./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/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_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/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_b8e59829-b5aa-45ca-a075-8d71ece91fb7/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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- 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 15:33:40,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:33:40,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:33:40,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:33:40,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:33:40,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:33:40,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:33:40,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:33:40,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:33:40,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:33:40,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:33:40,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:33:40,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:33:40,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:33:40,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:33:40,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:33:40,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:33:40,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:33:40,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:33:40,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:33:40,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:33:40,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:33:40,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:33:40,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:33:40,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:33:40,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:33:40,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:33:40,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:33:40,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:33:40,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:33:40,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:33:40,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:33:40,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:33:40,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:33:40,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:33:40,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:33:40,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:33:40,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:33:40,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:33:40,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:33:40,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:33:40,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 15:33:40,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:33:40,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:33:40,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:33:40,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:33:40,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:33:40,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:33:40,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:33:40,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:33:40,543 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:33:40,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:33:40,543 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:33:40,544 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:33:40,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:33:40,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:33:40,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:33:40,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:33:40,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:33:40,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:33:40,545 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 15:33:40,546 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:33:40,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:33:40,546 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:33:40,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:33:40,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:33:40,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:33:40,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:33:40,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:33:40,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:33:40,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:33:40,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:33:40,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:33:40,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:33:40,549 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:33:40,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:33:40,549 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:33:40,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:33:40,550 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_b8e59829-b5aa-45ca-a075-8d71ece91fb7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2022-11-25 15:33:40,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:33:40,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:33:40,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:33:40,843 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:33:40,843 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:33:40,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-25 15:33:43,925 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:33:44,166 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:33:44,166 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-25 15:33:44,178 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/data/a46183ec1/f293bcb7f7bc464c83d04533d341656a/FLAGa36eec0a9 [2022-11-25 15:33:44,203 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/data/a46183ec1/f293bcb7f7bc464c83d04533d341656a [2022-11-25 15:33:44,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:33:44,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:33:44,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:33:44,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:33:44,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:33:44,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1455b1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44, skipping insertion in model container [2022-11-25 15:33:44,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:33:44,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:33:44,506 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:33:44,509 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:33:44,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:33:44,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:33:44,512 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:33:44,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:33:44,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:33:44,516 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:33:44,525 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_b8e59829-b5aa-45ca-a075-8d71ece91fb7/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-25 15:33:44,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:33:44,543 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:33:44,561 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:33:44,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:33:44,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:33:44,564 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:33:44,565 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:33:44,566 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:33:44,566 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:33:44,567 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:33:44,573 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_b8e59829-b5aa-45ca-a075-8d71ece91fb7/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-25 15:33:44,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:33:44,594 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:33:44,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44 WrapperNode [2022-11-25 15:33:44,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:33:44,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:33:44,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:33:44,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:33:44,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,643 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 125 [2022-11-25 15:33:44,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:33:44,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:33:44,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:33:44,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:33:44,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,678 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:33:44,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:33:44,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:33:44,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:33:44,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (1/1) ... [2022-11-25 15:33:44,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:33:44,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:44,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:33:44,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:33:44,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:33:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:33:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:33:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:33:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:33:44,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:33:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:33:44,772 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:33:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 15:33:44,772 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 15:33:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:33:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:33:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:33:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:33:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:33:44,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:33:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:33:44,775 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 15:33:44,890 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:33:44,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:33:45,440 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:33:45,499 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:33:45,500 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 15:33:45,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:33:45 BoogieIcfgContainer [2022-11-25 15:33:45,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:33:45,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:33:45,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:33:45,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:33:45,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:33:44" (1/3) ... [2022-11-25 15:33:45,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fc57b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:33:45, skipping insertion in model container [2022-11-25 15:33:45,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:44" (2/3) ... [2022-11-25 15:33:45,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fc57b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:33:45, skipping insertion in model container [2022-11-25 15:33:45,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:33:45" (3/3) ... [2022-11-25 15:33:45,525 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2022-11-25 15:33:45,535 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:33:45,550 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:33:45,550 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 15:33:45,550 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:33:45,667 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 15:33:45,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 205 transitions, 434 flow [2022-11-25 15:33:45,823 INFO L130 PetriNetUnfolder]: 16/202 cut-off events. [2022-11-25 15:33:45,824 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:33:45,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 16/202 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 158. Up to 3 conditions per place. [2022-11-25 15:33:45,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 205 transitions, 434 flow [2022-11-25 15:33:45,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 181 transitions, 377 flow [2022-11-25 15:33:45,860 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:33:45,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 181 transitions, 377 flow [2022-11-25 15:33:45,897 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 181 transitions, 377 flow [2022-11-25 15:33:45,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 181 transitions, 377 flow [2022-11-25 15:33:45,964 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2022-11-25 15:33:45,964 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:33:45,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 181 events. 15/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 177 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 158. Up to 3 conditions per place. [2022-11-25 15:33:45,968 INFO L119 LiptonReduction]: Number of co-enabled transitions 2680 [2022-11-25 15:33:53,906 INFO L134 LiptonReduction]: Checked pairs total: 4574 [2022-11-25 15:33:53,907 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-11-25 15:33:53,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:33:53,930 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;@21d8b778, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:33:53,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-11-25 15:33:53,933 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 15:33:53,933 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:33:53,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:53,934 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:33:53,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:33:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:53,940 INFO L85 PathProgramCache]: Analyzing trace with hash 24104, now seen corresponding path program 1 times [2022-11-25 15:33:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:53,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844991233] [2022-11-25 15:33:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:54,233 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 15:33:54,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:54,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844991233] [2022-11-25 15:33:54,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844991233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:54,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:54,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:33:54,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715684958] [2022-11-25 15:33:54,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:54,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:33:54,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:33:54,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:33:54,333 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 388 [2022-11-25 15:33:54,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:54,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:54,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 388 [2022-11-25 15:33:54,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:54,983 INFO L130 PetriNetUnfolder]: 3269/4307 cut-off events. [2022-11-25 15:33:54,983 INFO L131 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-11-25 15:33:54,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8805 conditions, 4307 events. 3269/4307 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 19417 event pairs, 1766 based on Foata normal form. 0/1847 useless extension candidates. Maximal degree in co-relation 3753. Up to 2136 conditions per place. [2022-11-25 15:33:55,023 INFO L137 encePairwiseOnDemand]: 380/388 looper letters, 59 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2022-11-25 15:33:55,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 66 transitions, 288 flow [2022-11-25 15:33:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:33:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:33:55,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2022-11-25 15:33:55,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5214776632302406 [2022-11-25 15:33:55,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2022-11-25 15:33:55,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2022-11-25 15:33:55,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:55,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2022-11-25 15:33:55,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:55,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:55,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:55,076 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 89 flow. Second operand 3 states and 607 transitions. [2022-11-25 15:33:55,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 66 transitions, 288 flow [2022-11-25 15:33:55,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 66 transitions, 270 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-25 15:33:55,098 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 116 flow [2022-11-25 15:33:55,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2022-11-25 15:33:55,104 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2022-11-25 15:33:55,104 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 116 flow [2022-11-25 15:33:55,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:55,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:55,105 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:33:55,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:33:55,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:33:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash 748171, now seen corresponding path program 1 times [2022-11-25 15:33:55,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:55,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088402018] [2022-11-25 15:33:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:55,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:55,237 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 15:33:55,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:55,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088402018] [2022-11-25 15:33:55,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088402018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:55,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:55,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:33:55,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700596442] [2022-11-25 15:33:55,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:55,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:33:55,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:33:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:33:55,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 388 [2022-11-25 15:33:55,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:55,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:55,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 388 [2022-11-25 15:33:55,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:55,718 INFO L130 PetriNetUnfolder]: 3269/4305 cut-off events. [2022-11-25 15:33:55,718 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-25 15:33:55,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8717 conditions, 4305 events. 3269/4305 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 19460 event pairs, 1766 based on Foata normal form. 0/1821 useless extension candidates. Maximal degree in co-relation 4347. Up to 4263 conditions per place. [2022-11-25 15:33:55,747 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 34 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-11-25 15:33:55,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 178 flow [2022-11-25 15:33:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:33:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:33:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2022-11-25 15:33:55,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49312714776632305 [2022-11-25 15:33:55,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2022-11-25 15:33:55,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2022-11-25 15:33:55,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:55,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2022-11-25 15:33:55,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:55,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:55,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:55,756 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 116 flow. Second operand 3 states and 574 transitions. [2022-11-25 15:33:55,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 178 flow [2022-11-25 15:33:55,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:33:55,757 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 102 flow [2022-11-25 15:33:55,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2022-11-25 15:33:55,758 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2022-11-25 15:33:55,758 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 102 flow [2022-11-25 15:33:55,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:55,759 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:55,759 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:33:55,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:33:55,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:33:55,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:55,760 INFO L85 PathProgramCache]: Analyzing trace with hash 748170, now seen corresponding path program 1 times [2022-11-25 15:33:55,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:55,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358024944] [2022-11-25 15:33:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:55,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:55,861 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 15:33:55,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:55,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358024944] [2022-11-25 15:33:55,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358024944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:55,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122416980] [2022-11-25 15:33:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:55,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:55,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:55,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:55,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:33:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:55,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:33:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:56,019 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 15:33:56,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:56,053 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 15:33:56,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122416980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:56,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:56,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2022-11-25 15:33:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224780444] [2022-11-25 15:33:56,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:33:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:33:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:33:56,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 388 [2022-11-25 15:33:56,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 102 flow. Second operand has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:56,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:56,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 388 [2022-11-25 15:33:56,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:57,570 INFO L130 PetriNetUnfolder]: 8171/10758 cut-off events. [2022-11-25 15:33:57,570 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-11-25 15:33:57,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21764 conditions, 10758 events. 8171/10758 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 54471 event pairs, 4415 based on Foata normal form. 0/4666 useless extension candidates. Maximal degree in co-relation 21756. Up to 2134 conditions per place. [2022-11-25 15:33:57,647 INFO L137 encePairwiseOnDemand]: 382/388 looper letters, 135 selfloop transitions, 13 changer transitions 0/151 dead transitions. [2022-11-25 15:33:57,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 151 transitions, 666 flow [2022-11-25 15:33:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:33:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:33:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1234 transitions. [2022-11-25 15:33:57,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5300687285223368 [2022-11-25 15:33:57,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1234 transitions. [2022-11-25 15:33:57,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1234 transitions. [2022-11-25 15:33:57,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:57,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1234 transitions. [2022-11-25 15:33:57,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 205.66666666666666) internal successors, (1234), 6 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:57,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:57,661 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:57,662 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 102 flow. Second operand 6 states and 1234 transitions. [2022-11-25 15:33:57,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 151 transitions, 666 flow [2022-11-25 15:33:57,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 151 transitions, 665 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:57,667 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 194 flow [2022-11-25 15:33:57,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2022-11-25 15:33:57,672 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2022-11-25 15:33:57,673 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 194 flow [2022-11-25 15:33:57,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:57,674 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:57,674 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:33:57,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:57,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 15:33:57,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:33:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 829560642, now seen corresponding path program 1 times [2022-11-25 15:33:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99125292] [2022-11-25 15:33:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:57,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:57,980 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 15:33:57,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:57,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99125292] [2022-11-25 15:33:57,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99125292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:57,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:57,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:33:57,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853290337] [2022-11-25 15:33:57,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:57,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:33:57,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:33:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:33:57,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 388 [2022-11-25 15:33:57,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:57,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:57,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 388 [2022-11-25 15:33:57,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:59,599 INFO L130 PetriNetUnfolder]: 10601/14468 cut-off events. [2022-11-25 15:33:59,600 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2022-11-25 15:33:59,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29367 conditions, 14468 events. 10601/14468 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 80697 event pairs, 4270 based on Foata normal form. 0/7076 useless extension candidates. Maximal degree in co-relation 29355. Up to 9514 conditions per place. [2022-11-25 15:33:59,687 INFO L137 encePairwiseOnDemand]: 384/388 looper letters, 65 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2022-11-25 15:33:59,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 69 transitions, 377 flow [2022-11-25 15:33:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:33:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:33:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2022-11-25 15:33:59,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5231958762886598 [2022-11-25 15:33:59,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2022-11-25 15:33:59,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2022-11-25 15:33:59,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:59,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2022-11-25 15:33:59,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:59,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:59,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:59,697 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 194 flow. Second operand 3 states and 609 transitions. [2022-11-25 15:33:59,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 69 transitions, 377 flow [2022-11-25 15:33:59,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 358 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:59,700 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 189 flow [2022-11-25 15:33:59,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2022-11-25 15:33:59,701 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2022-11-25 15:33:59,701 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 189 flow [2022-11-25 15:33:59,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:59,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:59,702 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 15:33:59,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:33:59,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:33:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:59,703 INFO L85 PathProgramCache]: Analyzing trace with hash 814866151, now seen corresponding path program 2 times [2022-11-25 15:33:59,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:59,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021080670] [2022-11-25 15:33:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:59,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:59,865 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 15:33:59,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:59,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021080670] [2022-11-25 15:33:59,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021080670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:59,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240942508] [2022-11-25 15:33:59,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:33:59,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:59,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:59,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:59,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:33:59,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:33:59,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:59,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:33:59,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:59,983 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 15:33:59,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:33:59,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240942508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:59,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:33:59,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-25 15:33:59,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526088021] [2022-11-25 15:33:59,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:59,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:33:59,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:59,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:33:59,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:34:00,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 388 [2022-11-25 15:34:00,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:00,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:00,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 388 [2022-11-25 15:34:00,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:01,623 INFO L130 PetriNetUnfolder]: 9211/12652 cut-off events. [2022-11-25 15:34:01,623 INFO L131 PetriNetUnfolder]: For 1001/1406 co-relation queries the response was YES. [2022-11-25 15:34:01,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27682 conditions, 12652 events. 9211/12652 cut-off events. For 1001/1406 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 71782 event pairs, 5915 based on Foata normal form. 406/7177 useless extension candidates. Maximal degree in co-relation 27669. Up to 12532 conditions per place. [2022-11-25 15:34:01,833 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 38 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2022-11-25 15:34:01,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 267 flow [2022-11-25 15:34:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2022-11-25 15:34:01,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4965635738831615 [2022-11-25 15:34:01,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2022-11-25 15:34:01,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2022-11-25 15:34:01,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:01,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2022-11-25 15:34:01,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 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 15:34:01,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:01,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:01,843 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 189 flow. Second operand 3 states and 578 transitions. [2022-11-25 15:34:01,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 267 flow [2022-11-25 15:34:01,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:01,845 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 189 flow [2022-11-25 15:34:01,845 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2022-11-25 15:34:01,848 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2022-11-25 15:34:01,848 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 189 flow [2022-11-25 15:34:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:01,849 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:01,849 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 15:34:01,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:02,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:02,055 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:02,055 INFO L85 PathProgramCache]: Analyzing trace with hash -54702927, now seen corresponding path program 1 times [2022-11-25 15:34:02,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:02,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012175345] [2022-11-25 15:34:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:02,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:02,223 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 15:34:02,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:02,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012175345] [2022-11-25 15:34:02,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012175345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:02,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840084110] [2022-11-25 15:34:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:02,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:02,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:02,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:02,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:34:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:02,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:34:02,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:02,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:34:02,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840084110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:02,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:34:02,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-11-25 15:34:02,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710482798] [2022-11-25 15:34:02,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:02,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:34:02,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:34:02,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:34:02,447 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 388 [2022-11-25 15:34:02,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:02,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:02,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 388 [2022-11-25 15:34:02,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:04,191 INFO L130 PetriNetUnfolder]: 10813/14855 cut-off events. [2022-11-25 15:34:04,192 INFO L131 PetriNetUnfolder]: For 1194/1680 co-relation queries the response was YES. [2022-11-25 15:34:04,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31977 conditions, 14855 events. 10813/14855 cut-off events. For 1194/1680 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 85201 event pairs, 6930 based on Foata normal form. 487/8684 useless extension candidates. Maximal degree in co-relation 31963. Up to 10028 conditions per place. [2022-11-25 15:34:04,304 INFO L137 encePairwiseOnDemand]: 383/388 looper letters, 89 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2022-11-25 15:34:04,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 100 transitions, 515 flow [2022-11-25 15:34:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:34:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:34:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 791 transitions. [2022-11-25 15:34:04,308 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5096649484536082 [2022-11-25 15:34:04,308 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 791 transitions. [2022-11-25 15:34:04,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 791 transitions. [2022-11-25 15:34:04,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:04,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 791 transitions. [2022-11-25 15:34:04,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:04,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:04,318 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:04,318 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 189 flow. Second operand 4 states and 791 transitions. [2022-11-25 15:34:04,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 100 transitions, 515 flow [2022-11-25 15:34:04,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 100 transitions, 503 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:04,323 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 196 flow [2022-11-25 15:34:04,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2022-11-25 15:34:04,326 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2022-11-25 15:34:04,327 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 196 flow [2022-11-25 15:34:04,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:04,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:04,328 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:04,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:04,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:04,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:04,535 INFO L85 PathProgramCache]: Analyzing trace with hash -53422561, now seen corresponding path program 1 times [2022-11-25 15:34:04,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:04,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203719093] [2022-11-25 15:34:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:04,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:04,662 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 15:34:04,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:04,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203719093] [2022-11-25 15:34:04,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203719093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:04,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:04,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:34:04,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355081209] [2022-11-25 15:34:04,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:04,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:34:04,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:04,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:34:04,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:34:04,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 388 [2022-11-25 15:34:04,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 170.4) internal successors, (852), 5 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:04,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:04,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 388 [2022-11-25 15:34:04,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:06,512 INFO L130 PetriNetUnfolder]: 10059/13841 cut-off events. [2022-11-25 15:34:06,512 INFO L131 PetriNetUnfolder]: For 2470/2470 co-relation queries the response was YES. [2022-11-25 15:34:06,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30202 conditions, 13841 events. 10059/13841 cut-off events. For 2470/2470 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 77078 event pairs, 6192 based on Foata normal form. 172/8293 useless extension candidates. Maximal degree in co-relation 30187. Up to 11300 conditions per place. [2022-11-25 15:34:06,602 INFO L137 encePairwiseOnDemand]: 381/388 looper letters, 76 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2022-11-25 15:34:06,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 88 transitions, 461 flow [2022-11-25 15:34:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:34:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:34:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 922 transitions. [2022-11-25 15:34:06,605 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47525773195876286 [2022-11-25 15:34:06,606 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 922 transitions. [2022-11-25 15:34:06,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 922 transitions. [2022-11-25 15:34:06,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:06,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 922 transitions. [2022-11-25 15:34:06,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.4) internal successors, (922), 5 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:06,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:06,613 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:06,613 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 196 flow. Second operand 5 states and 922 transitions. [2022-11-25 15:34:06,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 88 transitions, 461 flow [2022-11-25 15:34:06,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 445 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:06,620 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 225 flow [2022-11-25 15:34:06,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2022-11-25 15:34:06,621 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2022-11-25 15:34:06,621 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 225 flow [2022-11-25 15:34:06,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 170.4) internal successors, (852), 5 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:06,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:06,622 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 15:34:06,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:34:06,622 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:06,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1856603694, now seen corresponding path program 1 times [2022-11-25 15:34:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:06,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459800963] [2022-11-25 15:34:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:06,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:06,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:06,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459800963] [2022-11-25 15:34:06,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459800963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794283619] [2022-11-25 15:34:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:06,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:06,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:06,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:06,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:34:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:06,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:06,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:06,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:07,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794283619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:07,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:07,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2022-11-25 15:34:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935444020] [2022-11-25 15:34:07,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:07,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:34:07,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:34:07,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:34:07,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2022-11-25 15:34:07,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 225 flow. Second operand has 15 states, 15 states have (on average 173.33333333333334) internal successors, (2600), 15 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:07,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:07,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2022-11-25 15:34:07,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:10,007 INFO L130 PetriNetUnfolder]: 11778/16254 cut-off events. [2022-11-25 15:34:10,007 INFO L131 PetriNetUnfolder]: For 3851/5228 co-relation queries the response was YES. [2022-11-25 15:34:10,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35581 conditions, 16254 events. 11778/16254 cut-off events. For 3851/5228 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 94140 event pairs, 7528 based on Foata normal form. 1543/10939 useless extension candidates. Maximal degree in co-relation 35563. Up to 2504 conditions per place. [2022-11-25 15:34:10,113 INFO L137 encePairwiseOnDemand]: 381/388 looper letters, 180 selfloop transitions, 26 changer transitions 0/210 dead transitions. [2022-11-25 15:34:10,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 210 transitions, 1084 flow [2022-11-25 15:34:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:34:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 15:34:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2956 transitions. [2022-11-25 15:34:10,121 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47615979381443296 [2022-11-25 15:34:10,121 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2956 transitions. [2022-11-25 15:34:10,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2956 transitions. [2022-11-25 15:34:10,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:10,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2956 transitions. [2022-11-25 15:34:10,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 184.75) internal successors, (2956), 16 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:10,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 388.0) internal successors, (6596), 17 states have internal predecessors, (6596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:10,265 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 388.0) internal successors, (6596), 17 states have internal predecessors, (6596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:10,266 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 225 flow. Second operand 16 states and 2956 transitions. [2022-11-25 15:34:10,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 210 transitions, 1084 flow [2022-11-25 15:34:10,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 210 transitions, 1065 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:10,273 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 337 flow [2022-11-25 15:34:10,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=337, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2022-11-25 15:34:10,274 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2022-11-25 15:34:10,275 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 337 flow [2022-11-25 15:34:10,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 173.33333333333334) internal successors, (2600), 15 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:10,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:10,276 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:10,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 15:34:10,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:10,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:10,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1721421155, now seen corresponding path program 1 times [2022-11-25 15:34:10,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:10,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855476453] [2022-11-25 15:34:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:10,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:34:10,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:10,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855476453] [2022-11-25 15:34:10,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855476453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:10,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109496195] [2022-11-25 15:34:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:10,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:10,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:10,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:10,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:34:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:10,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:34:10,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:34:10,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:34:10,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109496195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:10,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:34:10,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-25 15:34:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957292989] [2022-11-25 15:34:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:10,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:34:10,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:34:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:34:10,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 388 [2022-11-25 15:34:10,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:10,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:10,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 388 [2022-11-25 15:34:10,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:12,299 INFO L130 PetriNetUnfolder]: 12862/17502 cut-off events. [2022-11-25 15:34:12,300 INFO L131 PetriNetUnfolder]: For 3553/3553 co-relation queries the response was YES. [2022-11-25 15:34:12,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40007 conditions, 17502 events. 12862/17502 cut-off events. For 3553/3553 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 101153 event pairs, 720 based on Foata normal form. 0/10566 useless extension candidates. Maximal degree in co-relation 39986. Up to 7792 conditions per place. [2022-11-25 15:34:12,425 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 91 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2022-11-25 15:34:12,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 603 flow [2022-11-25 15:34:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:34:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:34:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 806 transitions. [2022-11-25 15:34:12,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5193298969072165 [2022-11-25 15:34:12,429 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 806 transitions. [2022-11-25 15:34:12,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 806 transitions. [2022-11-25 15:34:12,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:12,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 806 transitions. [2022-11-25 15:34:12,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:12,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:12,435 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:12,436 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 337 flow. Second operand 4 states and 806 transitions. [2022-11-25 15:34:12,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 603 flow [2022-11-25 15:34:12,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 517 flow, removed 15 selfloop flow, removed 8 redundant places. [2022-11-25 15:34:12,457 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 253 flow [2022-11-25 15:34:12,457 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-11-25 15:34:12,458 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2022-11-25 15:34:12,458 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 253 flow [2022-11-25 15:34:12,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:12,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:12,459 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:12,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 15:34:12,665 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash 390933405, now seen corresponding path program 1 times [2022-11-25 15:34:12,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:12,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142170369] [2022-11-25 15:34:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:12,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:12,738 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 15:34:12,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:12,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142170369] [2022-11-25 15:34:12,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142170369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:12,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:12,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:34:12,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939694215] [2022-11-25 15:34:12,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:12,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:12,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:12,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:12,751 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 388 [2022-11-25 15:34:12,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:12,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:12,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 388 [2022-11-25 15:34:12,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:14,475 INFO L130 PetriNetUnfolder]: 15314/21290 cut-off events. [2022-11-25 15:34:14,475 INFO L131 PetriNetUnfolder]: For 13006/14871 co-relation queries the response was YES. [2022-11-25 15:34:14,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48259 conditions, 21290 events. 15314/21290 cut-off events. For 13006/14871 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 128087 event pairs, 6144 based on Foata normal form. 1865/15457 useless extension candidates. Maximal degree in co-relation 48242. Up to 13971 conditions per place. [2022-11-25 15:34:14,591 INFO L137 encePairwiseOnDemand]: 384/388 looper letters, 74 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-11-25 15:34:14,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 465 flow [2022-11-25 15:34:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2022-11-25 15:34:14,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5189003436426117 [2022-11-25 15:34:14,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2022-11-25 15:34:14,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2022-11-25 15:34:14,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:14,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2022-11-25 15:34:14,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:14,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:14,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:14,608 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 253 flow. Second operand 3 states and 604 transitions. [2022-11-25 15:34:14,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 465 flow [2022-11-25 15:34:14,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 459 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:14,629 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 262 flow [2022-11-25 15:34:14,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2022-11-25 15:34:14,631 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2022-11-25 15:34:14,631 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 262 flow [2022-11-25 15:34:14,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:14,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:14,632 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1] [2022-11-25 15:34:14,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 15:34:14,633 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash 239800882, now seen corresponding path program 2 times [2022-11-25 15:34:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:14,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855111531] [2022-11-25 15:34:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:14,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:34:14,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:14,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855111531] [2022-11-25 15:34:14,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855111531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:14,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567481960] [2022-11-25 15:34:14,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:34:14,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:14,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:14,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:14,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:34:14,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:34:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:14,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:34:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 15:34:14,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:34:14,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567481960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:14,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:34:14,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2022-11-25 15:34:14,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872754932] [2022-11-25 15:34:14,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:14,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:34:14,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:14,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:34:14,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:34:15,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 388 [2022-11-25 15:34:15,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:15,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:15,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 388 [2022-11-25 15:34:15,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:16,555 INFO L130 PetriNetUnfolder]: 12252/17183 cut-off events. [2022-11-25 15:34:16,555 INFO L131 PetriNetUnfolder]: For 9788/11428 co-relation queries the response was YES. [2022-11-25 15:34:16,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40244 conditions, 17183 events. 12252/17183 cut-off events. For 9788/11428 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 104479 event pairs, 8276 based on Foata normal form. 2085/12730 useless extension candidates. Maximal degree in co-relation 40226. Up to 17063 conditions per place. [2022-11-25 15:34:16,631 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 53 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-11-25 15:34:16,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 354 flow [2022-11-25 15:34:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2022-11-25 15:34:16,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4896907216494845 [2022-11-25 15:34:16,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2022-11-25 15:34:16,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2022-11-25 15:34:16,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:16,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2022-11-25 15:34:16,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 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 15:34:16,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:16,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:16,648 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 262 flow. Second operand 3 states and 570 transitions. [2022-11-25 15:34:16,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 354 flow [2022-11-25 15:34:16,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 336 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-25 15:34:16,654 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 230 flow [2022-11-25 15:34:16,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2022-11-25 15:34:16,655 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2022-11-25 15:34:16,655 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 230 flow [2022-11-25 15:34:16,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:16,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:16,656 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:16,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:16,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:16,862 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:16,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2100583008, now seen corresponding path program 1 times [2022-11-25 15:34:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:16,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815617381] [2022-11-25 15:34:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:16,925 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 15:34:16,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:16,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815617381] [2022-11-25 15:34:16,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815617381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:16,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:16,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:34:16,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915354946] [2022-11-25 15:34:16,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:16,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:16,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:16,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:16,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:16,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 388 [2022-11-25 15:34:16,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:16,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:16,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 388 [2022-11-25 15:34:16,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:18,923 INFO L130 PetriNetUnfolder]: 16714/23829 cut-off events. [2022-11-25 15:34:18,924 INFO L131 PetriNetUnfolder]: For 6726/8330 co-relation queries the response was YES. [2022-11-25 15:34:18,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55340 conditions, 23829 events. 16714/23829 cut-off events. For 6726/8330 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 152419 event pairs, 8504 based on Foata normal form. 1604/17772 useless extension candidates. Maximal degree in co-relation 55325. Up to 16106 conditions per place. [2022-11-25 15:34:19,245 INFO L137 encePairwiseOnDemand]: 384/388 looper letters, 71 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-11-25 15:34:19,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 429 flow [2022-11-25 15:34:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2022-11-25 15:34:19,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5146048109965635 [2022-11-25 15:34:19,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2022-11-25 15:34:19,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2022-11-25 15:34:19,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:19,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2022-11-25 15:34:19,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:19,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:19,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:19,254 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 230 flow. Second operand 3 states and 599 transitions. [2022-11-25 15:34:19,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 429 flow [2022-11-25 15:34:19,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:19,262 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 243 flow [2022-11-25 15:34:19,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2022-11-25 15:34:19,263 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2022-11-25 15:34:19,263 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 243 flow [2022-11-25 15:34:19,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:19,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:19,264 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 15:34:19,265 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2024910118, now seen corresponding path program 1 times [2022-11-25 15:34:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:19,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219491559] [2022-11-25 15:34:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:19,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:19,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219491559] [2022-11-25 15:34:19,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219491559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:19,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:19,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:34:19,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006826596] [2022-11-25 15:34:19,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:19,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:34:19,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:19,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:34:19,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:34:19,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 388 [2022-11-25 15:34:19,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:19,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:19,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 388 [2022-11-25 15:34:19,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:21,524 INFO L130 PetriNetUnfolder]: 18236/25403 cut-off events. [2022-11-25 15:34:21,524 INFO L131 PetriNetUnfolder]: For 8322/9636 co-relation queries the response was YES. [2022-11-25 15:34:21,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62929 conditions, 25403 events. 18236/25403 cut-off events. For 8322/9636 co-relation queries the response was YES. Maximal size of possible extension queue 1145. Compared 153396 event pairs, 12422 based on Foata normal form. 1314/18164 useless extension candidates. Maximal degree in co-relation 62913. Up to 24194 conditions per place. [2022-11-25 15:34:21,627 INFO L137 encePairwiseOnDemand]: 381/388 looper letters, 74 selfloop transitions, 13 changer transitions 2/92 dead transitions. [2022-11-25 15:34:21,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 516 flow [2022-11-25 15:34:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:34:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:34:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 931 transitions. [2022-11-25 15:34:21,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47989690721649486 [2022-11-25 15:34:21,633 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 931 transitions. [2022-11-25 15:34:21,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 931 transitions. [2022-11-25 15:34:21,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:21,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 931 transitions. [2022-11-25 15:34:21,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.2) internal successors, (931), 5 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:21,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:21,641 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:21,642 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 243 flow. Second operand 5 states and 931 transitions. [2022-11-25 15:34:21,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 516 flow [2022-11-25 15:34:21,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 92 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:21,663 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 280 flow [2022-11-25 15:34:21,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2022-11-25 15:34:21,663 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2022-11-25 15:34:21,664 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 280 flow [2022-11-25 15:34:21,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:21,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:21,664 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:21,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 15:34:21,665 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:21,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1919312490, now seen corresponding path program 1 times [2022-11-25 15:34:21,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:21,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933752660] [2022-11-25 15:34:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:21,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:34:21,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:21,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933752660] [2022-11-25 15:34:21,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933752660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:21,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112948643] [2022-11-25 15:34:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:21,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:21,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:21,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:21,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:34:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:21,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:34:21,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:21,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:22,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112948643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:22,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:22,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 13 [2022-11-25 15:34:22,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372891302] [2022-11-25 15:34:22,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:22,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:34:22,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:34:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:34:22,535 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 388 [2022-11-25 15:34:22,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 280 flow. Second operand has 13 states, 13 states have (on average 170.53846153846155) internal successors, (2217), 13 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:22,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:22,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 388 [2022-11-25 15:34:22,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:25,055 INFO L130 PetriNetUnfolder]: 14988/20995 cut-off events. [2022-11-25 15:34:25,055 INFO L131 PetriNetUnfolder]: For 8266/9386 co-relation queries the response was YES. [2022-11-25 15:34:25,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52951 conditions, 20995 events. 14988/20995 cut-off events. For 8266/9386 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 130756 event pairs, 844 based on Foata normal form. 1352/17004 useless extension candidates. Maximal degree in co-relation 52932. Up to 5648 conditions per place. [2022-11-25 15:34:25,151 INFO L137 encePairwiseOnDemand]: 378/388 looper letters, 205 selfloop transitions, 23 changer transitions 9/240 dead transitions. [2022-11-25 15:34:25,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 240 transitions, 1307 flow [2022-11-25 15:34:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:34:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 15:34:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2725 transitions. [2022-11-25 15:34:25,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.468213058419244 [2022-11-25 15:34:25,160 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2725 transitions. [2022-11-25 15:34:25,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2725 transitions. [2022-11-25 15:34:25,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:25,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2725 transitions. [2022-11-25 15:34:25,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 181.66666666666666) internal successors, (2725), 15 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:25,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 388.0) internal successors, (6208), 16 states have internal predecessors, (6208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:25,181 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 388.0) internal successors, (6208), 16 states have internal predecessors, (6208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:25,181 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 280 flow. Second operand 15 states and 2725 transitions. [2022-11-25 15:34:25,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 240 transitions, 1307 flow [2022-11-25 15:34:25,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 240 transitions, 1286 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:25,213 INFO L231 Difference]: Finished difference. Result has 78 places, 65 transitions, 324 flow [2022-11-25 15:34:25,213 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=324, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2022-11-25 15:34:25,214 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2022-11-25 15:34:25,214 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 324 flow [2022-11-25 15:34:25,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.53846153846155) internal successors, (2217), 13 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:25,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:25,215 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:25,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 15:34:25,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 15:34:25,421 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash -25620328, now seen corresponding path program 1 times [2022-11-25 15:34:25,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:25,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167705049] [2022-11-25 15:34:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:25,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:25,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167705049] [2022-11-25 15:34:25,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167705049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:25,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494524800] [2022-11-25 15:34:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:25,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:25,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:25,517 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:25,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:34:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:25,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:34:25,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:25,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:34:25,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494524800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:25,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:34:25,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 7 [2022-11-25 15:34:25,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855836369] [2022-11-25 15:34:25,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:34:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:25,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:34:25,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:34:25,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 388 [2022-11-25 15:34:25,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:25,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:25,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 388 [2022-11-25 15:34:25,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:27,296 INFO L130 PetriNetUnfolder]: 11566/16621 cut-off events. [2022-11-25 15:34:27,297 INFO L131 PetriNetUnfolder]: For 12028/12902 co-relation queries the response was YES. [2022-11-25 15:34:27,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45453 conditions, 16621 events. 11566/16621 cut-off events. For 12028/12902 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 101430 event pairs, 8732 based on Foata normal form. 874/13971 useless extension candidates. Maximal degree in co-relation 45433. Up to 16354 conditions per place. [2022-11-25 15:34:27,369 INFO L137 encePairwiseOnDemand]: 380/388 looper letters, 46 selfloop transitions, 9 changer transitions 27/85 dead transitions. [2022-11-25 15:34:27,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 536 flow [2022-11-25 15:34:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:34:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:34:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 921 transitions. [2022-11-25 15:34:27,374 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4747422680412371 [2022-11-25 15:34:27,374 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 921 transitions. [2022-11-25 15:34:27,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 921 transitions. [2022-11-25 15:34:27,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:27,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 921 transitions. [2022-11-25 15:34:27,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.2) internal successors, (921), 5 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:27,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:27,381 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:27,381 INFO L175 Difference]: Start difference. First operand has 78 places, 65 transitions, 324 flow. Second operand 5 states and 921 transitions. [2022-11-25 15:34:27,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 536 flow [2022-11-25 15:34:27,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 85 transitions, 503 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-25 15:34:27,413 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 270 flow [2022-11-25 15:34:27,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2022-11-25 15:34:27,414 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2022-11-25 15:34:27,414 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 270 flow [2022-11-25 15:34:27,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:27,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:27,415 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:27,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:27,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 15:34:27,621 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1574274268, now seen corresponding path program 1 times [2022-11-25 15:34:27,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:27,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544886741] [2022-11-25 15:34:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:27,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:34:27,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544886741] [2022-11-25 15:34:27,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544886741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132018856] [2022-11-25 15:34:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:27,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:27,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:27,699 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:27,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:34:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:34:27,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:27,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:27,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132018856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:27,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:27,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 13 [2022-11-25 15:34:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800093469] [2022-11-25 15:34:27,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:27,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:34:27,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:34:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:34:28,401 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 388 [2022-11-25 15:34:28,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 58 transitions, 270 flow. Second operand has 13 states, 13 states have (on average 170.84615384615384) internal successors, (2221), 13 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:28,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:28,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 388 [2022-11-25 15:34:28,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:30,786 INFO L130 PetriNetUnfolder]: 13547/19181 cut-off events. [2022-11-25 15:34:30,786 INFO L131 PetriNetUnfolder]: For 13149/14023 co-relation queries the response was YES. [2022-11-25 15:34:30,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55157 conditions, 19181 events. 13547/19181 cut-off events. For 13149/14023 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 116907 event pairs, 3122 based on Foata normal form. 1010/17220 useless extension candidates. Maximal degree in co-relation 55135. Up to 5859 conditions per place. [2022-11-25 15:34:30,873 INFO L137 encePairwiseOnDemand]: 376/388 looper letters, 98 selfloop transitions, 16 changer transitions 76/192 dead transitions. [2022-11-25 15:34:30,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 192 transitions, 1138 flow [2022-11-25 15:34:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:34:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 15:34:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2506 transitions. [2022-11-25 15:34:30,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46134020618556704 [2022-11-25 15:34:30,881 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2506 transitions. [2022-11-25 15:34:30,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2506 transitions. [2022-11-25 15:34:30,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:30,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2506 transitions. [2022-11-25 15:34:30,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 179.0) internal successors, (2506), 14 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:30,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 388.0) internal successors, (5820), 15 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:30,897 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 388.0) internal successors, (5820), 15 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:30,898 INFO L175 Difference]: Start difference. First operand has 79 places, 58 transitions, 270 flow. Second operand 14 states and 2506 transitions. [2022-11-25 15:34:30,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 192 transitions, 1138 flow [2022-11-25 15:34:31,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 192 transitions, 1058 flow, removed 31 selfloop flow, removed 7 redundant places. [2022-11-25 15:34:31,029 INFO L231 Difference]: Finished difference. Result has 78 places, 54 transitions, 274 flow [2022-11-25 15:34:31,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=274, PETRI_PLACES=78, PETRI_TRANSITIONS=54} [2022-11-25 15:34:31,030 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2022-11-25 15:34:31,030 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 54 transitions, 274 flow [2022-11-25 15:34:31,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.84615384615384) internal successors, (2221), 13 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:31,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:31,030 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:31,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:31,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 15:34:31,231 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1555020005, now seen corresponding path program 1 times [2022-11-25 15:34:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:31,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347389725] [2022-11-25 15:34:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:31,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:31,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:31,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347389725] [2022-11-25 15:34:31,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347389725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:31,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019289060] [2022-11-25 15:34:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:31,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:31,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:31,345 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:31,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:34:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:31,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:34:31,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:31,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:31,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019289060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:31,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:31,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:34:31,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821631052] [2022-11-25 15:34:31,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:31,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:34:31,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:34:31,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:34:31,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 388 [2022-11-25 15:34:31,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 54 transitions, 274 flow. Second operand has 7 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:31,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:31,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 388 [2022-11-25 15:34:31,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:35,227 INFO L130 PetriNetUnfolder]: 30137/41485 cut-off events. [2022-11-25 15:34:35,227 INFO L131 PetriNetUnfolder]: For 35197/37777 co-relation queries the response was YES. [2022-11-25 15:34:35,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124850 conditions, 41485 events. 30137/41485 cut-off events. For 35197/37777 co-relation queries the response was YES. Maximal size of possible extension queue 1348. Compared 263591 event pairs, 5804 based on Foata normal form. 2580/38943 useless extension candidates. Maximal degree in co-relation 124830. Up to 11898 conditions per place. [2022-11-25 15:34:35,670 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 141 selfloop transitions, 5 changer transitions 0/148 dead transitions. [2022-11-25 15:34:35,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 148 transitions, 974 flow [2022-11-25 15:34:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:34:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:34:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1207 transitions. [2022-11-25 15:34:35,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5184707903780069 [2022-11-25 15:34:35,675 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1207 transitions. [2022-11-25 15:34:35,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1207 transitions. [2022-11-25 15:34:35,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:35,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1207 transitions. [2022-11-25 15:34:35,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.16666666666666) internal successors, (1207), 6 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:35,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:35,683 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:35,683 INFO L175 Difference]: Start difference. First operand has 78 places, 54 transitions, 274 flow. Second operand 6 states and 1207 transitions. [2022-11-25 15:34:35,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 148 transitions, 974 flow [2022-11-25 15:34:35,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 148 transitions, 919 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-11-25 15:34:35,841 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 283 flow [2022-11-25 15:34:35,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2022-11-25 15:34:35,842 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2022-11-25 15:34:35,842 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 283 flow [2022-11-25 15:34:35,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:35,842 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:35,843 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:35,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 15:34:36,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 15:34:36,048 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash -618451926, now seen corresponding path program 1 times [2022-11-25 15:34:36,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:36,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971246665] [2022-11-25 15:34:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:36,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:36,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971246665] [2022-11-25 15:34:36,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971246665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:36,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:36,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:34:36,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181200410] [2022-11-25 15:34:36,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:36,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:36,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 388 [2022-11-25 15:34:36,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:36,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:36,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 388 [2022-11-25 15:34:36,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:38,674 INFO L130 PetriNetUnfolder]: 24201/34109 cut-off events. [2022-11-25 15:34:38,674 INFO L131 PetriNetUnfolder]: For 35473/37013 co-relation queries the response was YES. [2022-11-25 15:34:38,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99898 conditions, 34109 events. 24201/34109 cut-off events. For 35473/37013 co-relation queries the response was YES. Maximal size of possible extension queue 1115. Compared 218500 event pairs, 1740 based on Foata normal form. 3236/33951 useless extension candidates. Maximal degree in co-relation 99878. Up to 30592 conditions per place. [2022-11-25 15:34:39,031 INFO L137 encePairwiseOnDemand]: 386/388 looper letters, 69 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2022-11-25 15:34:39,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 489 flow [2022-11-25 15:34:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2022-11-25 15:34:39,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5077319587628866 [2022-11-25 15:34:39,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2022-11-25 15:34:39,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2022-11-25 15:34:39,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:39,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2022-11-25 15:34:39,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:39,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:39,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:39,041 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 283 flow. Second operand 3 states and 591 transitions. [2022-11-25 15:34:39,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 489 flow [2022-11-25 15:34:39,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 72 transitions, 462 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:39,285 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 251 flow [2022-11-25 15:34:39,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2022-11-25 15:34:39,286 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2022-11-25 15:34:39,286 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 251 flow [2022-11-25 15:34:39,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:39,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:39,287 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:39,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 15:34:39,287 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1626748592, now seen corresponding path program 2 times [2022-11-25 15:34:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:39,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543859610] [2022-11-25 15:34:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:39,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:39,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543859610] [2022-11-25 15:34:39,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543859610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202408145] [2022-11-25 15:34:39,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:34:39,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:39,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:39,386 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:39,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:34:39,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:34:39,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:34:39,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:34:39,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:34:39,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202408145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:39,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:39,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 6 [2022-11-25 15:34:39,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630821840] [2022-11-25 15:34:39,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:39,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:34:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:34:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:34:39,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 388 [2022-11-25 15:34:39,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 251 flow. Second operand has 7 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:39,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:39,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 388 [2022-11-25 15:34:39,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:43,576 INFO L130 PetriNetUnfolder]: 33385/46685 cut-off events. [2022-11-25 15:34:43,576 INFO L131 PetriNetUnfolder]: For 34121/36173 co-relation queries the response was YES. [2022-11-25 15:34:43,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128726 conditions, 46685 events. 33385/46685 cut-off events. For 34121/36173 co-relation queries the response was YES. Maximal size of possible extension queue 1384. Compared 300226 event pairs, 5132 based on Foata normal form. 2052/44495 useless extension candidates. Maximal degree in co-relation 128706. Up to 10704 conditions per place. [2022-11-25 15:34:43,777 INFO L137 encePairwiseOnDemand]: 382/388 looper letters, 103 selfloop transitions, 8 changer transitions 20/133 dead transitions. [2022-11-25 15:34:43,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 133 transitions, 829 flow [2022-11-25 15:34:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:34:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:34:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1347 transitions. [2022-11-25 15:34:43,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4959499263622975 [2022-11-25 15:34:43,780 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1347 transitions. [2022-11-25 15:34:43,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1347 transitions. [2022-11-25 15:34:43,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:43,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1347 transitions. [2022-11-25 15:34:43,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 192.42857142857142) internal successors, (1347), 7 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:43,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 388.0) internal successors, (3104), 8 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:43,788 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 388.0) internal successors, (3104), 8 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:43,789 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 251 flow. Second operand 7 states and 1347 transitions. [2022-11-25 15:34:43,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 133 transitions, 829 flow [2022-11-25 15:34:44,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 133 transitions, 828 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:44,016 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 266 flow [2022-11-25 15:34:44,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2022-11-25 15:34:44,016 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2022-11-25 15:34:44,017 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 266 flow [2022-11-25 15:34:44,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:44,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:44,017 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:44,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:44,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:44,223 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2022-11-25 15:34:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1542338560, now seen corresponding path program 2 times [2022-11-25 15:34:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:44,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747448305] [2022-11-25 15:34:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:44,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 15:34:44,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:44,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747448305] [2022-11-25 15:34:44,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747448305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:44,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075689180] [2022-11-25 15:34:44,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:34:44,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:44,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:44,394 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:44,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8e59829-b5aa-45ca-a075-8d71ece91fb7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:34:44,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:34:44,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:44,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:34:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 15:34:44,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 15:34:44,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075689180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:44,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:44,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 2, 2] total 7 [2022-11-25 15:34:44,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752016547] [2022-11-25 15:34:44,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:44,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:34:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:34:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:34:45,049 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 388 [2022-11-25 15:34:45,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 266 flow. Second operand has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:45,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:45,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 388 [2022-11-25 15:34:45,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand