./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:23:58,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:23:58,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:23:58,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:23:58,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:23:58,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:23:58,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:23:58,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:23:58,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:23:58,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:23:58,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:23:58,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:23:58,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:23:58,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:23:58,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:23:58,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:23:58,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:23:58,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:23:58,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:23:58,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:23:58,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:23:58,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:23:58,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:23:58,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:23:58,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:23:58,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:23:58,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:23:58,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:23:58,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:23:58,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:23:58,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:23:58,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:23:58,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:23:58,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:23:58,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:23:58,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:23:58,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:23:58,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:23:58,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:23:58,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:23:58,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:23:58,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 18:23:58,513 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:23:58,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:23:58,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:23:58,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:23:58,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:23:58,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:23:58,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:23:58,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:23:58,521 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:23:58,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:23:58,522 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:23:58,523 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:23:58,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:23:58,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:23:58,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:23:58,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:23:58,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:23:58,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:23:58,525 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 18:23:58,525 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:23:58,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:23:58,526 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:23:58,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:23:58,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:23:58,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:23:58,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:23:58,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:23:58,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:23:58,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:23:58,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:23:58,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:23:58,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:23:58,529 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:23:58,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:23:58,530 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:23:58,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:23:58,530 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_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-11-25 18:23:58,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:23:58,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:23:58,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:23:58,881 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:23:58,881 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:23:58,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-25 18:24:02,087 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:24:02,332 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:24:02,333 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-25 18:24:02,342 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/data/7e1d8b6d7/34a18fa8611a4dc19d8b00fa8b9c0b4c/FLAGd10379672 [2022-11-25 18:24:02,368 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/data/7e1d8b6d7/34a18fa8611a4dc19d8b00fa8b9c0b4c [2022-11-25 18:24:02,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:24:02,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:24:02,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:24:02,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:24:02,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:24:02,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acbc0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02, skipping insertion in model container [2022-11-25 18:24:02,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:24:02,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:24:02,611 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:24:02,612 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:24:02,616 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:24:02,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:24:02,626 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_0fa311bb-8d49-48ed-b679-002bdbd35c48/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-25 18:24:02,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:24:02,638 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:24:02,652 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:24:02,653 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:24:02,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:24:02,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:24:02,661 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_0fa311bb-8d49-48ed-b679-002bdbd35c48/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-25 18:24:02,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:24:02,679 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:24:02,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02 WrapperNode [2022-11-25 18:24:02,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:24:02,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:24:02,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:24:02,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:24:02,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,724 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-25 18:24:02,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:24:02,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:24:02,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:24:02,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:24:02,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:24:02,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:24:02,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:24:02,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:24:02,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2022-11-25 18:24:02,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:24:02,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:02,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:24:02,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:24:02,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:24:02,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:24:02,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:24:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:24:02,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:24:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:24:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:24:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:24:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:24:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:24:02,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:24:02,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:24:02,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:24:02,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:24:02,862 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:24:03,003 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:24:03,005 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:24:03,279 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:24:03,453 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:24:03,454 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:24:03,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:24:03 BoogieIcfgContainer [2022-11-25 18:24:03,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:24:03,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:24:03,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:24:03,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:24:03,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:24:02" (1/3) ... [2022-11-25 18:24:03,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724b3962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:24:03, skipping insertion in model container [2022-11-25 18:24:03,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (2/3) ... [2022-11-25 18:24:03,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724b3962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:24:03, skipping insertion in model container [2022-11-25 18:24:03,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:24:03" (3/3) ... [2022-11-25 18:24:03,479 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-11-25 18:24:03,493 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:24:03,505 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:24:03,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 18:24:03,506 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:24:03,619 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:24:03,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 214 flow [2022-11-25 18:24:03,721 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2022-11-25 18:24:03,721 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:24:03,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-11-25 18:24:03,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 99 transitions, 214 flow [2022-11-25 18:24:03,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 79 transitions, 170 flow [2022-11-25 18:24:03,737 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:24:03,755 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 79 transitions, 170 flow [2022-11-25 18:24:03,759 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 79 transitions, 170 flow [2022-11-25 18:24:03,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 79 transitions, 170 flow [2022-11-25 18:24:03,788 INFO L130 PetriNetUnfolder]: 5/79 cut-off events. [2022-11-25 18:24:03,789 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:24:03,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 5/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-11-25 18:24:03,794 INFO L119 LiptonReduction]: Number of co-enabled transitions 772 [2022-11-25 18:24:07,429 INFO L134 LiptonReduction]: Checked pairs total: 942 [2022-11-25 18:24:07,429 INFO L136 LiptonReduction]: Total number of compositions: 73 [2022-11-25 18:24:07,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:24:07,454 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;@2db7289f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:24:07,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-25 18:24:07,458 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-11-25 18:24:07,458 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:24:07,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:07,459 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:24:07,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash 12297859, now seen corresponding path program 1 times [2022-11-25 18:24:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:07,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878170458] [2022-11-25 18:24:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:07,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:07,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:07,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878170458] [2022-11-25 18:24:07,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878170458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:24:07,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:24:07,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:24:07,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139657668] [2022-11-25 18:24:07,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:07,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:24:07,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:07,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:24:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:24:07,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2022-11-25 18:24:07,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:07,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:07,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2022-11-25 18:24:07,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:07,986 INFO L130 PetriNetUnfolder]: 231/357 cut-off events. [2022-11-25 18:24:07,987 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 18:24:07,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 357 events. 231/357 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 1320 event pairs, 39 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 619. Up to 309 conditions per place. [2022-11-25 18:24:07,992 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 31 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2022-11-25 18:24:07,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 165 flow [2022-11-25 18:24:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:24:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:24:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2022-11-25 18:24:08,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2022-11-25 18:24:08,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2022-11-25 18:24:08,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2022-11-25 18:24:08,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:08,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2022-11-25 18:24:08,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:08,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:08,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:08,027 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 285 transitions. [2022-11-25 18:24:08,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 37 transitions, 165 flow [2022-11-25 18:24:08,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 37 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:24:08,033 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 84 flow [2022-11-25 18:24:08,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, 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=84, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2022-11-25 18:24:08,040 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2022-11-25 18:24:08,040 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 84 flow [2022-11-25 18:24:08,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:08,041 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:08,041 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:24:08,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:24:08,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash 12297904, now seen corresponding path program 1 times [2022-11-25 18:24:08,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:08,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499288865] [2022-11-25 18:24:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:08,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:08,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:08,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499288865] [2022-11-25 18:24:08,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499288865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:24:08,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:24:08,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:24:08,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813910351] [2022-11-25 18:24:08,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:08,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:24:08,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:24:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:24:08,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2022-11-25 18:24:08,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:08,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:08,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2022-11-25 18:24:08,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:08,237 INFO L130 PetriNetUnfolder]: 222/355 cut-off events. [2022-11-25 18:24:08,237 INFO L131 PetriNetUnfolder]: For 30/58 co-relation queries the response was YES. [2022-11-25 18:24:08,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 355 events. 222/355 cut-off events. For 30/58 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 1503 event pairs, 92 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 522. Up to 296 conditions per place. [2022-11-25 18:24:08,240 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 32 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-11-25 18:24:08,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 35 transitions, 167 flow [2022-11-25 18:24:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:24:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:24:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2022-11-25 18:24:08,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2022-11-25 18:24:08,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2022-11-25 18:24:08,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2022-11-25 18:24:08,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:08,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2022-11-25 18:24:08,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:08,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:08,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:08,249 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 84 flow. Second operand 3 states and 276 transitions. [2022-11-25 18:24:08,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 35 transitions, 167 flow [2022-11-25 18:24:08,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:24:08,251 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 76 flow [2022-11-25 18:24:08,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2022-11-25 18:24:08,252 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2022-11-25 18:24:08,252 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 76 flow [2022-11-25 18:24:08,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:08,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:08,253 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:24:08,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:24:08,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:08,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:08,255 INFO L85 PathProgramCache]: Analyzing trace with hash 381235414, now seen corresponding path program 1 times [2022-11-25 18:24:08,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:08,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096119513] [2022-11-25 18:24:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:08,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096119513] [2022-11-25 18:24:08,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096119513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:08,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293798287] [2022-11-25 18:24:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:08,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:08,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:08,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:08,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:24:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:08,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:24:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:08,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:24:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:08,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293798287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:24:08,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:24:08,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 18:24:08,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896884217] [2022-11-25 18:24:08,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:24:08,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:24:08,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:08,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:24:08,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:24:08,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2022-11-25 18:24:08,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:08,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:08,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2022-11-25 18:24:08,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:08,981 INFO L130 PetriNetUnfolder]: 660/1006 cut-off events. [2022-11-25 18:24:08,981 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-25 18:24:08,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2554 conditions, 1006 events. 660/1006 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 4857 event pairs, 84 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 686. Up to 503 conditions per place. [2022-11-25 18:24:08,990 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 87 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2022-11-25 18:24:08,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 97 transitions, 475 flow [2022-11-25 18:24:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:24:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:24:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 659 transitions. [2022-11-25 18:24:08,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5473421926910299 [2022-11-25 18:24:08,994 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 659 transitions. [2022-11-25 18:24:08,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 659 transitions. [2022-11-25 18:24:08,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:08,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 659 transitions. [2022-11-25 18:24:08,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.14285714285714) internal successors, (659), 7 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,002 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,002 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 76 flow. Second operand 7 states and 659 transitions. [2022-11-25 18:24:09,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 97 transitions, 475 flow [2022-11-25 18:24:09,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 97 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:24:09,006 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 131 flow [2022-11-25 18:24:09,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=72, 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=131, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2022-11-25 18:24:09,007 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2022-11-25 18:24:09,007 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 131 flow [2022-11-25 18:24:09,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:09,008 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:24:09,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:24:09,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:09,214 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:09,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:09,214 INFO L85 PathProgramCache]: Analyzing trace with hash 381235413, now seen corresponding path program 1 times [2022-11-25 18:24:09,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:09,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668759110] [2022-11-25 18:24:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:09,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:09,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668759110] [2022-11-25 18:24:09,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668759110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:24:09,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:24:09,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:24:09,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707506120] [2022-11-25 18:24:09,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:09,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:24:09,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:09,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:24:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:24:09,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2022-11-25 18:24:09,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:09,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2022-11-25 18:24:09,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:09,473 INFO L130 PetriNetUnfolder]: 601/933 cut-off events. [2022-11-25 18:24:09,473 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2022-11-25 18:24:09,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2497 conditions, 933 events. 601/933 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4566 event pairs, 139 based on Foata normal form. 28/632 useless extension candidates. Maximal degree in co-relation 1201. Up to 920 conditions per place. [2022-11-25 18:24:09,480 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 29 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-11-25 18:24:09,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 175 flow [2022-11-25 18:24:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:24:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:24:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2022-11-25 18:24:09,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5174418604651163 [2022-11-25 18:24:09,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2022-11-25 18:24:09,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2022-11-25 18:24:09,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:09,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2022-11-25 18:24:09,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-11-25 18:24:09,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:09,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:09,487 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 131 flow. Second operand 3 states and 267 transitions. [2022-11-25 18:24:09,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 175 flow [2022-11-25 18:24:09,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:24:09,492 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 104 flow [2022-11-25 18:24:09,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=102, 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=104, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2022-11-25 18:24:09,494 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2022-11-25 18:24:09,494 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 104 flow [2022-11-25 18:24:09,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:09,495 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:24:09,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:24:09,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:09,498 INFO L85 PathProgramCache]: Analyzing trace with hash 381235369, now seen corresponding path program 1 times [2022-11-25 18:24:09,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:09,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841556942] [2022-11-25 18:24:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:09,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:09,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:09,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841556942] [2022-11-25 18:24:09,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841556942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:09,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703661998] [2022-11-25 18:24:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:09,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:09,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:09,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:09,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:24:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:24:09,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:09,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:24:09,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703661998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:24:09,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:24:09,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-25 18:24:09,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323132677] [2022-11-25 18:24:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:24:09,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:24:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:24:09,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2022-11-25 18:24:09,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:09,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2022-11-25 18:24:09,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:09,973 INFO L130 PetriNetUnfolder]: 674/1077 cut-off events. [2022-11-25 18:24:09,973 INFO L131 PetriNetUnfolder]: For 332/332 co-relation queries the response was YES. [2022-11-25 18:24:09,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2889 conditions, 1077 events. 674/1077 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 5402 event pairs, 112 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 2873. Up to 566 conditions per place. [2022-11-25 18:24:09,982 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 31 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2022-11-25 18:24:09,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 266 flow [2022-11-25 18:24:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:24:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:24:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 362 transitions. [2022-11-25 18:24:09,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5261627906976745 [2022-11-25 18:24:09,985 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 362 transitions. [2022-11-25 18:24:09,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 362 transitions. [2022-11-25 18:24:09,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:09,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 362 transitions. [2022-11-25 18:24:09,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,991 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:09,991 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 104 flow. Second operand 4 states and 362 transitions. [2022-11-25 18:24:09,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 266 flow [2022-11-25 18:24:09,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:24:09,997 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 223 flow [2022-11-25 18:24:09,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2022-11-25 18:24:10,001 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2022-11-25 18:24:10,001 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 223 flow [2022-11-25 18:24:10,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:10,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:10,002 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:24:10,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 18:24:10,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:10,208 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:10,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:10,209 INFO L85 PathProgramCache]: Analyzing trace with hash 381235370, now seen corresponding path program 1 times [2022-11-25 18:24:10,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:10,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848896303] [2022-11-25 18:24:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:10,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:10,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:10,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848896303] [2022-11-25 18:24:10,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848896303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:10,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711129585] [2022-11-25 18:24:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:10,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:10,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:10,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:10,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:24:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:24:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:10,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:24:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:10,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711129585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:24:10,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:24:10,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 18:24:10,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383535000] [2022-11-25 18:24:10,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:24:10,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:24:10,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:10,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:24:10,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:24:10,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2022-11-25 18:24:10,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 223 flow. Second operand has 7 states, 7 states have (on average 82.57142857142857) internal successors, (578), 7 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:10,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:10,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2022-11-25 18:24:10,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:10,830 INFO L130 PetriNetUnfolder]: 809/1424 cut-off events. [2022-11-25 18:24:10,830 INFO L131 PetriNetUnfolder]: For 1885/1885 co-relation queries the response was YES. [2022-11-25 18:24:10,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4903 conditions, 1424 events. 809/1424 cut-off events. For 1885/1885 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7787 event pairs, 90 based on Foata normal form. 276/1551 useless extension candidates. Maximal degree in co-relation 4884. Up to 522 conditions per place. [2022-11-25 18:24:10,843 INFO L137 encePairwiseOnDemand]: 164/172 looper letters, 81 selfloop transitions, 34 changer transitions 0/117 dead transitions. [2022-11-25 18:24:10,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 117 transitions, 871 flow [2022-11-25 18:24:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:24:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:24:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 666 transitions. [2022-11-25 18:24:10,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.553156146179402 [2022-11-25 18:24:10,848 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 666 transitions. [2022-11-25 18:24:10,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 666 transitions. [2022-11-25 18:24:10,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:10,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 666 transitions. [2022-11-25 18:24:10,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.14285714285714) internal successors, (666), 7 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:10,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:10,856 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:10,856 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 223 flow. Second operand 7 states and 666 transitions. [2022-11-25 18:24:10,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 117 transitions, 871 flow [2022-11-25 18:24:10,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 117 transitions, 822 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-11-25 18:24:10,867 INFO L231 Difference]: Finished difference. Result has 47 places, 61 transitions, 618 flow [2022-11-25 18:24:10,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=47, PETRI_TRANSITIONS=61} [2022-11-25 18:24:10,870 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2022-11-25 18:24:10,871 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 61 transitions, 618 flow [2022-11-25 18:24:10,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.57142857142857) internal successors, (578), 7 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:10,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:10,872 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:24:10,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:24:11,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:11,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1491042912, now seen corresponding path program 1 times [2022-11-25 18:24:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:11,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577205366] [2022-11-25 18:24:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:11,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:11,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:11,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577205366] [2022-11-25 18:24:11,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577205366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:24:11,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:24:11,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:24:11,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330743365] [2022-11-25 18:24:11,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:11,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:24:11,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:24:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:24:11,141 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2022-11-25 18:24:11,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 61 transitions, 618 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:11,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:11,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2022-11-25 18:24:11,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:11,449 INFO L130 PetriNetUnfolder]: 841/1553 cut-off events. [2022-11-25 18:24:11,450 INFO L131 PetriNetUnfolder]: For 2991/2991 co-relation queries the response was YES. [2022-11-25 18:24:11,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5987 conditions, 1553 events. 841/1553 cut-off events. For 2991/2991 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8936 event pairs, 427 based on Foata normal form. 6/1389 useless extension candidates. Maximal degree in co-relation 5962. Up to 1354 conditions per place. [2022-11-25 18:24:11,464 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 75 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2022-11-25 18:24:11,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 81 transitions, 918 flow [2022-11-25 18:24:11,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:24:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:24:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2022-11-25 18:24:11,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2022-11-25 18:24:11,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2022-11-25 18:24:11,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2022-11-25 18:24:11,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:11,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2022-11-25 18:24:11,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:11,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:11,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:11,470 INFO L175 Difference]: Start difference. First operand has 47 places, 61 transitions, 618 flow. Second operand 3 states and 278 transitions. [2022-11-25 18:24:11,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 81 transitions, 918 flow [2022-11-25 18:24:11,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 81 transitions, 854 flow, removed 32 selfloop flow, removed 0 redundant places. [2022-11-25 18:24:11,491 INFO L231 Difference]: Finished difference. Result has 50 places, 65 transitions, 635 flow [2022-11-25 18:24:11,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=635, PETRI_PLACES=50, PETRI_TRANSITIONS=65} [2022-11-25 18:24:11,492 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2022-11-25 18:24:11,492 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 65 transitions, 635 flow [2022-11-25 18:24:11,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:11,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:11,493 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 18:24:11,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:24:11,493 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:11,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1491075120, now seen corresponding path program 2 times [2022-11-25 18:24:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:11,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629673187] [2022-11-25 18:24:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:11,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:11,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:11,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629673187] [2022-11-25 18:24:11,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629673187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:11,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040022183] [2022-11-25 18:24:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:24:11,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:11,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:11,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:11,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:24:11,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:24:11,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:24:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:24:11,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:24:11,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:24:11,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040022183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:24:11,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:24:11,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-11-25 18:24:11,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993259012] [2022-11-25 18:24:11,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:11,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:24:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:24:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:24:11,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2022-11-25 18:24:11,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 65 transitions, 635 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:11,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:11,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2022-11-25 18:24:11,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:11,974 INFO L130 PetriNetUnfolder]: 699/1314 cut-off events. [2022-11-25 18:24:11,975 INFO L131 PetriNetUnfolder]: For 3034/3066 co-relation queries the response was YES. [2022-11-25 18:24:11,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5070 conditions, 1314 events. 699/1314 cut-off events. For 3034/3066 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7637 event pairs, 435 based on Foata normal form. 72/1232 useless extension candidates. Maximal degree in co-relation 5043. Up to 1310 conditions per place. [2022-11-25 18:24:11,987 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 54 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-11-25 18:24:11,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 648 flow [2022-11-25 18:24:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:24:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:24:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-11-25 18:24:11,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.501937984496124 [2022-11-25 18:24:11,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2022-11-25 18:24:11,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2022-11-25 18:24:11,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:11,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2022-11-25 18:24:11,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:11,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:11,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:11,995 INFO L175 Difference]: Start difference. First operand has 50 places, 65 transitions, 635 flow. Second operand 3 states and 259 transitions. [2022-11-25 18:24:11,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 648 flow [2022-11-25 18:24:12,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 620 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:24:12,010 INFO L231 Difference]: Finished difference. Result has 47 places, 57 transitions, 512 flow [2022-11-25 18:24:12,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=512, PETRI_PLACES=47, PETRI_TRANSITIONS=57} [2022-11-25 18:24:12,012 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2022-11-25 18:24:12,013 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 57 transitions, 512 flow [2022-11-25 18:24:12,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:12,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:12,013 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 18:24:12,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:24:12,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 18:24:12,220 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1491075076, now seen corresponding path program 2 times [2022-11-25 18:24:12,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:12,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963473214] [2022-11-25 18:24:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:12,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963473214] [2022-11-25 18:24:12,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963473214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710067218] [2022-11-25 18:24:12,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:24:12,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:12,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:12,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:12,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:24:12,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:24:12,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:24:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:24:12,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:12,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:24:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710067218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:24:12,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:24:12,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 18:24:12,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132866421] [2022-11-25 18:24:12,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:24:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:24:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:24:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:24:12,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2022-11-25 18:24:12,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 57 transitions, 512 flow. Second operand has 13 states, 13 states have (on average 82.3076923076923) internal successors, (1070), 13 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:12,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:12,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2022-11-25 18:24:12,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:13,265 INFO L130 PetriNetUnfolder]: 1599/3017 cut-off events. [2022-11-25 18:24:13,266 INFO L131 PetriNetUnfolder]: For 8199/8271 co-relation queries the response was YES. [2022-11-25 18:24:13,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10982 conditions, 3017 events. 1599/3017 cut-off events. For 8199/8271 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20073 event pairs, 165 based on Foata normal form. 406/3029 useless extension candidates. Maximal degree in co-relation 10963. Up to 783 conditions per place. [2022-11-25 18:24:13,295 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 142 selfloop transitions, 114 changer transitions 0/258 dead transitions. [2022-11-25 18:24:13,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 258 transitions, 2202 flow [2022-11-25 18:24:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:24:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:24:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1242 transitions. [2022-11-25 18:24:13,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5554561717352415 [2022-11-25 18:24:13,300 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1242 transitions. [2022-11-25 18:24:13,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1242 transitions. [2022-11-25 18:24:13,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:13,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1242 transitions. [2022-11-25 18:24:13,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.53846153846153) internal successors, (1242), 13 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:13,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 172.0) internal successors, (2408), 14 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:13,345 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 172.0) internal successors, (2408), 14 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:13,346 INFO L175 Difference]: Start difference. First operand has 47 places, 57 transitions, 512 flow. Second operand 13 states and 1242 transitions. [2022-11-25 18:24:13,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 258 transitions, 2202 flow [2022-11-25 18:24:13,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 258 transitions, 2201 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:24:13,367 INFO L231 Difference]: Finished difference. Result has 69 places, 150 transitions, 2001 flow [2022-11-25 18:24:13,368 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2001, PETRI_PLACES=69, PETRI_TRANSITIONS=150} [2022-11-25 18:24:13,370 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2022-11-25 18:24:13,371 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 150 transitions, 2001 flow [2022-11-25 18:24:13,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 82.3076923076923) internal successors, (1070), 13 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:13,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:13,372 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:24:13,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:24:13,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 18:24:13,579 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1024557434, now seen corresponding path program 1 times [2022-11-25 18:24:13,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:13,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043459665] [2022-11-25 18:24:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:13,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:13,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:13,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043459665] [2022-11-25 18:24:13,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043459665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:13,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663048374] [2022-11-25 18:24:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:13,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:13,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:13,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:13,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:24:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:24:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:24:13,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:24:13,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663048374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:24:13,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:24:13,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-25 18:24:13,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016046338] [2022-11-25 18:24:13,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:13,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:24:13,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:13,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:24:13,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:24:13,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2022-11-25 18:24:13,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 150 transitions, 2001 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:13,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:13,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2022-11-25 18:24:13,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:14,389 INFO L130 PetriNetUnfolder]: 1295/2464 cut-off events. [2022-11-25 18:24:14,390 INFO L131 PetriNetUnfolder]: For 11112/11180 co-relation queries the response was YES. [2022-11-25 18:24:14,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10646 conditions, 2464 events. 1295/2464 cut-off events. For 11112/11180 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16043 event pairs, 841 based on Foata normal form. 68/2374 useless extension candidates. Maximal degree in co-relation 10615. Up to 2460 conditions per place. [2022-11-25 18:24:14,419 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 125 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2022-11-25 18:24:14,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 128 transitions, 1941 flow [2022-11-25 18:24:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:24:14,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:24:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2022-11-25 18:24:14,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-11-25 18:24:14,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2022-11-25 18:24:14,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2022-11-25 18:24:14,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:14,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2022-11-25 18:24:14,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:14,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:14,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:14,425 INFO L175 Difference]: Start difference. First operand has 69 places, 150 transitions, 2001 flow. Second operand 3 states and 258 transitions. [2022-11-25 18:24:14,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 128 transitions, 1941 flow [2022-11-25 18:24:14,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 128 transitions, 1758 flow, removed 88 selfloop flow, removed 1 redundant places. [2022-11-25 18:24:14,495 INFO L231 Difference]: Finished difference. Result has 69 places, 128 transitions, 1508 flow [2022-11-25 18:24:14,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1508, PETRI_PLACES=69, PETRI_TRANSITIONS=128} [2022-11-25 18:24:14,497 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2022-11-25 18:24:14,497 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 128 transitions, 1508 flow [2022-11-25 18:24:14,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:14,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:14,497 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:24:14,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:24:14,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:14,704 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -188570839, now seen corresponding path program 1 times [2022-11-25 18:24:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:14,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908750433] [2022-11-25 18:24:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:14,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908750433] [2022-11-25 18:24:14,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908750433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:14,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876285317] [2022-11-25 18:24:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:14,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:14,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:14,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:14,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:24:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:14,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:24:14,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:14,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:24:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:15,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876285317] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:15,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:24:15,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2022-11-25 18:24:15,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655414108] [2022-11-25 18:24:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:15,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:24:15,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:24:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:24:15,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2022-11-25 18:24:15,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 128 transitions, 1508 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:15,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:15,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2022-11-25 18:24:15,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:15,542 INFO L130 PetriNetUnfolder]: 1083/2069 cut-off events. [2022-11-25 18:24:15,543 INFO L131 PetriNetUnfolder]: For 8214/8214 co-relation queries the response was YES. [2022-11-25 18:24:15,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7681 conditions, 2069 events. 1083/2069 cut-off events. For 8214/8214 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12625 event pairs, 257 based on Foata normal form. 122/2133 useless extension candidates. Maximal degree in co-relation 7649. Up to 1882 conditions per place. [2022-11-25 18:24:15,567 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 113 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2022-11-25 18:24:15,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 118 transitions, 1503 flow [2022-11-25 18:24:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:24:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:24:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2022-11-25 18:24:15,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5058139534883721 [2022-11-25 18:24:15,569 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2022-11-25 18:24:15,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2022-11-25 18:24:15,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:15,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2022-11-25 18:24:15,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:15,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:15,573 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:15,573 INFO L175 Difference]: Start difference. First operand has 69 places, 128 transitions, 1508 flow. Second operand 4 states and 348 transitions. [2022-11-25 18:24:15,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 118 transitions, 1503 flow [2022-11-25 18:24:15,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 1484 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-25 18:24:15,605 INFO L231 Difference]: Finished difference. Result has 69 places, 101 transitions, 1155 flow [2022-11-25 18:24:15,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1155, PETRI_PLACES=69, PETRI_TRANSITIONS=101} [2022-11-25 18:24:15,606 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2022-11-25 18:24:15,606 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 101 transitions, 1155 flow [2022-11-25 18:24:15,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:15,607 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:15,607 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:24:15,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 18:24:15,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:15,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:15,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:15,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1034136813, now seen corresponding path program 1 times [2022-11-25 18:24:15,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:15,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866798355] [2022-11-25 18:24:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:15,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:15,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:15,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866798355] [2022-11-25 18:24:15,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866798355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:24:15,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:24:15,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:24:15,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351541821] [2022-11-25 18:24:15,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:15,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:24:15,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:24:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:24:16,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 172 [2022-11-25 18:24:16,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 101 transitions, 1155 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:16,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:16,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 172 [2022-11-25 18:24:16,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:16,340 INFO L130 PetriNetUnfolder]: 994/1861 cut-off events. [2022-11-25 18:24:16,341 INFO L131 PetriNetUnfolder]: For 7738/7800 co-relation queries the response was YES. [2022-11-25 18:24:16,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7125 conditions, 1861 events. 994/1861 cut-off events. For 7738/7800 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11257 event pairs, 673 based on Foata normal form. 62/1919 useless extension candidates. Maximal degree in co-relation 7095. Up to 1854 conditions per place. [2022-11-25 18:24:16,360 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 96 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2022-11-25 18:24:16,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 1347 flow [2022-11-25 18:24:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:24:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:24:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2022-11-25 18:24:16,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4786821705426357 [2022-11-25 18:24:16,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2022-11-25 18:24:16,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2022-11-25 18:24:16,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:16,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2022-11-25 18:24:16,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:16,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:16,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:16,366 INFO L175 Difference]: Start difference. First operand has 69 places, 101 transitions, 1155 flow. Second operand 3 states and 247 transitions. [2022-11-25 18:24:16,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 1347 flow [2022-11-25 18:24:16,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 100 transitions, 1347 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:24:16,393 INFO L231 Difference]: Finished difference. Result has 70 places, 100 transitions, 1155 flow [2022-11-25 18:24:16,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1155, PETRI_PLACES=70, PETRI_TRANSITIONS=100} [2022-11-25 18:24:16,394 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2022-11-25 18:24:16,394 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 100 transitions, 1155 flow [2022-11-25 18:24:16,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:16,395 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:16,395 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:24:16,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:24:16,395 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1869431725, now seen corresponding path program 1 times [2022-11-25 18:24:16,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:16,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112563731] [2022-11-25 18:24:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:16,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:16,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:16,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112563731] [2022-11-25 18:24:16,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112563731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:24:16,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:24:16,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:24:16,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423871861] [2022-11-25 18:24:16,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:24:16,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:24:16,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:24:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:24:16,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 172 [2022-11-25 18:24:16,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 100 transitions, 1155 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:16,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:16,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 172 [2022-11-25 18:24:16,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:16,928 INFO L130 PetriNetUnfolder]: 994/1805 cut-off events. [2022-11-25 18:24:16,928 INFO L131 PetriNetUnfolder]: For 7738/7800 co-relation queries the response was YES. [2022-11-25 18:24:16,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7015 conditions, 1805 events. 994/1805 cut-off events. For 7738/7800 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10596 event pairs, 673 based on Foata normal form. 118/1919 useless extension candidates. Maximal degree in co-relation 6983. Up to 1798 conditions per place. [2022-11-25 18:24:16,943 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 94 selfloop transitions, 1 changer transitions 1/99 dead transitions. [2022-11-25 18:24:16,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 1345 flow [2022-11-25 18:24:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:24:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:24:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2022-11-25 18:24:16,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2022-11-25 18:24:16,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2022-11-25 18:24:16,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2022-11-25 18:24:16,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:16,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2022-11-25 18:24:16,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:16,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:16,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 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) [2022-11-25 18:24:16,948 INFO L175 Difference]: Start difference. First operand has 70 places, 100 transitions, 1155 flow. Second operand 3 states and 246 transitions. [2022-11-25 18:24:16,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 1345 flow [2022-11-25 18:24:16,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 1344 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:24:16,972 INFO L231 Difference]: Finished difference. Result has 70 places, 98 transitions, 1151 flow [2022-11-25 18:24:16,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1151, PETRI_PLACES=70, PETRI_TRANSITIONS=98} [2022-11-25 18:24:16,974 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2022-11-25 18:24:16,974 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 98 transitions, 1151 flow [2022-11-25 18:24:16,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:16,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:16,975 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-11-25 18:24:16,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:24:16,975 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:16,976 INFO L85 PathProgramCache]: Analyzing trace with hash -876863932, now seen corresponding path program 3 times [2022-11-25 18:24:16,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:16,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822314077] [2022-11-25 18:24:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:16,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:17,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:17,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822314077] [2022-11-25 18:24:17,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822314077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:17,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579654118] [2022-11-25 18:24:17,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:24:17,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:17,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:17,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:24:17,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 18:24:17,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:24:17,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:24:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:17,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:24:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:17,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579654118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:24:17,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:24:17,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-25 18:24:17,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323646685] [2022-11-25 18:24:17,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:24:17,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 18:24:17,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 18:24:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:24:17,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2022-11-25 18:24:17,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 98 transitions, 1151 flow. Second operand has 25 states, 25 states have (on average 82.16) internal successors, (2054), 25 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:17,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:17,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2022-11-25 18:24:17,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:18,871 INFO L130 PetriNetUnfolder]: 2530/4448 cut-off events. [2022-11-25 18:24:18,871 INFO L131 PetriNetUnfolder]: For 61268/61404 co-relation queries the response was YES. [2022-11-25 18:24:18,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16118 conditions, 4448 events. 2530/4448 cut-off events. For 61268/61404 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 26098 event pairs, 277 based on Foata normal form. 714/5160 useless extension candidates. Maximal degree in co-relation 16085. Up to 905 conditions per place. [2022-11-25 18:24:18,907 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 117 selfloop transitions, 242 changer transitions 69/431 dead transitions. [2022-11-25 18:24:18,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 431 transitions, 4137 flow [2022-11-25 18:24:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 18:24:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 18:24:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2287 transitions. [2022-11-25 18:24:18,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.531860465116279 [2022-11-25 18:24:18,915 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2287 transitions. [2022-11-25 18:24:18,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2287 transitions. [2022-11-25 18:24:18,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:18,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2287 transitions. [2022-11-25 18:24:18,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 91.48) internal successors, (2287), 25 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:18,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 172.0) internal successors, (4472), 26 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:18,931 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 172.0) internal successors, (4472), 26 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:18,931 INFO L175 Difference]: Start difference. First operand has 70 places, 98 transitions, 1151 flow. Second operand 25 states and 2287 transitions. [2022-11-25 18:24:18,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 431 transitions, 4137 flow [2022-11-25 18:24:18,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 431 transitions, 4136 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:24:18,980 INFO L231 Difference]: Finished difference. Result has 114 places, 272 transitions, 4045 flow [2022-11-25 18:24:18,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4045, PETRI_PLACES=114, PETRI_TRANSITIONS=272} [2022-11-25 18:24:18,981 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 85 predicate places. [2022-11-25 18:24:18,982 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 272 transitions, 4045 flow [2022-11-25 18:24:18,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.16) internal successors, (2054), 25 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:18,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:18,983 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2022-11-25 18:24:18,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:24:19,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:24:19,190 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:19,190 INFO L85 PathProgramCache]: Analyzing trace with hash -495367484, now seen corresponding path program 4 times [2022-11-25 18:24:19,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:19,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638897857] [2022-11-25 18:24:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:19,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:19,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:19,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638897857] [2022-11-25 18:24:19,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638897857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:19,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519836925] [2022-11-25 18:24:19,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:24:19,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:19,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:19,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:19,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:24:19,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:24:19,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:24:19,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 18:24:19,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:19,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:24:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:20,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519836925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:24:20,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:24:20,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-11-25 18:24:20,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193163770] [2022-11-25 18:24:20,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:24:20,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 18:24:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 18:24:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 18:24:20,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2022-11-25 18:24:20,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 272 transitions, 4045 flow. Second operand has 49 states, 49 states have (on average 82.08163265306122) internal successors, (4022), 49 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:20,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:20,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2022-11-25 18:24:20,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:24:25,830 INFO L130 PetriNetUnfolder]: 7954/13964 cut-off events. [2022-11-25 18:24:25,830 INFO L131 PetriNetUnfolder]: For 730786/731066 co-relation queries the response was YES. [2022-11-25 18:24:25,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57755 conditions, 13964 events. 7954/13964 cut-off events. For 730786/731066 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 90863 event pairs, 893 based on Foata normal form. 1506/15468 useless extension candidates. Maximal degree in co-relation 57699. Up to 4005 conditions per place. [2022-11-25 18:24:26,006 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 215 selfloop transitions, 882 changer transitions 141/1241 dead transitions. [2022-11-25 18:24:26,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 1241 transitions, 15699 flow [2022-11-25 18:24:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 18:24:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-25 18:24:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4495 transitions. [2022-11-25 18:24:26,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5333412434741338 [2022-11-25 18:24:26,021 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4495 transitions. [2022-11-25 18:24:26,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4495 transitions. [2022-11-25 18:24:26,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:24:26,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4495 transitions. [2022-11-25 18:24:26,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 91.73469387755102) internal successors, (4495), 49 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:26,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 172.0) internal successors, (8600), 50 states have internal predecessors, (8600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:26,058 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 172.0) internal successors, (8600), 50 states have internal predecessors, (8600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:26,058 INFO L175 Difference]: Start difference. First operand has 114 places, 272 transitions, 4045 flow. Second operand 49 states and 4495 transitions. [2022-11-25 18:24:26,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 1241 transitions, 15699 flow [2022-11-25 18:24:26,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 1241 transitions, 13416 flow, removed 1134 selfloop flow, removed 2 redundant places. [2022-11-25 18:24:26,645 INFO L231 Difference]: Finished difference. Result has 206 places, 914 transitions, 14049 flow [2022-11-25 18:24:26,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14049, PETRI_PLACES=206, PETRI_TRANSITIONS=914} [2022-11-25 18:24:26,645 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 177 predicate places. [2022-11-25 18:24:26,646 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 914 transitions, 14049 flow [2022-11-25 18:24:26,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 82.08163265306122) internal successors, (4022), 49 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:26,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:24:26,648 INFO L209 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2022-11-25 18:24:26,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:24:26,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 18:24:26,855 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:24:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash -512269372, now seen corresponding path program 5 times [2022-11-25 18:24:26,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:26,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502317696] [2022-11-25 18:24:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:24:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:29,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502317696] [2022-11-25 18:24:29,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502317696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:24:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222908056] [2022-11-25 18:24:29,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:24:29,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:29,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:29,015 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:29,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:24:29,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-25 18:24:29,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:24:29,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 18:24:29,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:29,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:24:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:32,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222908056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:24:32,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:24:32,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2022-11-25 18:24:32,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329412621] [2022-11-25 18:24:32,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:24:32,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-25 18:24:32,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-25 18:24:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-25 18:24:33,042 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2022-11-25 18:24:33,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 914 transitions, 14049 flow. Second operand has 97 states, 97 states have (on average 82.04123711340206) internal successors, (7958), 97 states have internal predecessors, (7958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:24:33,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:24:33,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2022-11-25 18:24:33,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:25:02,303 INFO L130 PetriNetUnfolder]: 28066/49208 cut-off events. [2022-11-25 18:25:02,303 INFO L131 PetriNetUnfolder]: For 7517687/7518255 co-relation queries the response was YES. [2022-11-25 18:25:03,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205379 conditions, 49208 events. 28066/49208 cut-off events. For 7517687/7518255 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 358935 event pairs, 3285 based on Foata normal form. 3090/52296 useless extension candidates. Maximal degree in co-relation 205277. Up to 13821 conditions per place. [2022-11-25 18:25:03,453 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 409 selfloop transitions, 3322 changer transitions 285/4019 dead transitions. [2022-11-25 18:25:03,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 4019 transitions, 56063 flow [2022-11-25 18:25:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-25 18:25:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-11-25 18:25:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8911 transitions. [2022-11-25 18:25:03,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.534104531287461 [2022-11-25 18:25:03,470 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8911 transitions. [2022-11-25 18:25:03,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8911 transitions. [2022-11-25 18:25:03,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:25:03,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8911 transitions. [2022-11-25 18:25:03,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 91.8659793814433) internal successors, (8911), 97 states have internal predecessors, (8911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:03,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 172.0) internal successors, (16856), 98 states have internal predecessors, (16856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:03,519 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 172.0) internal successors, (16856), 98 states have internal predecessors, (16856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:03,519 INFO L175 Difference]: Start difference. First operand has 206 places, 914 transitions, 14049 flow. Second operand 97 states and 8911 transitions. [2022-11-25 18:25:03,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 4019 transitions, 56063 flow [2022-11-25 18:25:07,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 4019 transitions, 47035 flow, removed 4326 selfloop flow, removed 11 redundant places. [2022-11-25 18:25:07,873 INFO L231 Difference]: Finished difference. Result has 385 places, 3356 transitions, 51440 flow [2022-11-25 18:25:07,874 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=12987, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=51440, PETRI_PLACES=385, PETRI_TRANSITIONS=3356} [2022-11-25 18:25:07,875 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 356 predicate places. [2022-11-25 18:25:07,875 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 3356 transitions, 51440 flow [2022-11-25 18:25:07,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 82.04123711340206) internal successors, (7958), 97 states have internal predecessors, (7958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:07,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:25:07,877 INFO L209 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2022-11-25 18:25:07,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:25:08,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:25:08,083 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 18:25:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:25:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash 956470724, now seen corresponding path program 6 times [2022-11-25 18:25:08,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:25:08,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323877358] [2022-11-25 18:25:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:25:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:25:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:25:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:15,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:25:15,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323877358] [2022-11-25 18:25:15,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323877358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:25:15,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969291493] [2022-11-25 18:25:15,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:25:15,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:25:15,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:25:15,250 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:25:15,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa311bb-8d49-48ed-b679-002bdbd35c48/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:25:15,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2022-11-25 18:25:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:25:15,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 18:25:15,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:25:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:15,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:25:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:25:27,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969291493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:25:27,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:25:27,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2022-11-25 18:25:27,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341197549] [2022-11-25 18:25:27,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:25:27,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-25 18:25:27,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:25:27,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-25 18:25:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-25 18:25:27,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2022-11-25 18:25:27,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 3356 transitions, 51440 flow. Second operand has 193 states, 193 states have (on average 82.02072538860104) internal successors, (15830), 193 states have internal predecessors, (15830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:27,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:25:27,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2022-11-25 18:25:27,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand