./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 12:33:00,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:33:00,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:33:00,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:33:00,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:33:00,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:33:00,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:33:00,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:33:00,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:33:00,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:33:00,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:33:00,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:33:00,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:33:00,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:33:00,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:33:00,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:33:00,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:33:00,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:33:00,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:33:00,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:33:00,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:33:00,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:33:00,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:33:00,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:33:00,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:33:00,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:33:00,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:33:00,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:33:00,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:33:00,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:33:00,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:33:00,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:33:00,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:33:00,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:33:00,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:33:00,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:33:00,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:33:00,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:33:00,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:33:00,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:33:00,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:33:00,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 12:33:00,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:33:00,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:33:00,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:33:00,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:33:00,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:33:00,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:33:00,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:33:00,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:33:00,557 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:33:00,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:33:00,557 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:33:00,558 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:33:00,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:33:00,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:33:00,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:33:00,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:33:00,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:33:00,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:33:00,559 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 12:33:00,559 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:33:00,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:33:00,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:33:00,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:33:00,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:33:00,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:33:00,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:33:00,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:33:00,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:33:00,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:33:00,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:33:00,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:33:00,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:33:00,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:33:00,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:33:00,562 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:33:00,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:33:00,562 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:33:00,563 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_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-12-13 12:33:00,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:33:00,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:33:00,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:33:00,758 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:33:00,758 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:33:00,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-12-13 12:33:03,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:33:03,548 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:33:03,549 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-12-13 12:33:03,554 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/data/029dac34c/cef2f4c46c1d43bdbde10c5dd20fd53f/FLAG5879ecac8 [2022-12-13 12:33:03,565 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/data/029dac34c/cef2f4c46c1d43bdbde10c5dd20fd53f [2022-12-13 12:33:03,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:33:03,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:33:03,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:33:03,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:33:03,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:33:03,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70950009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03, skipping insertion in model container [2022-12-13 12:33:03,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:33:03,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:33:03,711 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:33:03,712 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:33:03,715 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:33:03,716 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:33:03,722 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_1f48b7d8-3899-4400-87d7-4aed5dec6761/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-12-13 12:33:03,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:33:03,730 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:33:03,741 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:33:03,742 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:33:03,743 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:33:03,743 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:33:03,748 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_1f48b7d8-3899-4400-87d7-4aed5dec6761/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-12-13 12:33:03,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:33:03,758 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:33:03,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03 WrapperNode [2022-12-13 12:33:03,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:33:03,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:33:03,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:33:03,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:33:03,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,790 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 82 [2022-12-13 12:33:03,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:33:03,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:33:03,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:33:03,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:33:03,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,811 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:33:03,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:33:03,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:33:03,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:33:03,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (1/1) ... [2022-12-13 12:33:03,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:33:03,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:03,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:33:03,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:33:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:33:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 12:33:03,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 12:33:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 12:33:03,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 12:33:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:33:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:33:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:33:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 12:33:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 12:33:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:33:03,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:33:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:33:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:33:03,880 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 12:33:03,957 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:33:03,959 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:33:04,130 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:33:04,183 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:33:04,183 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 12:33:04,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:33:04 BoogieIcfgContainer [2022-12-13 12:33:04,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:33:04,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:33:04,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:33:04,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:33:04,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:33:03" (1/3) ... [2022-12-13 12:33:04,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f9a6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:33:04, skipping insertion in model container [2022-12-13 12:33:04,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:03" (2/3) ... [2022-12-13 12:33:04,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f9a6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:33:04, skipping insertion in model container [2022-12-13 12:33:04,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:33:04" (3/3) ... [2022-12-13 12:33:04,192 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-12-13 12:33:04,199 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 12:33:04,206 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:33:04,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 12:33:04,207 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:33:04,281 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 12:33:04,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 104 transitions, 224 flow [2022-12-13 12:33:04,358 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2022-12-13 12:33:04,358 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 12:33:04,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 6/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 93 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-12-13 12:33:04,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 104 transitions, 224 flow [2022-12-13 12:33:04,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 84 transitions, 180 flow [2022-12-13 12:33:04,369 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:33:04,377 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 84 transitions, 180 flow [2022-12-13 12:33:04,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 84 transitions, 180 flow [2022-12-13 12:33:04,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 84 transitions, 180 flow [2022-12-13 12:33:04,399 INFO L130 PetriNetUnfolder]: 5/84 cut-off events. [2022-12-13 12:33:04,399 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 12:33:04,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 5/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-12-13 12:33:04,401 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2022-12-13 12:33:06,394 INFO L134 LiptonReduction]: Checked pairs total: 1168 [2022-12-13 12:33:06,394 INFO L136 LiptonReduction]: Total number of compositions: 78 [2022-12-13 12:33:06,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:33:06,414 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;@57f48dce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:33:06,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-13 12:33:06,417 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 12:33:06,417 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:33:06,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:06,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 12:33:06,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:06,423 INFO L85 PathProgramCache]: Analyzing trace with hash 12756423, now seen corresponding path program 1 times [2022-12-13 12:33:06,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:06,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965447774] [2022-12-13 12:33:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:06,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:06,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965447774] [2022-12-13 12:33:06,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965447774] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:06,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:33:06,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:33:06,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948262018] [2022-12-13 12:33:06,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:06,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:33:06,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:06,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:33:06,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:33:06,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2022-12-13 12:33:06,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:06,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:06,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2022-12-13 12:33:06,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:06,754 INFO L130 PetriNetUnfolder]: 215/337 cut-off events. [2022-12-13 12:33:06,754 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-13 12:33:06,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 337 events. 215/337 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 1253 event pairs, 41 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 595. Up to 306 conditions per place. [2022-12-13 12:33:06,758 INFO L137 encePairwiseOnDemand]: 171/182 looper letters, 30 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2022-12-13 12:33:06,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 161 flow [2022-12-13 12:33:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:33:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:33:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2022-12-13 12:33:06,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5604395604395604 [2022-12-13 12:33:06,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2022-12-13 12:33:06,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2022-12-13 12:33:06,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:06,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2022-12-13 12:33:06,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:06,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:06,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:06,784 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 306 transitions. [2022-12-13 12:33:06,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 161 flow [2022-12-13 12:33:06,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:33:06,788 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 86 flow [2022-12-13 12:33:06,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2022-12-13 12:33:06,793 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2022-12-13 12:33:06,793 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 86 flow [2022-12-13 12:33:06,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:06,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:06,794 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:33:06,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:33:06,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:06,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash 395451070, now seen corresponding path program 1 times [2022-12-13 12:33:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:06,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315368151] [2022-12-13 12:33:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:06,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:06,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315368151] [2022-12-13 12:33:06,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315368151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:06,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903731739] [2022-12-13 12:33:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:06,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:06,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:06,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:06,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:33:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:06,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:33:06,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:06,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:06,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903731739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:06,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:33:06,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 12:33:06,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20642866] [2022-12-13 12:33:06,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:06,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:33:06,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:06,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:33:06,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:33:06,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 182 [2022-12-13 12:33:06,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:06,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:06,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 182 [2022-12-13 12:33:06,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:07,224 INFO L130 PetriNetUnfolder]: 636/975 cut-off events. [2022-12-13 12:33:07,224 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-12-13 12:33:07,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 975 events. 636/975 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 4837 event pairs, 80 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 922. Up to 588 conditions per place. [2022-12-13 12:33:07,231 INFO L137 encePairwiseOnDemand]: 178/182 looper letters, 86 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2022-12-13 12:33:07,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 96 transitions, 479 flow [2022-12-13 12:33:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:33:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:33:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 709 transitions. [2022-12-13 12:33:07,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5565149136577708 [2022-12-13 12:33:07,236 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 709 transitions. [2022-12-13 12:33:07,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 709 transitions. [2022-12-13 12:33:07,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:07,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 709 transitions. [2022-12-13 12:33:07,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 101.28571428571429) internal successors, (709), 7 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,244 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,244 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 86 flow. Second operand 7 states and 709 transitions. [2022-12-13 12:33:07,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 96 transitions, 479 flow [2022-12-13 12:33:07,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 96 transitions, 477 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:07,246 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 133 flow [2022-12-13 12:33:07,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=133, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2022-12-13 12:33:07,247 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2022-12-13 12:33:07,247 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 133 flow [2022-12-13 12:33:07,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:07,248 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 12:33:07,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:33:07,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 12:33:07,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:07,449 INFO L85 PathProgramCache]: Analyzing trace with hash -625918328, now seen corresponding path program 1 times [2022-12-13 12:33:07,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:07,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241042718] [2022-12-13 12:33:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:07,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:33:07,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:07,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241042718] [2022-12-13 12:33:07,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241042718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:07,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:33:07,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:33:07,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488267785] [2022-12-13 12:33:07,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:07,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:33:07,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:33:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:33:07,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 182 [2022-12-13 12:33:07,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:07,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 182 [2022-12-13 12:33:07,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:07,595 INFO L130 PetriNetUnfolder]: 577/902 cut-off events. [2022-12-13 12:33:07,595 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2022-12-13 12:33:07,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2508 conditions, 902 events. 577/902 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4354 event pairs, 161 based on Foata normal form. 28/616 useless extension candidates. Maximal degree in co-relation 1168. Up to 893 conditions per place. [2022-12-13 12:33:07,601 INFO L137 encePairwiseOnDemand]: 180/182 looper letters, 28 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 12:33:07,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 173 flow [2022-12-13 12:33:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:33:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:33:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2022-12-13 12:33:07,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2022-12-13 12:33:07,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2022-12-13 12:33:07,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2022-12-13 12:33:07,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:07,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2022-12-13 12:33:07,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,611 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 133 flow. Second operand 3 states and 287 transitions. [2022-12-13 12:33:07,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 173 flow [2022-12-13 12:33:07,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:07,613 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 106 flow [2022-12-13 12:33:07,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2022-12-13 12:33:07,614 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2022-12-13 12:33:07,614 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 106 flow [2022-12-13 12:33:07,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:07,615 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:33:07,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 12:33:07,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash 395451021, now seen corresponding path program 1 times [2022-12-13 12:33:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:07,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211108765] [2022-12-13 12:33:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:07,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:07,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:07,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211108765] [2022-12-13 12:33:07,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211108765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:07,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703964403] [2022-12-13 12:33:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:07,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:07,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:07,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:07,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:33:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:07,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:33:07,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:07,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:07,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703964403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:07,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:33:07,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 12:33:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006103300] [2022-12-13 12:33:07,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:07,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:33:07,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:33:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:33:07,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2022-12-13 12:33:07,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 89.57142857142857) internal successors, (627), 7 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:07,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:07,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2022-12-13 12:33:07,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:07,978 INFO L130 PetriNetUnfolder]: 681/1214 cut-off events. [2022-12-13 12:33:07,978 INFO L131 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2022-12-13 12:33:07,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 1214 events. 681/1214 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6622 event pairs, 89 based on Foata normal form. 72/1051 useless extension candidates. Maximal degree in co-relation 3360. Up to 579 conditions per place. [2022-12-13 12:33:07,993 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 65 selfloop transitions, 29 changer transitions 0/96 dead transitions. [2022-12-13 12:33:07,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 96 transitions, 552 flow [2022-12-13 12:33:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:33:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:33:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 716 transitions. [2022-12-13 12:33:07,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5620094191522763 [2022-12-13 12:33:07,995 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 716 transitions. [2022-12-13 12:33:07,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 716 transitions. [2022-12-13 12:33:07,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:07,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 716 transitions. [2022-12-13 12:33:07,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 102.28571428571429) internal successors, (716), 7 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,002 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,002 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 106 flow. Second operand 7 states and 716 transitions. [2022-12-13 12:33:08,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 96 transitions, 552 flow [2022-12-13 12:33:08,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 96 transitions, 551 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:08,005 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 407 flow [2022-12-13 12:33:08,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=407, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2022-12-13 12:33:08,006 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2022-12-13 12:33:08,007 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 407 flow [2022-12-13 12:33:08,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 89.57142857142857) internal successors, (627), 7 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:08,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:33:08,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:33:08,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:08,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash 395451020, now seen corresponding path program 1 times [2022-12-13 12:33:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:08,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528646078] [2022-12-13 12:33:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:08,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:08,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528646078] [2022-12-13 12:33:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528646078] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196778444] [2022-12-13 12:33:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:08,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:08,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:08,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:08,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:33:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:08,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:33:08,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:08,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:33:08,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196778444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:08,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:33:08,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-12-13 12:33:08,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111287268] [2022-12-13 12:33:08,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:08,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:33:08,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:33:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:33:08,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2022-12-13 12:33:08,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 407 flow. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:08,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2022-12-13 12:33:08,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:08,489 INFO L130 PetriNetUnfolder]: 737/1340 cut-off events. [2022-12-13 12:33:08,489 INFO L131 PetriNetUnfolder]: For 2397/2397 co-relation queries the response was YES. [2022-12-13 12:33:08,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5500 conditions, 1340 events. 737/1340 cut-off events. For 2397/2397 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7609 event pairs, 129 based on Foata normal form. 118/1203 useless extension candidates. Maximal degree in co-relation 5478. Up to 672 conditions per place. [2022-12-13 12:33:08,496 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 40 selfloop transitions, 24 changer transitions 0/66 dead transitions. [2022-12-13 12:33:08,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 66 transitions, 656 flow [2022-12-13 12:33:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:33:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:33:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2022-12-13 12:33:08,498 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2022-12-13 12:33:08,498 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2022-12-13 12:33:08,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2022-12-13 12:33:08,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:08,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2022-12-13 12:33:08,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,501 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,502 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 407 flow. Second operand 4 states and 390 transitions. [2022-12-13 12:33:08,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 66 transitions, 656 flow [2022-12-13 12:33:08,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 66 transitions, 588 flow, removed 34 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:08,518 INFO L231 Difference]: Finished difference. Result has 46 places, 56 transitions, 554 flow [2022-12-13 12:33:08,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=46, PETRI_TRANSITIONS=56} [2022-12-13 12:33:08,518 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2022-12-13 12:33:08,519 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 56 transitions, 554 flow [2022-12-13 12:33:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:08,519 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:08,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:33:08,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:08,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:08,721 INFO L85 PathProgramCache]: Analyzing trace with hash -220674777, now seen corresponding path program 1 times [2022-12-13 12:33:08,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:08,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253001934] [2022-12-13 12:33:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:08,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:08,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:08,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253001934] [2022-12-13 12:33:08,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253001934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:08,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:33:08,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:33:08,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996716901] [2022-12-13 12:33:08,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:08,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:33:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:08,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:33:08,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:33:08,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 182 [2022-12-13 12:33:08,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 56 transitions, 554 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:08,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:08,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 182 [2022-12-13 12:33:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:09,027 INFO L130 PetriNetUnfolder]: 725/1356 cut-off events. [2022-12-13 12:33:09,027 INFO L131 PetriNetUnfolder]: For 2955/2955 co-relation queries the response was YES. [2022-12-13 12:33:09,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5659 conditions, 1356 events. 725/1356 cut-off events. For 2955/2955 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7731 event pairs, 375 based on Foata normal form. 0/1129 useless extension candidates. Maximal degree in co-relation 5634. Up to 1157 conditions per place. [2022-12-13 12:33:09,034 INFO L137 encePairwiseOnDemand]: 178/182 looper letters, 70 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2022-12-13 12:33:09,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 75 transitions, 844 flow [2022-12-13 12:33:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:33:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:33:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2022-12-13 12:33:09,036 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5421245421245421 [2022-12-13 12:33:09,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2022-12-13 12:33:09,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2022-12-13 12:33:09,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:09,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2022-12-13 12:33:09,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:09,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:09,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:09,039 INFO L175 Difference]: Start difference. First operand has 46 places, 56 transitions, 554 flow. Second operand 3 states and 296 transitions. [2022-12-13 12:33:09,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 75 transitions, 844 flow [2022-12-13 12:33:09,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 75 transitions, 771 flow, removed 36 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:09,046 INFO L231 Difference]: Finished difference. Result has 48 places, 59 transitions, 559 flow [2022-12-13 12:33:09,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=559, PETRI_PLACES=48, PETRI_TRANSITIONS=59} [2022-12-13 12:33:09,047 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2022-12-13 12:33:09,047 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 59 transitions, 559 flow [2022-12-13 12:33:09,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:09,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:09,047 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 12:33:09,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 12:33:09,048 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash -212062456, now seen corresponding path program 2 times [2022-12-13 12:33:09,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:09,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143434963] [2022-12-13 12:33:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:09,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:09,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143434963] [2022-12-13 12:33:09,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143434963] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:09,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429204406] [2022-12-13 12:33:09,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:33:09,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:09,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:09,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:09,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:33:09,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:33:09,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:09,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 12:33:09,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:09,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:09,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429204406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:09,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:33:09,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 12:33:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438009691] [2022-12-13 12:33:09,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:09,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:33:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:09,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:33:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:33:09,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2022-12-13 12:33:09,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 59 transitions, 559 flow. Second operand has 13 states, 13 states have (on average 89.3076923076923) internal successors, (1161), 13 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:09,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:09,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2022-12-13 12:33:09,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:09,721 INFO L130 PetriNetUnfolder]: 1801/3351 cut-off events. [2022-12-13 12:33:09,722 INFO L131 PetriNetUnfolder]: For 8292/8366 co-relation queries the response was YES. [2022-12-13 12:33:09,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12991 conditions, 3351 events. 1801/3351 cut-off events. For 8292/8366 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22597 event pairs, 203 based on Foata normal form. 456/3051 useless extension candidates. Maximal degree in co-relation 12965. Up to 831 conditions per place. [2022-12-13 12:33:09,738 INFO L137 encePairwiseOnDemand]: 174/182 looper letters, 133 selfloop transitions, 132 changer transitions 0/267 dead transitions. [2022-12-13 12:33:09,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 267 transitions, 2392 flow [2022-12-13 12:33:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:33:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:33:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1245 transitions. [2022-12-13 12:33:09,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.570054945054945 [2022-12-13 12:33:09,741 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1245 transitions. [2022-12-13 12:33:09,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1245 transitions. [2022-12-13 12:33:09,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:09,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1245 transitions. [2022-12-13 12:33:09,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 103.75) internal successors, (1245), 12 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:09,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 182.0) internal successors, (2366), 13 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:09,746 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 182.0) internal successors, (2366), 13 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:09,746 INFO L175 Difference]: Start difference. First operand has 48 places, 59 transitions, 559 flow. Second operand 12 states and 1245 transitions. [2022-12-13 12:33:09,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 267 transitions, 2392 flow [2022-12-13 12:33:09,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 267 transitions, 2381 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:09,758 INFO L231 Difference]: Finished difference. Result has 68 places, 167 transitions, 2250 flow [2022-12-13 12:33:09,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2250, PETRI_PLACES=68, PETRI_TRANSITIONS=167} [2022-12-13 12:33:09,759 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2022-12-13 12:33:09,759 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 167 transitions, 2250 flow [2022-12-13 12:33:09,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 89.3076923076923) internal successors, (1161), 13 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:09,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:09,760 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 12:33:09,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:33:09,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 12:33:09,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:09,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash -212062407, now seen corresponding path program 2 times [2022-12-13 12:33:09,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298734375] [2022-12-13 12:33:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:09,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:10,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:10,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298734375] [2022-12-13 12:33:10,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298734375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:10,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963625615] [2022-12-13 12:33:10,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:33:10,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:10,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:10,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:10,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:33:10,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:33:10,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:10,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:33:10,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 12:33:10,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:33:10,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963625615] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:10,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:33:10,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-12-13 12:33:10,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286922099] [2022-12-13 12:33:10,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:10,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:33:10,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:33:10,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:33:10,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 182 [2022-12-13 12:33:10,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 167 transitions, 2250 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:10,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:10,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 182 [2022-12-13 12:33:10,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:10,382 INFO L130 PetriNetUnfolder]: 1421/2708 cut-off events. [2022-12-13 12:33:10,382 INFO L131 PetriNetUnfolder]: For 10434/10493 co-relation queries the response was YES. [2022-12-13 12:33:10,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12390 conditions, 2708 events. 1421/2708 cut-off events. For 10434/10493 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18175 event pairs, 919 based on Foata normal form. 131/2375 useless extension candidates. Maximal degree in co-relation 12353. Up to 2704 conditions per place. [2022-12-13 12:33:10,401 INFO L137 encePairwiseOnDemand]: 180/182 looper letters, 136 selfloop transitions, 1 changer transitions 0/139 dead transitions. [2022-12-13 12:33:10,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 139 transitions, 2156 flow [2022-12-13 12:33:10,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:33:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:33:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2022-12-13 12:33:10,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2022-12-13 12:33:10,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2022-12-13 12:33:10,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2022-12-13 12:33:10,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:10,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2022-12-13 12:33:10,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:10,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:10,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:10,404 INFO L175 Difference]: Start difference. First operand has 68 places, 167 transitions, 2250 flow. Second operand 3 states and 280 transitions. [2022-12-13 12:33:10,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 139 transitions, 2156 flow [2022-12-13 12:33:10,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 139 transitions, 1886 flow, removed 123 selfloop flow, removed 3 redundant places. [2022-12-13 12:33:10,441 INFO L231 Difference]: Finished difference. Result has 66 places, 139 transitions, 1614 flow [2022-12-13 12:33:10,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1614, PETRI_PLACES=66, PETRI_TRANSITIONS=139} [2022-12-13 12:33:10,442 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2022-12-13 12:33:10,442 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 139 transitions, 1614 flow [2022-12-13 12:33:10,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:10,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:10,443 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:10,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:33:10,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:10,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2096921194, now seen corresponding path program 1 times [2022-12-13 12:33:10,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:10,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821330647] [2022-12-13 12:33:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:10,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:10,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821330647] [2022-12-13 12:33:10,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821330647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988200688] [2022-12-13 12:33:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:10,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:10,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:10,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:33:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:33:10,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:10,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:10,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988200688] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:10,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:33:10,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 12:33:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196605810] [2022-12-13 12:33:10,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:33:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:33:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:33:10,874 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 182 [2022-12-13 12:33:10,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 139 transitions, 1614 flow. Second operand has 7 states, 7 states have (on average 89.28571428571429) internal successors, (625), 7 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:10,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:10,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 182 [2022-12-13 12:33:10,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:11,502 INFO L130 PetriNetUnfolder]: 2853/5096 cut-off events. [2022-12-13 12:33:11,502 INFO L131 PetriNetUnfolder]: For 16516/16516 co-relation queries the response was YES. [2022-12-13 12:33:11,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21123 conditions, 5096 events. 2853/5096 cut-off events. For 16516/16516 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33612 event pairs, 703 based on Foata normal form. 0/4261 useless extension candidates. Maximal degree in co-relation 21093. Up to 1615 conditions per place. [2022-12-13 12:33:11,520 INFO L137 encePairwiseOnDemand]: 178/182 looper letters, 262 selfloop transitions, 157 changer transitions 0/420 dead transitions. [2022-12-13 12:33:11,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 420 transitions, 5482 flow [2022-12-13 12:33:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:33:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:33:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 688 transitions. [2022-12-13 12:33:11,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5400313971742543 [2022-12-13 12:33:11,523 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 688 transitions. [2022-12-13 12:33:11,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 688 transitions. [2022-12-13 12:33:11,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:11,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 688 transitions. [2022-12-13 12:33:11,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.28571428571429) internal successors, (688), 7 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:11,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:11,528 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:11,528 INFO L175 Difference]: Start difference. First operand has 66 places, 139 transitions, 1614 flow. Second operand 7 states and 688 transitions. [2022-12-13 12:33:11,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 420 transitions, 5482 flow [2022-12-13 12:33:11,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 420 transitions, 5461 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:11,600 INFO L231 Difference]: Finished difference. Result has 74 places, 263 transitions, 3666 flow [2022-12-13 12:33:11,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3666, PETRI_PLACES=74, PETRI_TRANSITIONS=263} [2022-12-13 12:33:11,601 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2022-12-13 12:33:11,601 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 263 transitions, 3666 flow [2022-12-13 12:33:11,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 89.28571428571429) internal successors, (625), 7 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:11,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:11,601 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:11,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:33:11,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:11,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash 659590094, now seen corresponding path program 1 times [2022-12-13 12:33:11,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:11,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079411138] [2022-12-13 12:33:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:11,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:33:11,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079411138] [2022-12-13 12:33:11,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079411138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079408732] [2022-12-13 12:33:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:11,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:11,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:11,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:11,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:33:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:11,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:33:11,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:33:11,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:33:11,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079408732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:11,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:33:11,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 12:33:11,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724431421] [2022-12-13 12:33:11,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:11,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:33:11,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:33:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:33:11,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 182 [2022-12-13 12:33:11,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 263 transitions, 3666 flow. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:11,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:11,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 182 [2022-12-13 12:33:11,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:12,558 INFO L130 PetriNetUnfolder]: 2213/4242 cut-off events. [2022-12-13 12:33:12,558 INFO L131 PetriNetUnfolder]: For 25410/25410 co-relation queries the response was YES. [2022-12-13 12:33:12,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17882 conditions, 4242 events. 2213/4242 cut-off events. For 25410/25410 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 29340 event pairs, 640 based on Foata normal form. 272/4395 useless extension candidates. Maximal degree in co-relation 17849. Up to 3686 conditions per place. [2022-12-13 12:33:12,574 INFO L137 encePairwiseOnDemand]: 179/182 looper letters, 200 selfloop transitions, 11 changer transitions 0/212 dead transitions. [2022-12-13 12:33:12,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 212 transitions, 3161 flow [2022-12-13 12:33:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:33:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:33:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 385 transitions. [2022-12-13 12:33:12,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2022-12-13 12:33:12,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 385 transitions. [2022-12-13 12:33:12,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 385 transitions. [2022-12-13 12:33:12,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:12,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 385 transitions. [2022-12-13 12:33:12,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:12,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:12,577 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:12,577 INFO L175 Difference]: Start difference. First operand has 74 places, 263 transitions, 3666 flow. Second operand 4 states and 385 transitions. [2022-12-13 12:33:12,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 212 transitions, 3161 flow [2022-12-13 12:33:12,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 212 transitions, 3074 flow, removed 38 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:12,624 INFO L231 Difference]: Finished difference. Result has 74 places, 179 transitions, 2411 flow [2022-12-13 12:33:12,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2411, PETRI_PLACES=74, PETRI_TRANSITIONS=179} [2022-12-13 12:33:12,625 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2022-12-13 12:33:12,625 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 179 transitions, 2411 flow [2022-12-13 12:33:12,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:12,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:12,625 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:12,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 12:33:12,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 12:33:12,826 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:12,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:12,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1338640930, now seen corresponding path program 1 times [2022-12-13 12:33:12,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:12,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034716992] [2022-12-13 12:33:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:12,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:12,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034716992] [2022-12-13 12:33:12,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034716992] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:12,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:33:12,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:33:12,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112365300] [2022-12-13 12:33:12,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:12,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:33:12,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:12,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:33:12,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:33:12,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 182 [2022-12-13 12:33:12,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 179 transitions, 2411 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:12,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:12,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 182 [2022-12-13 12:33:12,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:13,445 INFO L130 PetriNetUnfolder]: 2122/3975 cut-off events. [2022-12-13 12:33:13,446 INFO L131 PetriNetUnfolder]: For 21694/21812 co-relation queries the response was YES. [2022-12-13 12:33:13,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16922 conditions, 3975 events. 2122/3975 cut-off events. For 21694/21812 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 27312 event pairs, 1424 based on Foata normal form. 118/4079 useless extension candidates. Maximal degree in co-relation 16888. Up to 3971 conditions per place. [2022-12-13 12:33:13,465 INFO L137 encePairwiseOnDemand]: 180/182 looper letters, 175 selfloop transitions, 1 changer transitions 0/178 dead transitions. [2022-12-13 12:33:13,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 178 transitions, 2761 flow [2022-12-13 12:33:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:33:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:33:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-12-13 12:33:13,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2022-12-13 12:33:13,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-12-13 12:33:13,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-12-13 12:33:13,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:13,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-12-13 12:33:13,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:13,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:13,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:13,468 INFO L175 Difference]: Start difference. First operand has 74 places, 179 transitions, 2411 flow. Second operand 3 states and 272 transitions. [2022-12-13 12:33:13,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 178 transitions, 2761 flow [2022-12-13 12:33:13,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 178 transitions, 2749 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:33:13,513 INFO L231 Difference]: Finished difference. Result has 73 places, 178 transitions, 2399 flow [2022-12-13 12:33:13,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2399, PETRI_PLACES=73, PETRI_TRANSITIONS=178} [2022-12-13 12:33:13,514 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2022-12-13 12:33:13,514 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 178 transitions, 2399 flow [2022-12-13 12:33:13,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:13,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:13,514 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:13,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 12:33:13,514 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash 938981819, now seen corresponding path program 1 times [2022-12-13 12:33:13,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:13,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203338081] [2022-12-13 12:33:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:13,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:13,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:13,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203338081] [2022-12-13 12:33:13,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203338081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:13,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:33:13,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:33:13,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298082773] [2022-12-13 12:33:13,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:13,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:33:13,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:33:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:33:13,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 182 [2022-12-13 12:33:13,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 178 transitions, 2399 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:13,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:13,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 182 [2022-12-13 12:33:13,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:14,057 INFO L130 PetriNetUnfolder]: 2122/3864 cut-off events. [2022-12-13 12:33:14,057 INFO L131 PetriNetUnfolder]: For 21347/21467 co-relation queries the response was YES. [2022-12-13 12:33:14,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16698 conditions, 3864 events. 2122/3864 cut-off events. For 21347/21467 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25547 event pairs, 1424 based on Foata normal form. 231/4085 useless extension candidates. Maximal degree in co-relation 16663. Up to 3860 conditions per place. [2022-12-13 12:33:14,069 INFO L137 encePairwiseOnDemand]: 180/182 looper letters, 173 selfloop transitions, 1 changer transitions 1/177 dead transitions. [2022-12-13 12:33:14,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 177 transitions, 2747 flow [2022-12-13 12:33:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:33:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:33:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2022-12-13 12:33:14,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49633699633699635 [2022-12-13 12:33:14,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2022-12-13 12:33:14,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2022-12-13 12:33:14,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:14,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2022-12-13 12:33:14,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:14,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:14,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:14,072 INFO L175 Difference]: Start difference. First operand has 73 places, 178 transitions, 2399 flow. Second operand 3 states and 271 transitions. [2022-12-13 12:33:14,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 177 transitions, 2747 flow [2022-12-13 12:33:14,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 177 transitions, 2746 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:14,105 INFO L231 Difference]: Finished difference. Result has 73 places, 176 transitions, 2395 flow [2022-12-13 12:33:14,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2395, PETRI_PLACES=73, PETRI_TRANSITIONS=176} [2022-12-13 12:33:14,106 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2022-12-13 12:33:14,106 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 176 transitions, 2395 flow [2022-12-13 12:33:14,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:14,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:14,106 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-12-13 12:33:14,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 12:33:14,106 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:14,107 INFO L85 PathProgramCache]: Analyzing trace with hash -668266264, now seen corresponding path program 3 times [2022-12-13 12:33:14,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:14,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799343282] [2022-12-13 12:33:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:14,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:14,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:14,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799343282] [2022-12-13 12:33:14,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799343282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:14,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111710123] [2022-12-13 12:33:14,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:33:14,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:14,231 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:14,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:33:14,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 12:33:14,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:14,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 12:33:14,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:14,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:14,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111710123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:14,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:33:14,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-12-13 12:33:14,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422175658] [2022-12-13 12:33:14,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:14,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 12:33:14,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 12:33:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 12:33:14,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2022-12-13 12:33:14,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 176 transitions, 2395 flow. Second operand has 25 states, 25 states have (on average 89.16) internal successors, (2229), 25 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:14,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:14,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2022-12-13 12:33:14,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:16,174 INFO L130 PetriNetUnfolder]: 6154/10838 cut-off events. [2022-12-13 12:33:16,174 INFO L131 PetriNetUnfolder]: For 167894/168162 co-relation queries the response was YES. [2022-12-13 12:33:16,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44843 conditions, 10838 events. 6154/10838 cut-off events. For 167894/168162 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 75109 event pairs, 681 based on Foata normal form. 1708/12538 useless extension candidates. Maximal degree in co-relation 44807. Up to 2507 conditions per place. [2022-12-13 12:33:16,222 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 190 selfloop transitions, 506 changer transitions 0/698 dead transitions. [2022-12-13 12:33:16,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 698 transitions, 9013 flow [2022-12-13 12:33:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 12:33:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 12:33:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2390 transitions. [2022-12-13 12:33:16,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5471611721611722 [2022-12-13 12:33:16,226 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2390 transitions. [2022-12-13 12:33:16,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2390 transitions. [2022-12-13 12:33:16,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:16,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2390 transitions. [2022-12-13 12:33:16,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 99.58333333333333) internal successors, (2390), 24 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:16,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 182.0) internal successors, (4550), 25 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:16,237 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 182.0) internal successors, (4550), 25 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:16,237 INFO L175 Difference]: Start difference. First operand has 73 places, 176 transitions, 2395 flow. Second operand 24 states and 2390 transitions. [2022-12-13 12:33:16,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 698 transitions, 9013 flow [2022-12-13 12:33:16,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 698 transitions, 9012 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:16,324 INFO L231 Difference]: Finished difference. Result has 116 places, 544 transitions, 9502 flow [2022-12-13 12:33:16,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=9502, PETRI_PLACES=116, PETRI_TRANSITIONS=544} [2022-12-13 12:33:16,325 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2022-12-13 12:33:16,325 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 544 transitions, 9502 flow [2022-12-13 12:33:16,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 89.16) internal successors, (2229), 25 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:16,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:16,326 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:16,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:33:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 12:33:16,528 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1771825244, now seen corresponding path program 2 times [2022-12-13 12:33:16,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:16,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107108819] [2022-12-13 12:33:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:33:16,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:16,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107108819] [2022-12-13 12:33:16,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107108819] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:16,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980865225] [2022-12-13 12:33:16,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:33:16,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:16,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:16,624 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:16,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:33:16,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:33:16,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:16,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:33:16,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 12:33:16,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:33:16,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980865225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:16,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:33:16,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-12-13 12:33:16,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226604787] [2022-12-13 12:33:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:16,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:33:16,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:33:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:33:16,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 182 [2022-12-13 12:33:16,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 544 transitions, 9502 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:16,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:16,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 182 [2022-12-13 12:33:16,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:18,627 INFO L130 PetriNetUnfolder]: 5306/9333 cut-off events. [2022-12-13 12:33:18,627 INFO L131 PetriNetUnfolder]: For 115713/115977 co-relation queries the response was YES. [2022-12-13 12:33:18,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45054 conditions, 9333 events. 5306/9333 cut-off events. For 115713/115977 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 63682 event pairs, 3644 based on Foata normal form. 886/10215 useless extension candidates. Maximal degree in co-relation 44995. Up to 9329 conditions per place. [2022-12-13 12:33:18,664 INFO L137 encePairwiseOnDemand]: 180/182 looper letters, 440 selfloop transitions, 1 changer transitions 0/443 dead transitions. [2022-12-13 12:33:18,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 443 transitions, 8266 flow [2022-12-13 12:33:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:33:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:33:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2022-12-13 12:33:18,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5036630036630036 [2022-12-13 12:33:18,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2022-12-13 12:33:18,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2022-12-13 12:33:18,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:18,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2022-12-13 12:33:18,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:18,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:18,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:18,667 INFO L175 Difference]: Start difference. First operand has 116 places, 544 transitions, 9502 flow. Second operand 3 states and 275 transitions. [2022-12-13 12:33:18,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 443 transitions, 8266 flow [2022-12-13 12:33:18,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 443 transitions, 6948 flow, removed 426 selfloop flow, removed 8 redundant places. [2022-12-13 12:33:18,932 INFO L231 Difference]: Finished difference. Result has 109 places, 443 transitions, 6068 flow [2022-12-13 12:33:18,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=6066, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6068, PETRI_PLACES=109, PETRI_TRANSITIONS=443} [2022-12-13 12:33:18,933 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 80 predicate places. [2022-12-13 12:33:18,933 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 443 transitions, 6068 flow [2022-12-13 12:33:18,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:18,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:18,933 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2022-12-13 12:33:18,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:33:19,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 12:33:19,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:19,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:19,136 INFO L85 PathProgramCache]: Analyzing trace with hash 153885864, now seen corresponding path program 4 times [2022-12-13 12:33:19,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:19,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974614077] [2022-12-13 12:33:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:19,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:19,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974614077] [2022-12-13 12:33:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974614077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514136862] [2022-12-13 12:33:19,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:33:19,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:19,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:19,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:19,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:33:19,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:33:19,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:19,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 12:33:19,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:19,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:20,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514136862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:20,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:33:20,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-12-13 12:33:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473585124] [2022-12-13 12:33:20,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:20,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 12:33:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 12:33:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 12:33:20,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2022-12-13 12:33:20,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 443 transitions, 6068 flow. Second operand has 49 states, 49 states have (on average 89.08163265306122) internal successors, (4365), 49 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:20,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:20,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2022-12-13 12:33:20,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:25,174 INFO L130 PetriNetUnfolder]: 14606/25640 cut-off events. [2022-12-13 12:33:25,175 INFO L131 PetriNetUnfolder]: For 1254584/1254862 co-relation queries the response was YES. [2022-12-13 12:33:25,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98364 conditions, 25640 events. 14606/25640 cut-off events. For 1254584/1254862 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 184321 event pairs, 1707 based on Foata normal form. 2968/28606 useless extension candidates. Maximal degree in co-relation 98311. Up to 5400 conditions per place. [2022-12-13 12:33:25,305 INFO L137 encePairwiseOnDemand]: 177/182 looper letters, 216 selfloop transitions, 1292 changer transitions 138/1648 dead transitions. [2022-12-13 12:33:25,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 1648 transitions, 19977 flow [2022-12-13 12:33:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 12:33:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 12:33:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4743 transitions. [2022-12-13 12:33:25,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5429258241758241 [2022-12-13 12:33:25,313 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4743 transitions. [2022-12-13 12:33:25,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4743 transitions. [2022-12-13 12:33:25,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:25,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4743 transitions. [2022-12-13 12:33:25,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 98.8125) internal successors, (4743), 48 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:25,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 182.0) internal successors, (8918), 49 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:25,333 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 182.0) internal successors, (8918), 49 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:25,333 INFO L175 Difference]: Start difference. First operand has 109 places, 443 transitions, 6068 flow. Second operand 48 states and 4743 transitions. [2022-12-13 12:33:25,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 1648 transitions, 19977 flow [2022-12-13 12:33:25,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 1648 transitions, 19976 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:33:25,546 INFO L231 Difference]: Finished difference. Result has 201 places, 1326 transitions, 21510 flow [2022-12-13 12:33:25,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=21510, PETRI_PLACES=201, PETRI_TRANSITIONS=1326} [2022-12-13 12:33:25,547 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2022-12-13 12:33:25,547 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 1326 transitions, 21510 flow [2022-12-13 12:33:25,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 89.08163265306122) internal successors, (4365), 49 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:25,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:25,548 INFO L209 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2022-12-13 12:33:25,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 12:33:25,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 12:33:25,749 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:33:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash -104639448, now seen corresponding path program 5 times [2022-12-13 12:33:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:25,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268173939] [2022-12-13 12:33:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:26,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268173939] [2022-12-13 12:33:26,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268173939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134377219] [2022-12-13 12:33:26,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:33:26,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:26,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:26,979 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:26,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:33:27,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 12:33:27,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:27,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 12:33:27,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:27,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:28,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134377219] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:28,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:33:28,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2022-12-13 12:33:28,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566626801] [2022-12-13 12:33:28,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:28,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-13 12:33:28,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-13 12:33:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 12:33:28,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2022-12-13 12:33:28,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 1326 transitions, 21510 flow. Second operand has 97 states, 97 states have (on average 89.04123711340206) internal successors, (8637), 97 states have internal predecessors, (8637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:28,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:28,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2022-12-13 12:33:28,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:58,520 INFO L130 PetriNetUnfolder]: 42626/74732 cut-off events. [2022-12-13 12:33:58,520 INFO L131 PetriNetUnfolder]: For 15216267/15216833 co-relation queries the response was YES. [2022-12-13 12:33:59,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331821 conditions, 74732 events. 42626/74732 cut-off events. For 15216267/15216833 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 576024 event pairs, 4959 based on Foata normal form. 5944/80674 useless extension candidates. Maximal degree in co-relation 331721. Up to 20367 conditions per place. [2022-12-13 12:33:59,481 INFO L137 encePairwiseOnDemand]: 177/182 looper letters, 408 selfloop transitions, 4227 changer transitions 282/4919 dead transitions. [2022-12-13 12:33:59,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 4919 transitions, 76669 flow [2022-12-13 12:33:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 12:33:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-12-13 12:33:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 9495 transitions. [2022-12-13 12:33:59,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5434409340659341 [2022-12-13 12:33:59,489 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 9495 transitions. [2022-12-13 12:33:59,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 9495 transitions. [2022-12-13 12:33:59,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:59,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 9495 transitions. [2022-12-13 12:33:59,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 98.90625) internal successors, (9495), 96 states have internal predecessors, (9495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:59,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 182.0) internal successors, (17654), 97 states have internal predecessors, (17654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:59,513 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 182.0) internal successors, (17654), 97 states have internal predecessors, (17654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:59,514 INFO L175 Difference]: Start difference. First operand has 201 places, 1326 transitions, 21510 flow. Second operand 96 states and 9495 transitions. [2022-12-13 12:33:59,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 4919 transitions, 76669 flow [2022-12-13 12:34:04,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 4919 transitions, 62551 flow, removed 6758 selfloop flow, removed 11 redundant places. [2022-12-13 12:34:04,069 INFO L231 Difference]: Finished difference. Result has 379 places, 4261 transitions, 68899 flow [2022-12-13 12:34:04,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=19168, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=68899, PETRI_PLACES=379, PETRI_TRANSITIONS=4261} [2022-12-13 12:34:04,070 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 350 predicate places. [2022-12-13 12:34:04,070 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 4261 transitions, 68899 flow [2022-12-13 12:34:04,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 89.04123711340206) internal successors, (8637), 97 states have internal predecessors, (8637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:04,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:34:04,071 INFO L209 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2022-12-13 12:34:04,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 12:34:04,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 12:34:04,271 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:34:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:34:04,272 INFO L85 PathProgramCache]: Analyzing trace with hash -377076952, now seen corresponding path program 6 times [2022-12-13 12:34:04,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:34:04,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33910630] [2022-12-13 12:34:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:34:04,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:34:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:34:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:34:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33910630] [2022-12-13 12:34:07,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33910630] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:34:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300444872] [2022-12-13 12:34:07,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:34:07,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:34:07,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:34:07,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:34:07,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:34:07,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2022-12-13 12:34:07,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:34:07,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 12:34:07,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:34:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:07,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:34:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:13,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300444872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:34:13,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:34:13,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2022-12-13 12:34:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473804074] [2022-12-13 12:34:13,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:34:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-13 12:34:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:34:13,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-13 12:34:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-12-13 12:34:14,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2022-12-13 12:34:14,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 4261 transitions, 68899 flow. Second operand has 193 states, 193 states have (on average 89.02072538860104) internal successors, (17181), 193 states have internal predecessors, (17181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:14,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:34:14,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2022-12-13 12:34:14,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:57,284 INFO L130 PetriNetUnfolder]: 135734/237776 cut-off events. [2022-12-13 12:38:57,285 INFO L131 PetriNetUnfolder]: For 133536678/133537820 co-relation queries the response was YES. [2022-12-13 12:39:02,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059874 conditions, 237776 events. 135734/237776 cut-off events. For 133536678/133537820 co-relation queries the response was YES. Maximal size of possible extension queue 1329. Compared 1983192 event pairs, 16083 based on Foata normal form. 11896/249670 useless extension candidates. Maximal degree in co-relation 1059689. Up to 63759 conditions per place. [2022-12-13 12:39:02,998 INFO L137 encePairwiseOnDemand]: 177/182 looper letters, 792 selfloop transitions, 14722 changer transitions 570/16086 dead transitions. [2022-12-13 12:39:02,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 16086 transitions, 261136 flow [2022-12-13 12:39:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-13 12:39:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2022-12-13 12:39:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 18999 transitions. [2022-12-13 12:39:03,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.543698489010989 [2022-12-13 12:39:03,014 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 18999 transitions. [2022-12-13 12:39:03,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 18999 transitions. [2022-12-13 12:39:03,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:39:03,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 18999 transitions. [2022-12-13 12:39:03,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 98.953125) internal successors, (18999), 192 states have internal predecessors, (18999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:03,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 182.0) internal successors, (35126), 193 states have internal predecessors, (35126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:03,059 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 182.0) internal successors, (35126), 193 states have internal predecessors, (35126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:03,059 INFO L175 Difference]: Start difference. First operand has 379 places, 4261 transitions, 68899 flow. Second operand 192 states and 18999 transitions. [2022-12-13 12:39:03,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 16086 transitions, 261136 flow [2022-12-13 12:40:24,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 16086 transitions, 211148 flow, removed 23942 selfloop flow, removed 23 redundant places. [2022-12-13 12:40:25,150 INFO L231 Difference]: Finished difference. Result has 737 places, 14756 transitions, 236374 flow [2022-12-13 12:40:25,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=63279, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=236374, PETRI_PLACES=737, PETRI_TRANSITIONS=14756} [2022-12-13 12:40:25,153 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 708 predicate places. [2022-12-13 12:40:25,153 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 14756 transitions, 236374 flow [2022-12-13 12:40:25,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 89.02072538860104) internal successors, (17181), 193 states have internal predecessors, (17181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:25,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:40:25,155 INFO L209 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2022-12-13 12:40:25,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:40:25,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 12:40:25,355 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 12:40:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:40:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1700667688, now seen corresponding path program 7 times [2022-12-13 12:40:25,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:40:25,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436168776] [2022-12-13 12:40:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:40:25,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:40:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:40:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:40:39,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:40:39,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436168776] [2022-12-13 12:40:39,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436168776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:40:39,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900862955] [2022-12-13 12:40:39,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:40:39,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:40:39,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:40:39,255 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:40:39,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f48b7d8-3899-4400-87d7-4aed5dec6761/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:40:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:40:39,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 193 conjunts are in the unsatisfiable core [2022-12-13 12:40:39,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:40:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:40:39,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:41:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:41:05,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900862955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:41:05,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:41:05,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2022-12-13 12:41:05,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334305023] [2022-12-13 12:41:05,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:41:05,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-13 12:41:05,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:41:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-13 12:41:05,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-12-13 12:41:08,401 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2022-12-13 12:41:08,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 14756 transitions, 236374 flow. Second operand has 385 states, 385 states have (on average 89.01038961038961) internal successors, (34269), 385 states have internal predecessors, (34269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:08,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:41:08,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2022-12-13 12:41:08,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand