in co-relation 38175. Up to 4260 conditions per place. [2022-11-25 17:52:50,150 INFO L137 encePairwiseOnDemand]: 281/289 looper letters, 261 selfloop transitions, 87 changer transitions 0/364 dead transitions. [2022-11-25 17:52:50,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 364 transitions, 4759 flow [2022-11-25 17:52:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:52:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:52:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 713 transitions. [2022-11-25 17:52:50,153 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41118800461361016 [2022-11-25 17:52:50,153 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 713 transitions. [2022-11-25 17:52:50,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 713 transitions. [2022-11-25 17:52:50,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:50,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 713 transitions. [2022-11-25 17:52:50,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.83333333333333) internal successors, (713), 6 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:50,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:50,158 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:50,159 INFO L175 Difference]: Start difference. First operand has 156 places, 311 transitions, 3448 flow. Second operand 6 states and 713 transitions. [2022-11-25 17:52:50,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 364 transitions, 4759 flow [2022-11-25 17:52:50,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 364 transitions, 4663 flow, removed 48 selfloop flow, removed 0 redundant places. [2022-11-25 17:52:50,599 INFO L231 Difference]: Finished difference. Result has 165 places, 338 transitions, 4082 flow [2022-11-25 17:52:50,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4082, PETRI_PLACES=165, PETRI_TRANSITIONS=338} [2022-11-25 17:52:50,601 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 128 predicate places. [2022-11-25 17:52:50,601 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 338 transitions, 4082 flow [2022-11-25 17:52:50,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:50,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:50,610 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:50,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:50,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:50,815 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:52:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1306361727, now seen corresponding path program 2 times [2022-11-25 17:52:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:50,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846994080] [2022-11-25 17:52:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:50,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:51,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846994080] [2022-11-25 17:52:51,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846994080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:51,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93176688] [2022-11-25 17:52:51,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:51,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:51,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:51,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:51,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:52:52,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:52:52,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:52:52,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:52,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:52,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:52:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:52:52,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:52,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93176688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:52,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:52,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2022-11-25 17:52:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299049258] [2022-11-25 17:52:52,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:52,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:52,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:52,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:52:52,542 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 289 [2022-11-25 17:52:52,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 338 transitions, 4082 flow. Second operand has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:52,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:52,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 289 [2022-11-25 17:52:52,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:54,163 INFO L130 PetriNetUnfolder]: 3220/5315 cut-off events. [2022-11-25 17:52:54,164 INFO L131 PetriNetUnfolder]: For 85581/85728 co-relation queries the response was YES. [2022-11-25 17:52:54,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37748 conditions, 5315 events. 3220/5315 cut-off events. For 85581/85728 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33852 event pairs, 664 based on Foata normal form. 238/5514 useless extension candidates. Maximal degree in co-relation 37673. Up to 3301 conditions per place. [2022-11-25 17:52:54,230 INFO L137 encePairwiseOnDemand]: 283/289 looper letters, 248 selfloop transitions, 96 changer transitions 0/360 dead transitions. [2022-11-25 17:52:54,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 360 transitions, 4989 flow [2022-11-25 17:52:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:52:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:52:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 681 transitions. [2022-11-25 17:52:54,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39273356401384085 [2022-11-25 17:52:54,233 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 681 transitions. [2022-11-25 17:52:54,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 681 transitions. [2022-11-25 17:52:54,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:54,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 681 transitions. [2022-11-25 17:52:54,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.5) internal successors, (681), 6 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:54,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:54,238 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:54,238 INFO L175 Difference]: Start difference. First operand has 165 places, 338 transitions, 4082 flow. Second operand 6 states and 681 transitions. [2022-11-25 17:52:54,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 360 transitions, 4989 flow [2022-11-25 17:52:54,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 360 transitions, 4900 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:54,581 INFO L231 Difference]: Finished difference. Result has 170 places, 335 transitions, 4240 flow [2022-11-25 17:52:54,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=3933, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4240, PETRI_PLACES=170, PETRI_TRANSITIONS=335} [2022-11-25 17:52:54,582 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 133 predicate places. [2022-11-25 17:52:54,583 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 335 transitions, 4240 flow [2022-11-25 17:52:54,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:54,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:54,583 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:54,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:54,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:52:54,785 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:52:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:54,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1842508367, now seen corresponding path program 1 times [2022-11-25 17:52:54,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:54,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904924897] [2022-11-25 17:52:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:54,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:56,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904924897] [2022-11-25 17:52:56,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904924897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264962494] [2022-11-25 17:52:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:56,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:56,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:56,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:56,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:52:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:56,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:52:56,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:56,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:52:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:56,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:56,542 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_520 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_520) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2022-11-25 17:52:56,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:56,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 70 [2022-11-25 17:52:56,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-25 17:52:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:52:57,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264962494] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:57,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:57,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2022-11-25 17:52:57,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101555394] [2022-11-25 17:52:57,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:57,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:57,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:57,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:57,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=294, Unknown=1, NotChecked=34, Total=380 [2022-11-25 17:52:57,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 289 [2022-11-25 17:52:57,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 335 transitions, 4240 flow. Second operand has 7 states, 7 states have (on average 93.71428571428571) internal successors, (656), 7 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:57,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:57,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 289 [2022-11-25 17:52:57,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:59,018 INFO L130 PetriNetUnfolder]: 4552/7304 cut-off events. [2022-11-25 17:52:59,018 INFO L131 PetriNetUnfolder]: For 108635/108635 co-relation queries the response was YES. [2022-11-25 17:52:59,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52429 conditions, 7304 events. 4552/7304 cut-off events. For 108635/108635 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46477 event pairs, 562 based on Foata normal form. 35/7339 useless extension candidates. Maximal degree in co-relation 52352. Up to 3350 conditions per place. [2022-11-25 17:52:59,153 INFO L137 encePairwiseOnDemand]: 274/289 looper letters, 368 selfloop transitions, 207 changer transitions 0/575 dead transitions. [2022-11-25 17:52:59,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 575 transitions, 8334 flow [2022-11-25 17:52:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:52:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:52:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 801 transitions. [2022-11-25 17:52:59,155 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34645328719723184 [2022-11-25 17:52:59,156 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 801 transitions. [2022-11-25 17:52:59,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 801 transitions. [2022-11-25 17:52:59,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:59,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 801 transitions. [2022-11-25 17:52:59,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 100.125) internal successors, (801), 8 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:59,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 289.0) internal successors, (2601), 9 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:59,162 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 289.0) internal successors, (2601), 9 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:59,162 INFO L175 Difference]: Start difference. First operand has 170 places, 335 transitions, 4240 flow. Second operand 8 states and 801 transitions. [2022-11-25 17:52:59,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 575 transitions, 8334 flow [2022-11-25 17:52:59,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 575 transitions, 8089 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-11-25 17:52:59,752 INFO L231 Difference]: Finished difference. Result has 174 places, 435 transitions, 6179 flow [2022-11-25 17:52:59,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6179, PETRI_PLACES=174, PETRI_TRANSITIONS=435} [2022-11-25 17:52:59,753 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 137 predicate places. [2022-11-25 17:52:59,753 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 435 transitions, 6179 flow [2022-11-25 17:52:59,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 93.71428571428571) internal successors, (656), 7 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:59,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:59,754 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:59,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:59,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:59,959 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:52:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1183648363, now seen corresponding path program 1 times [2022-11-25 17:52:59,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:59,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795432529] [2022-11-25 17:52:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:00,171 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 17:53:00,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:00,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795432529] [2022-11-25 17:53:00,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795432529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:00,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695464647] [2022-11-25 17:53:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:00,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:00,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:00,181 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:00,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:53:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:00,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:53:00,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:00,459 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 17:53:00,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:00,647 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 17:53:00,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695464647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:00,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:00,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-25 17:53:00,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867489966] [2022-11-25 17:53:00,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:00,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:53:00,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:00,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:53:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:53:00,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 289 [2022-11-25 17:53:00,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 435 transitions, 6179 flow. Second operand has 17 states, 17 states have (on average 118.76470588235294) internal successors, (2019), 17 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:00,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:00,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 289 [2022-11-25 17:53:00,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:02,567 INFO L130 PetriNetUnfolder]: 3136/5263 cut-off events. [2022-11-25 17:53:02,567 INFO L131 PetriNetUnfolder]: For 125619/126098 co-relation queries the response was YES. [2022-11-25 17:53:02,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42028 conditions, 5263 events. 3136/5263 cut-off events. For 125619/126098 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 34889 event pairs, 774 based on Foata normal form. 715/5828 useless extension candidates. Maximal degree in co-relation 41962. Up to 2335 conditions per place. [2022-11-25 17:53:02,619 INFO L137 encePairwiseOnDemand]: 282/289 looper letters, 148 selfloop transitions, 22 changer transitions 203/389 dead transitions. [2022-11-25 17:53:02,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 389 transitions, 6341 flow [2022-11-25 17:53:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:53:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:53:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1112 transitions. [2022-11-25 17:53:02,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4275278738946559 [2022-11-25 17:53:02,622 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1112 transitions. [2022-11-25 17:53:02,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1112 transitions. [2022-11-25 17:53:02,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:02,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1112 transitions. [2022-11-25 17:53:02,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.55555555555556) internal successors, (1112), 9 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:02,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 289.0) internal successors, (2890), 10 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:02,628 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 289.0) internal successors, (2890), 10 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:02,629 INFO L175 Difference]: Start difference. First operand has 174 places, 435 transitions, 6179 flow. Second operand 9 states and 1112 transitions. [2022-11-25 17:53:02,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 389 transitions, 6341 flow [2022-11-25 17:53:02,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 389 transitions, 5881 flow, removed 86 selfloop flow, removed 16 redundant places. [2022-11-25 17:53:02,986 INFO L231 Difference]: Finished difference. Result has 162 places, 183 transitions, 2655 flow [2022-11-25 17:53:02,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2655, PETRI_PLACES=162, PETRI_TRANSITIONS=183} [2022-11-25 17:53:02,987 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 125 predicate places. [2022-11-25 17:53:02,988 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 183 transitions, 2655 flow [2022-11-25 17:53:02,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 118.76470588235294) internal successors, (2019), 17 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:02,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:02,988 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:02,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:03,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:53:03,189 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:53:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2007034264, now seen corresponding path program 1 times [2022-11-25 17:53:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:03,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377092051] [2022-11-25 17:53:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:03,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:03,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377092051] [2022-11-25 17:53:03,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377092051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:03,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446611573] [2022-11-25 17:53:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:03,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:03,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:03,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:03,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:53:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:53:03,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:03,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 98 [2022-11-25 17:53:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:03,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:53:03,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446611573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:03,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:53:03,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-25 17:53:03,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695989250] [2022-11-25 17:53:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:03,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:53:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:53:03,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:53:03,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 289 [2022-11-25 17:53:03,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 183 transitions, 2655 flow. Second operand has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:03,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:03,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 289 [2022-11-25 17:53:03,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:04,674 INFO L130 PetriNetUnfolder]: 2617/4360 cut-off events. [2022-11-25 17:53:04,674 INFO L131 PetriNetUnfolder]: For 102947/103792 co-relation queries the response was YES. [2022-11-25 17:53:04,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35537 conditions, 4360 events. 2617/4360 cut-off events. For 102947/103792 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27033 event pairs, 460 based on Foata normal form. 366/4581 useless extension candidates. Maximal degree in co-relation 35481. Up to 2085 conditions per place. [2022-11-25 17:53:04,747 INFO L137 encePairwiseOnDemand]: 284/289 looper letters, 175 selfloop transitions, 52 changer transitions 19/262 dead transitions. [2022-11-25 17:53:04,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 262 transitions, 4434 flow [2022-11-25 17:53:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:53:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:53:04,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 534 transitions. [2022-11-25 17:53:04,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4619377162629758 [2022-11-25 17:53:04,750 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 534 transitions. [2022-11-25 17:53:04,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 534 transitions. [2022-11-25 17:53:04,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:04,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 534 transitions. [2022-11-25 17:53:04,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:04,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 289.0) internal successors, (1445), 5 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:04,753 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 289.0) internal successors, (1445), 5 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:04,753 INFO L175 Difference]: Start difference. First operand has 162 places, 183 transitions, 2655 flow. Second operand 4 states and 534 transitions. [2022-11-25 17:53:04,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 262 transitions, 4434 flow [2022-11-25 17:53:04,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 262 transitions, 4159 flow, removed 81 selfloop flow, removed 18 redundant places. [2022-11-25 17:53:04,995 INFO L231 Difference]: Finished difference. Result has 117 places, 207 transitions, 3095 flow [2022-11-25 17:53:04,995 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3095, PETRI_PLACES=117, PETRI_TRANSITIONS=207} [2022-11-25 17:53:04,996 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 80 predicate places. [2022-11-25 17:53:04,996 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 207 transitions, 3095 flow [2022-11-25 17:53:04,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:04,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:04,996 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:05,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:05,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:53:05,197 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:53:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:05,197 INFO L85 PathProgramCache]: Analyzing trace with hash -92535826, now seen corresponding path program 1 times [2022-11-25 17:53:05,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:05,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088023392] [2022-11-25 17:53:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:05,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:05,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:05,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088023392] [2022-11-25 17:53:05,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088023392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:05,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453573685] [2022-11-25 17:53:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:05,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:05,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:05,257 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:05,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:53:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:53:05,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:05,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:53:05,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453573685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:05,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:53:05,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-25 17:53:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981305303] [2022-11-25 17:53:05,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:53:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:53:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:05,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 289 [2022-11-25 17:53:05,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 207 transitions, 3095 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:05,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:05,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 289 [2022-11-25 17:53:05,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:06,262 INFO L130 PetriNetUnfolder]: 1875/3067 cut-off events. [2022-11-25 17:53:06,262 INFO L131 PetriNetUnfolder]: For 45811/45891 co-relation queries the response was YES. [2022-11-25 17:53:06,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22731 conditions, 3067 events. 1875/3067 cut-off events. For 45811/45891 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17027 event pairs, 225 based on Foata normal form. 290/3314 useless extension candidates. Maximal degree in co-relation 22684. Up to 1595 conditions per place. [2022-11-25 17:53:06,294 INFO L137 encePairwiseOnDemand]: 285/289 looper letters, 215 selfloop transitions, 26 changer transitions 0/251 dead transitions. [2022-11-25 17:53:06,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 251 transitions, 4151 flow [2022-11-25 17:53:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:53:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:53:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 521 transitions. [2022-11-25 17:53:06,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45069204152249137 [2022-11-25 17:53:06,296 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 521 transitions. [2022-11-25 17:53:06,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 521 transitions. [2022-11-25 17:53:06,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:06,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 521 transitions. [2022-11-25 17:53:06,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:06,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 289.0) internal successors, (1445), 5 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:06,299 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 289.0) internal successors, (1445), 5 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:06,299 INFO L175 Difference]: Start difference. First operand has 117 places, 207 transitions, 3095 flow. Second operand 4 states and 521 transitions. [2022-11-25 17:53:06,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 251 transitions, 4151 flow [2022-11-25 17:53:06,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 251 transitions, 4135 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-11-25 17:53:06,418 INFO L231 Difference]: Finished difference. Result has 121 places, 192 transitions, 2887 flow [2022-11-25 17:53:06,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=2802, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2887, PETRI_PLACES=121, PETRI_TRANSITIONS=192} [2022-11-25 17:53:06,419 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 84 predicate places. [2022-11-25 17:53:06,419 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 192 transitions, 2887 flow [2022-11-25 17:53:06,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:06,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:06,419 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:06,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:06,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:53:06,620 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:53:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1388496611, now seen corresponding path program 2 times [2022-11-25 17:53:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:06,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952332717] [2022-11-25 17:53:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:06,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:07,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:07,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952332717] [2022-11-25 17:53:07,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952332717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:07,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989758768] [2022-11-25 17:53:07,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:07,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:07,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:07,373 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:07,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:53:07,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:53:07,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 17:53:07,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:07,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:07,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:07,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:07,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 17:53:07,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:53:07,768 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:53:07,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-25 17:53:07,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:07,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-25 17:53:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:07,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-25 17:53:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:08,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2022-11-25 17:53:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:08,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:09,587 INFO L321 Elim1Store]: treesize reduction 40, result has 62.6 percent of original size [2022-11-25 17:53:09,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 179 [2022-11-25 17:53:09,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:09,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3109 treesize of output 3121 [2022-11-25 17:53:09,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:09,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3071 treesize of output 3060 [2022-11-25 17:53:09,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3047 treesize of output 3023 [2022-11-25 17:53:09,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:09,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3023 treesize of output 3024 [2022-11-25 17:53:09,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:09,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3031 treesize of output 2953 [2022-11-25 17:53:09,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2903 treesize of output 2519 [2022-11-25 17:53:10,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:10,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2519 treesize of output 2316 [2022-11-25 17:53:10,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:10,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2303 treesize of output 2208 [2022-11-25 17:53:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:32,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989758768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:32,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:32,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-25 17:53:32,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996853288] [2022-11-25 17:53:32,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:32,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:53:32,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:32,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:53:32,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=538, Unknown=3, NotChecked=0, Total=650 [2022-11-25 17:53:33,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 289 [2022-11-25 17:53:33,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 192 transitions, 2887 flow. Second operand has 26 states, 26 states have (on average 83.38461538461539) internal successors, (2168), 26 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:33,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:33,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 289 [2022-11-25 17:53:33,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:37,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:51,846 WARN L233 SmtUtils]: Spent 12.43s on a formula simplification. DAG size of input: 100 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:53:53,287 INFO L130 PetriNetUnfolder]: 3976/6559 cut-off events. [2022-11-25 17:53:53,287 INFO L131 PetriNetUnfolder]: For 94502/95260 co-relation queries the response was YES. [2022-11-25 17:53:53,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47780 conditions, 6559 events. 3976/6559 cut-off events. For 94502/95260 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 43776 event pairs, 589 based on Foata normal form. 418/6720 useless extension candidates. Maximal degree in co-relation 47731. Up to 2880 conditions per place. [2022-11-25 17:53:53,407 INFO L137 encePairwiseOnDemand]: 278/289 looper letters, 262 selfloop transitions, 339 changer transitions 6/623 dead transitions. [2022-11-25 17:53:53,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 623 transitions, 10479 flow [2022-11-25 17:53:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 17:53:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 17:53:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2656 transitions. [2022-11-25 17:53:53,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3063437139561707 [2022-11-25 17:53:53,412 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2656 transitions. [2022-11-25 17:53:53,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2656 transitions. [2022-11-25 17:53:53,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:53,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2656 transitions. [2022-11-25 17:53:53,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 88.53333333333333) internal successors, (2656), 30 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:53,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 289.0) internal successors, (8959), 31 states have internal predecessors, (8959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:53,427 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 289.0) internal successors, (8959), 31 states have internal predecessors, (8959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:53,427 INFO L175 Difference]: Start difference. First operand has 121 places, 192 transitions, 2887 flow. Second operand 30 states and 2656 transitions. [2022-11-25 17:53:53,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 623 transitions, 10479 flow [2022-11-25 17:53:53,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 623 transitions, 10391 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-25 17:53:53,714 INFO L231 Difference]: Finished difference. Result has 155 places, 473 transitions, 8519 flow [2022-11-25 17:53:53,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8519, PETRI_PLACES=155, PETRI_TRANSITIONS=473} [2022-11-25 17:53:53,714 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 118 predicate places. [2022-11-25 17:53:53,715 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 473 transitions, 8519 flow [2022-11-25 17:53:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 83.38461538461539) internal successors, (2168), 26 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:53,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:53,715 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:53,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-25 17:53:53,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:53:53,916 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:53:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash -723584451, now seen corresponding path program 1 times [2022-11-25 17:53:53,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:53,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902486767] [2022-11-25 17:53:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:54,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:54,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902486767] [2022-11-25 17:53:54,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902486767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:54,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856313552] [2022-11-25 17:53:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:54,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:54,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:54,885 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:54,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:53:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 17:53:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:55,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-11-25 17:53:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:55,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:56,366 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-25 17:53:56,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 277 treesize of output 247 [2022-11-25 17:53:56,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2022-11-25 17:53:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:58,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856313552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:58,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:58,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-25 17:53:58,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858931607] [2022-11-25 17:53:58,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:58,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:53:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:53:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=792, Unknown=5, NotChecked=0, Total=930 [2022-11-25 17:54:01,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 289 [2022-11-25 17:54:01,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 473 transitions, 8519 flow. Second operand has 31 states, 31 states have (on average 96.45161290322581) internal successors, (2990), 31 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:01,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:01,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 289 [2022-11-25 17:54:01,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:08,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:12,101 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~front~0 4))) (let ((.cse4 (+ c_~queue~0.offset .cse6))) (and (let ((.cse3 (select |c_#memory_int| c_~queue~0.base))) (or (= (mod |c_thread1Thread1of1ForFork1_~cond~0#1| 256) 0) (not (< c_~back~0 c_~n~0)) (not (<= 0 c_~back~0)) (let ((.cse0 (not (<= c_~back~0 2147483646))) (.cse1 (= (mod |c_thread2Thread1of1ForFork2_~b~0#1| 256) 0)) (.cse2 (select .cse3 (+ c_~queue~0.offset (* c_~back~0 4))))) (and (or .cse0 .cse1 (not (= .cse2 1))) (or .cse0 (not .cse1) (not (= (+ .cse2 1) 0))))) (forall ((v_ArrVal_759 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_759) c_~queue~0.base) (+ c_~queue~0.offset .cse6 4)))) (or (< (+ c_~sum~0 (select .cse3 .cse4) .cse5) 2147483648) (< .cse5 1)))))) (forall ((v_ArrVal_759 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_759) c_~queue~0.base) .cse4)) 2147483648))))) is different from false [2022-11-25 17:54:39,730 WARN L233 SmtUtils]: Spent 26.94s on a formula simplification. DAG size of input: 94 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:55:05,965 WARN L233 SmtUtils]: Spent 24.59s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:55:08,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:21,628 WARN L233 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 81 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:55:24,694 INFO L130 PetriNetUnfolder]: 8974/14702 cut-off events. [2022-11-25 17:55:24,694 INFO L131 PetriNetUnfolder]: For 249071/250542 co-relation queries the response was YES. [2022-11-25 17:55:24,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112748 conditions, 14702 events. 8974/14702 cut-off events. For 249071/250542 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 109754 event pairs, 1493 based on Foata normal form. 604/14806 useless extension candidates. Maximal degree in co-relation 112692. Up to 6540 conditions per place. [2022-11-25 17:55:25,077 INFO L137 encePairwiseOnDemand]: 274/289 looper letters, 691 selfloop transitions, 700 changer transitions 18/1415 dead transitions. [2022-11-25 17:55:25,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 1415 transitions, 25643 flow [2022-11-25 17:55:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 17:55:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-25 17:55:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 6172 transitions. [2022-11-25 17:55:25,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35010494072267284 [2022-11-25 17:55:25,093 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 6172 transitions. [2022-11-25 17:55:25,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 6172 transitions. [2022-11-25 17:55:25,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:25,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 6172 transitions. [2022-11-25 17:55:25,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 101.18032786885246) internal successors, (6172), 61 states have internal predecessors, (6172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:25,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 289.0) internal successors, (17918), 62 states have internal predecessors, (17918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:25,132 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 289.0) internal successors, (17918), 62 states have internal predecessors, (17918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:25,132 INFO L175 Difference]: Start difference. First operand has 155 places, 473 transitions, 8519 flow. Second operand 61 states and 6172 transitions. [2022-11-25 17:55:25,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 1415 transitions, 25643 flow [2022-11-25 17:55:25,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1415 transitions, 23422 flow, removed 1107 selfloop flow, removed 3 redundant places. [2022-11-25 17:55:25,828 INFO L231 Difference]: Finished difference. Result has 244 places, 992 transitions, 18667 flow [2022-11-25 17:55:25,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=18667, PETRI_PLACES=244, PETRI_TRANSITIONS=992} [2022-11-25 17:55:25,829 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 207 predicate places. [2022-11-25 17:55:25,829 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 992 transitions, 18667 flow [2022-11-25 17:55:25,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 96.45161290322581) internal successors, (2990), 31 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:25,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:25,830 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:25,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:26,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:26,030 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:55:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:26,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1504754061, now seen corresponding path program 3 times [2022-11-25 17:55:26,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:26,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686388339] [2022-11-25 17:55:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:26,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:27,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:27,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686388339] [2022-11-25 17:55:27,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686388339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:27,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887034977] [2022-11-25 17:55:27,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:55:27,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:27,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:27,997 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:27,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:55:28,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:55:28,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:28,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:55:28,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:28,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:28,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:55:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:28,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:55:28,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887034977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:55:28,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:55:28,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2022-11-25 17:55:28,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373371702] [2022-11-25 17:55:28,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:55:28,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:55:28,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:55:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:55:28,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 289 [2022-11-25 17:55:28,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 992 transitions, 18667 flow. Second operand has 7 states, 7 states have (on average 108.57142857142857) internal successors, (760), 7 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:28,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:28,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 289 [2022-11-25 17:55:28,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:35,350 INFO L130 PetriNetUnfolder]: 8595/14114 cut-off events. [2022-11-25 17:55:35,350 INFO L131 PetriNetUnfolder]: For 498504/499580 co-relation queries the response was YES. [2022-11-25 17:55:35,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140626 conditions, 14114 events. 8595/14114 cut-off events. For 498504/499580 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 104305 event pairs, 2465 based on Foata normal form. 462/14204 useless extension candidates. Maximal degree in co-relation 140537. Up to 9768 conditions per place. [2022-11-25 17:55:35,652 INFO L137 encePairwiseOnDemand]: 283/289 looper letters, 645 selfloop transitions, 312 changer transitions 0/1017 dead transitions. [2022-11-25 17:55:35,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1017 transitions, 20933 flow [2022-11-25 17:55:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:55:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:55:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 680 transitions. [2022-11-25 17:55:35,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39215686274509803 [2022-11-25 17:55:35,655 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 680 transitions. [2022-11-25 17:55:35,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 680 transitions. [2022-11-25 17:55:35,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:35,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 680 transitions. [2022-11-25 17:55:35,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.33333333333333) internal successors, (680), 6 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:35,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:35,660 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:35,660 INFO L175 Difference]: Start difference. First operand has 244 places, 992 transitions, 18667 flow. Second operand 6 states and 680 transitions. [2022-11-25 17:55:35,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1017 transitions, 20933 flow [2022-11-25 17:55:38,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1017 transitions, 19896 flow, removed 481 selfloop flow, removed 7 redundant places. [2022-11-25 17:55:38,616 INFO L231 Difference]: Finished difference. Result has 243 places, 990 transitions, 18516 flow [2022-11-25 17:55:38,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=17599, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=18516, PETRI_PLACES=243, PETRI_TRANSITIONS=990} [2022-11-25 17:55:38,617 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 206 predicate places. [2022-11-25 17:55:38,617 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 990 transitions, 18516 flow [2022-11-25 17:55:38,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.57142857142857) internal successors, (760), 7 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:38,617 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:38,617 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:38,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:38,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:38,818 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:55:38,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:38,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1730444336, now seen corresponding path program 1 times [2022-11-25 17:55:38,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:38,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393428505] [2022-11-25 17:55:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:38,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:40,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:40,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393428505] [2022-11-25 17:55:40,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393428505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:40,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152351043] [2022-11-25 17:55:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:40,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:40,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:40,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:55:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:55:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:55:40,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:40,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:40,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-25 17:55:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:41,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152351043] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:41,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:55:41,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 19 [2022-11-25 17:55:41,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110075528] [2022-11-25 17:55:41,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:55:41,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:55:41,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:41,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:55:41,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:55:41,593 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 289 [2022-11-25 17:55:41,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 990 transitions, 18516 flow. Second operand has 6 states, 6 states have (on average 110.16666666666667) internal successors, (661), 6 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:41,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:41,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 289 [2022-11-25 17:55:41,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:48,200 INFO L130 PetriNetUnfolder]: 8636/14204 cut-off events. [2022-11-25 17:55:48,200 INFO L131 PetriNetUnfolder]: For 468334/469686 co-relation queries the response was YES. [2022-11-25 17:55:48,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138774 conditions, 14204 events. 8636/14204 cut-off events. For 468334/469686 co-relation queries the response was YES. Maximal size of possible extension queue 959. Compared 105732 event pairs, 2871 based on Foata normal form. 110/13850 useless extension candidates. Maximal degree in co-relation 138684. Up to 11404 conditions per place. [2022-11-25 17:55:48,543 INFO L137 encePairwiseOnDemand]: 279/289 looper letters, 859 selfloop transitions, 169 changer transitions 1/1035 dead transitions. [2022-11-25 17:55:48,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 1035 transitions, 21113 flow [2022-11-25 17:55:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:55:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:55:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 916 transitions. [2022-11-25 17:55:48,547 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3961937716262976 [2022-11-25 17:55:48,547 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 916 transitions. [2022-11-25 17:55:48,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 916 transitions. [2022-11-25 17:55:48,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:48,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 916 transitions. [2022-11-25 17:55:48,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:48,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 289.0) internal successors, (2601), 9 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:48,552 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 289.0) internal successors, (2601), 9 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:48,553 INFO L175 Difference]: Start difference. First operand has 243 places, 990 transitions, 18516 flow. Second operand 8 states and 916 transitions. [2022-11-25 17:55:48,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 1035 transitions, 21113 flow [2022-11-25 17:55:51,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1035 transitions, 20473 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-11-25 17:55:51,724 INFO L231 Difference]: Finished difference. Result has 246 places, 988 transitions, 18291 flow [2022-11-25 17:55:51,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=17831, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18291, PETRI_PLACES=246, PETRI_TRANSITIONS=988} [2022-11-25 17:55:51,725 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 209 predicate places. [2022-11-25 17:55:51,725 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 988 transitions, 18291 flow [2022-11-25 17:55:51,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.16666666666667) internal successors, (661), 6 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:51,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:51,726 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:51,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:51,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:51,933 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:55:51,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:51,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1128668534, now seen corresponding path program 1 times [2022-11-25 17:55:51,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:51,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538509132] [2022-11-25 17:55:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538509132] [2022-11-25 17:55:53,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538509132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734485230] [2022-11-25 17:55:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:53,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:53,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:53,269 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:53,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:55:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:53,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:55:53,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:53,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:55:53,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:53,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:55:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:53,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:55:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:54,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:55,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:55,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2022-11-25 17:55:55,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:55,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 230 [2022-11-25 17:55:55,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:55,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 149 [2022-11-25 17:55:55,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:55,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 101 [2022-11-25 17:55:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:58,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734485230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:58,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:58,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-25 17:55:58,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802725425] [2022-11-25 17:55:58,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:58,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:55:58,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:58,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:55:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=808, Unknown=3, NotChecked=0, Total=930 [2022-11-25 17:56:01,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 289 [2022-11-25 17:56:01,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 988 transitions, 18291 flow. Second operand has 31 states, 31 states have (on average 78.45161290322581) internal successors, (2432), 31 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:01,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:56:01,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 289 [2022-11-25 17:56:01,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:24,159 INFO L130 PetriNetUnfolder]: 12825/20609 cut-off events. [2022-11-25 17:56:24,159 INFO L131 PetriNetUnfolder]: For 705470/705470 co-relation queries the response was YES. [2022-11-25 17:56:24,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201472 conditions, 20609 events. 12825/20609 cut-off events. For 705470/705470 co-relation queries the response was YES. Maximal size of possible extension queue 1158. Compared 152571 event pairs, 2603 based on Foata normal form. 367/20976 useless extension candidates. Maximal degree in co-relation 201381. Up to 12430 conditions per place. [2022-11-25 17:56:24,742 INFO L137 encePairwiseOnDemand]: 276/289 looper letters, 1002 selfloop transitions, 895 changer transitions 8/1905 dead transitions. [2022-11-25 17:56:24,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1905 transitions, 37175 flow [2022-11-25 17:56:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-25 17:56:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-25 17:56:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4727 transitions. [2022-11-25 17:56:24,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28695441024707097 [2022-11-25 17:56:24,751 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4727 transitions. [2022-11-25 17:56:24,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4727 transitions. [2022-11-25 17:56:24,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:24,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4727 transitions. [2022-11-25 17:56:24,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 82.9298245614035) internal successors, (4727), 57 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:24,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 289.0) internal successors, (16762), 58 states have internal predecessors, (16762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:24,780 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 289.0) internal successors, (16762), 58 states have internal predecessors, (16762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:24,780 INFO L175 Difference]: Start difference. First operand has 246 places, 988 transitions, 18291 flow. Second operand 57 states and 4727 transitions. [2022-11-25 17:56:24,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1905 transitions, 37175 flow [2022-11-25 17:56:30,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1905 transitions, 36887 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:56:30,710 INFO L231 Difference]: Finished difference. Result has 331 places, 1623 transitions, 33137 flow [2022-11-25 17:56:30,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=17985, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=33137, PETRI_PLACES=331, PETRI_TRANSITIONS=1623} [2022-11-25 17:56:30,711 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 294 predicate places. [2022-11-25 17:56:30,711 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 1623 transitions, 33137 flow [2022-11-25 17:56:30,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 78.45161290322581) internal successors, (2432), 31 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:30,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:30,712 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:56:30,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:56:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 17:56:30,912 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:56:30,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1128668533, now seen corresponding path program 2 times [2022-11-25 17:56:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:30,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084256060] [2022-11-25 17:56:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:30,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:31,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:31,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084256060] [2022-11-25 17:56:31,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084256060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:56:31,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675410411] [2022-11-25 17:56:31,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:56:31,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:56:31,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:56:31,611 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:56:31,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:56:31,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:56:31,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:56:31,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:56:31,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:56:31,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:56:31,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:56:32,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:56:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:32,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:56:33,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:33,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-11-25 17:56:33,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:33,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 266 treesize of output 284 [2022-11-25 17:56:33,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:33,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 232 [2022-11-25 17:56:33,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:33,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 179 [2022-11-25 17:56:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:37,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675410411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:56:37,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:56:37,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-11-25 17:56:37,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295892161] [2022-11-25 17:56:37,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:56:37,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:56:37,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:37,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:56:37,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=721, Unknown=4, NotChecked=0, Total=870 [2022-11-25 17:56:40,533 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 289 [2022-11-25 17:56:40,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1623 transitions, 33137 flow. Second operand has 30 states, 30 states have (on average 78.5) internal successors, (2355), 30 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:56:40,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:56:40,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 289 [2022-11-25 17:56:40,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:49,523 WARN L233 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 87 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:56:54,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:17,701 INFO L130 PetriNetUnfolder]: 15201/24537 cut-off events. [2022-11-25 17:57:17,702 INFO L131 PetriNetUnfolder]: For 1056417/1056417 co-relation queries the response was YES. [2022-11-25 17:57:18,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257362 conditions, 24537 events. 15201/24537 cut-off events. For 1056417/1056417 co-relation queries the response was YES. Maximal size of possible extension queue 1469. Compared 188536 event pairs, 1572 based on Foata normal form. 514/25051 useless extension candidates. Maximal degree in co-relation 257236. Up to 10379 conditions per place. [2022-11-25 17:57:18,431 INFO L137 encePairwiseOnDemand]: 276/289 looper letters, 1276 selfloop transitions, 1353 changer transitions 19/2648 dead transitions. [2022-11-25 17:57:18,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 2648 transitions, 57642 flow [2022-11-25 17:57:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 17:57:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-25 17:57:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5400 transitions. [2022-11-25 17:57:18,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28746340165025286 [2022-11-25 17:57:18,449 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5400 transitions. [2022-11-25 17:57:18,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5400 transitions. [2022-11-25 17:57:18,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:57:18,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5400 transitions. [2022-11-25 17:57:18,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 83.07692307692308) internal successors, (5400), 65 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:57:18,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 289.0) internal successors, (19074), 66 states have internal predecessors, (19074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:57:18,484 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 289.0) internal successors, (19074), 66 states have internal predecessors, (19074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:57:18,484 INFO L175 Difference]: Start difference. First operand has 331 places, 1623 transitions, 33137 flow. Second operand 65 states and 5400 transitions. [2022-11-25 17:57:18,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 2648 transitions, 57642 flow [2022-11-25 17:57:39,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 2648 transitions, 54607 flow, removed 1502 selfloop flow, removed 9 redundant places. [2022-11-25 17:57:39,148 INFO L231 Difference]: Finished difference. Result has 417 places, 2176 transitions, 48408 flow [2022-11-25 17:57:39,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=29442, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=792, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=48408, PETRI_PLACES=417, PETRI_TRANSITIONS=2176} [2022-11-25 17:57:39,150 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 380 predicate places. [2022-11-25 17:57:39,151 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 2176 transitions, 48408 flow [2022-11-25 17:57:39,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 78.5) internal successors, (2355), 30 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:57:39,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:39,152 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:57:39,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-25 17:57:39,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:57:39,358 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:57:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1131880754, now seen corresponding path program 2 times [2022-11-25 17:57:39,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:39,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881749856] [2022-11-25 17:57:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:39,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:40,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881749856] [2022-11-25 17:57:40,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881749856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:57:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263522368] [2022-11-25 17:57:40,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:57:40,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:57:40,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:57:40,690 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:57:40,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:57:40,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:57:40,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:57:40,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 17:57:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:57:41,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:57:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:57:41,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:57:41,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:57:41,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:57:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:42,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:57:43,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:57:43,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2022-11-25 17:57:44,017 INFO L321 Elim1Store]: treesize reduction 14, result has 86.7 percent of original size [2022-11-25 17:57:44,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 583 treesize of output 597 [2022-11-25 17:57:44,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:57:44,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:57:44,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 401 treesize of output 387 [2022-11-25 17:57:44,168 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 17:57:44,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 450 treesize of output 384 [2022-11-25 17:57:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:49,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263522368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:57:49,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:57:49,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-25 17:57:49,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753468082] [2022-11-25 17:57:49,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:57:49,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:57:49,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:49,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:57:49,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=689, Unknown=3, NotChecked=0, Total=930 [2022-11-25 17:57:54,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 289 [2022-11-25 17:57:54,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 2176 transitions, 48408 flow. Second operand has 31 states, 31 states have (on average 78.45161290322581) internal successors, (2432), 31 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:57:54,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:54,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 289 [2022-11-25 17:57:54,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:01,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:58:46,469 INFO L130 PetriNetUnfolder]: 18860/30295 cut-off events. [2022-11-25 17:58:46,469 INFO L131 PetriNetUnfolder]: For 1548884/1548884 co-relation queries the response was YES. [2022-11-25 17:58:47,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349192 conditions, 30295 events. 18860/30295 cut-off events. For 1548884/1548884 co-relation queries the response was YES. Maximal size of possible extension queue 1898. Compared 238287 event pairs, 2378 based on Foata normal form. 979/31274 useless extension candidates. Maximal degree in co-relation 349034. Up to 15921 conditions per place. [2022-11-25 17:58:47,528 INFO L137 encePairwiseOnDemand]: 276/289 looper letters, 1594 selfloop transitions, 1781 changer transitions 13/3388 dead transitions. [2022-11-25 17:58:47,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 3388 transitions, 78544 flow [2022-11-25 17:58:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-25 17:58:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-11-25 17:58:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 4890 transitions. [2022-11-25 17:58:47,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28678669872734736 [2022-11-25 17:58:47,535 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 4890 transitions. [2022-11-25 17:58:47,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 4890 transitions. [2022-11-25 17:58:47,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:47,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 4890 transitions. [2022-11-25 17:58:47,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 82.88135593220339) internal successors, (4890), 59 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:47,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 289.0) internal successors, (17340), 60 states have internal predecessors, (17340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:47,561 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 289.0) internal successors, (17340), 60 states have internal predecessors, (17340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:47,561 INFO L175 Difference]: Start difference. First operand has 417 places, 2176 transitions, 48408 flow. Second operand 59 states and 4890 transitions. [2022-11-25 17:58:47,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 3388 transitions, 78544 flow [2022-11-25 17:59:25,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 3388 transitions, 75855 flow, removed 1252 selfloop flow, removed 14 redundant places. [2022-11-25 17:59:26,061 INFO L231 Difference]: Finished difference. Result has 476 places, 3028 transitions, 72045 flow [2022-11-25 17:59:26,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=44704, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=967, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=72045, PETRI_PLACES=476, PETRI_TRANSITIONS=3028} [2022-11-25 17:59:26,064 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 439 predicate places. [2022-11-25 17:59:26,064 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 3028 transitions, 72045 flow [2022-11-25 17:59:26,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 78.45161290322581) internal successors, (2432), 31 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:26,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:26,065 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:26,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:59:26,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 17:59:26,278 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-25 17:59:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash 229984057, now seen corresponding path program 3 times [2022-11-25 17:59:26,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:59:26,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036540188] [2022-11-25 17:59:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:26,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:59:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:28,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:59:28,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036540188] [2022-11-25 17:59:28,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036540188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:59:28,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356637748] [2022-11-25 17:59:28,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:59:28,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:59:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:59:28,070 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:59:28,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf83e5b-3828-40f4-a7fc-3679c7187af3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:59:28,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:59:28,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:59:28,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:59:28,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:59:28,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:59:29,216 INFO L321 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-11-25 17:59:29,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 176 [2022-11-25 17:59:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:59:29,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356637748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:59:29,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:59:29,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 22 [2022-11-25 17:59:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260960123] [2022-11-25 17:59:29,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:59:29,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:59:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:59:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:59:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:59:32,759 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 289 [2022-11-25 17:59:32,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 3028 transitions, 72045 flow. Second operand has 24 states, 24 states have (on average 96.70833333333333) internal successors, (2321), 24 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:32,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:59:32,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 289 [2022-11-25 17:59:32,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand