./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:46:51,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:46:51,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:46:51,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:46:51,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:46:51,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:46:51,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:46:51,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:46:51,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:46:51,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:46:51,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:46:51,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:46:51,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:46:51,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:46:51,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:46:51,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:46:51,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:46:51,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:46:51,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:46:51,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:46:51,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:46:51,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:46:51,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:46:51,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:46:51,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:46:51,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:46:51,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:46:51,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:46:51,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:46:51,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:46:51,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:46:51,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:46:51,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:46:51,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:46:51,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:46:51,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:46:51,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:46:51,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:46:51,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:46:51,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:46:51,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:46:51,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 11:46:51,527 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:46:51,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:46:51,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:46:51,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:46:51,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:46:51,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:46:51,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:46:51,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:46:51,529 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:46:51,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:46:51,529 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:46:51,530 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:46:51,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:46:51,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:46:51,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:46:51,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:46:51,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:46:51,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:46:51,531 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 11:46:51,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:46:51,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:46:51,531 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:46:51,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:46:51,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:46:51,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:46:51,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:46:51,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:46:51,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:46:51,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:46:51,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:46:51,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:46:51,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:46:51,533 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:46:51,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:46:51,533 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:46:51,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:46:51,534 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:46:51,534 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_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 [2022-12-13 11:46:51,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:46:51,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:46:51,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:46:51,746 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:46:51,746 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:46:51,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2022-12-13 11:46:54,402 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:46:54,588 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:46:54,589 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2022-12-13 11:46:54,594 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/data/842e587db/2d32c45d2ec4433a8c81e7cab3e93a1d/FLAG0ce9950fa [2022-12-13 11:46:54,608 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/data/842e587db/2d32c45d2ec4433a8c81e7cab3e93a1d [2022-12-13 11:46:54,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:46:54,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:46:54,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:46:54,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:46:54,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:46:54,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38bcd09a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54, skipping insertion in model container [2022-12-13 11:46:54,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:46:54,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:46:54,749 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,753 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,756 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,756 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,758 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,765 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_70ff92bc-774e-4cd8-bdeb-227f8302d61e/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-12-13 11:46:54,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:46:54,773 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:46:54,782 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,783 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,783 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,783 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,784 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,785 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,785 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,785 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:46:54,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:46:54,792 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_70ff92bc-774e-4cd8-bdeb-227f8302d61e/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-12-13 11:46:54,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:46:54,802 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:46:54,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54 WrapperNode [2022-12-13 11:46:54,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:46:54,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:46:54,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:46:54,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:46:54,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,827 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-12-13 11:46:54,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:46:54,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:46:54,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:46:54,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:46:54,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,844 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:46:54,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:46:54,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:46:54,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:46:54,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (1/1) ... [2022-12-13 11:46:54,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:46:54,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:46:54,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:46:54,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:46:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:46:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:46:54,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:46:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:46:54,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:46:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 11:46:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 11:46:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:46:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:46:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:46:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:46:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:46:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:46:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:46:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:46:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:46:54,903 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:46:54,980 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:46:54,981 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:46:55,184 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:46:55,235 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:46:55,235 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 11:46:55,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:46:55 BoogieIcfgContainer [2022-12-13 11:46:55,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:46:55,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:46:55,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:46:55,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:46:55,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:46:54" (1/3) ... [2022-12-13 11:46:55,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193f5e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:46:55, skipping insertion in model container [2022-12-13 11:46:55,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:46:54" (2/3) ... [2022-12-13 11:46:55,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193f5e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:46:55, skipping insertion in model container [2022-12-13 11:46:55,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:46:55" (3/3) ... [2022-12-13 11:46:55,243 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2022-12-13 11:46:55,250 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:46:55,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:46:55,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-12-13 11:46:55,258 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:46:55,310 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 11:46:55,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 140 transitions, 304 flow [2022-12-13 11:46:55,394 INFO L130 PetriNetUnfolder]: 16/137 cut-off events. [2022-12-13 11:46:55,395 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:46:55,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 16/137 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 205 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2022-12-13 11:46:55,400 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 140 transitions, 304 flow [2022-12-13 11:46:55,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 116 transitions, 247 flow [2022-12-13 11:46:55,409 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:46:55,420 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 116 transitions, 247 flow [2022-12-13 11:46:55,423 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 116 transitions, 247 flow [2022-12-13 11:46:55,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 247 flow [2022-12-13 11:46:55,453 INFO L130 PetriNetUnfolder]: 15/116 cut-off events. [2022-12-13 11:46:55,454 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:46:55,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 116 events. 15/116 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 203 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2022-12-13 11:46:55,458 INFO L119 LiptonReduction]: Number of co-enabled transitions 4158 [2022-12-13 11:46:59,002 INFO L134 LiptonReduction]: Checked pairs total: 4316 [2022-12-13 11:46:59,002 INFO L136 LiptonReduction]: Total number of compositions: 116 [2022-12-13 11:46:59,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:46:59,016 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;@4a47103f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:46:59,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2022-12-13 11:46:59,018 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-12-13 11:46:59,018 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:46:59,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:46:59,018 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:46:59,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:46:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:46:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash 591075, now seen corresponding path program 1 times [2022-12-13 11:46:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:46:59,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120777180] [2022-12-13 11:46:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:46:59,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:46:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:46:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:59,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:46:59,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120777180] [2022-12-13 11:46:59,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120777180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:46:59,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:46:59,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:46:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277270233] [2022-12-13 11:46:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:46:59,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:46:59,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:46:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:46:59,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:46:59,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 256 [2022-12-13 11:46:59,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:59,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:46:59,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 256 [2022-12-13 11:46:59,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:46:59,557 INFO L130 PetriNetUnfolder]: 1961/2966 cut-off events. [2022-12-13 11:46:59,557 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2022-12-13 11:46:59,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6137 conditions, 2966 events. 1961/2966 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 16194 event pairs, 653 based on Foata normal form. 0/1086 useless extension candidates. Maximal degree in co-relation 5320. Up to 1617 conditions per place. [2022-12-13 11:46:59,574 INFO L137 encePairwiseOnDemand]: 240/256 looper letters, 40 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2022-12-13 11:46:59,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 227 flow [2022-12-13 11:46:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:46:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:46:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2022-12-13 11:46:59,586 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5026041666666666 [2022-12-13 11:46:59,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2022-12-13 11:46:59,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2022-12-13 11:46:59,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:46:59,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2022-12-13 11:46:59,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:59,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:59,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:59,601 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 73 flow. Second operand 3 states and 386 transitions. [2022-12-13 11:46:59,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 227 flow [2022-12-13 11:46:59,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 211 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 11:46:59,611 INFO L231 Difference]: Finished difference. Result has 35 places, 38 transitions, 152 flow [2022-12-13 11:46:59,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=35, PETRI_TRANSITIONS=38} [2022-12-13 11:46:59,617 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2022-12-13 11:46:59,617 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 38 transitions, 152 flow [2022-12-13 11:46:59,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:59,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:46:59,618 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:46:59,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:46:59,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:46:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:46:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash 18324980, now seen corresponding path program 1 times [2022-12-13 11:46:59,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:46:59,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145041070] [2022-12-13 11:46:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:46:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:46:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:46:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:59,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:46:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145041070] [2022-12-13 11:46:59,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145041070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:46:59,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:46:59,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:46:59,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944625072] [2022-12-13 11:46:59,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:46:59,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:46:59,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:46:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:46:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:46:59,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 256 [2022-12-13 11:46:59,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 38 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:59,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:46:59,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 256 [2022-12-13 11:46:59,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:46:59,986 INFO L130 PetriNetUnfolder]: 1625/2472 cut-off events. [2022-12-13 11:46:59,986 INFO L131 PetriNetUnfolder]: For 1034/1034 co-relation queries the response was YES. [2022-12-13 11:46:59,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7130 conditions, 2472 events. 1625/2472 cut-off events. For 1034/1034 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 12742 event pairs, 1019 based on Foata normal form. 0/1736 useless extension candidates. Maximal degree in co-relation 1757. Up to 2472 conditions per place. [2022-12-13 11:46:59,998 INFO L137 encePairwiseOnDemand]: 254/256 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2022-12-13 11:46:59,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 214 flow [2022-12-13 11:46:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:46:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:47:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2022-12-13 11:47:00,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2022-12-13 11:47:00,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2022-12-13 11:47:00,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2022-12-13 11:47:00,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:00,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2022-12-13 11:47:00,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,003 INFO L175 Difference]: Start difference. First operand has 35 places, 38 transitions, 152 flow. Second operand 3 states and 344 transitions. [2022-12-13 11:47:00,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 214 flow [2022-12-13 11:47:00,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:47:00,012 INFO L231 Difference]: Finished difference. Result has 34 places, 36 transitions, 126 flow [2022-12-13 11:47:00,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=34, PETRI_TRANSITIONS=36} [2022-12-13 11:47:00,013 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-12-13 11:47:00,013 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 36 transitions, 126 flow [2022-12-13 11:47:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:00,013 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:47:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:47:00,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:47:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash 591076, now seen corresponding path program 1 times [2022-12-13 11:47:00,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:00,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280752446] [2022-12-13 11:47:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:00,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:00,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280752446] [2022-12-13 11:47:00,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280752446] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:47:00,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:47:00,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:47:00,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47225175] [2022-12-13 11:47:00,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:47:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:47:00,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:00,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:47:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:47:00,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 256 [2022-12-13 11:47:00,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:00,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 256 [2022-12-13 11:47:00,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:00,272 INFO L130 PetriNetUnfolder]: 1551/2398 cut-off events. [2022-12-13 11:47:00,272 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-12-13 11:47:00,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6356 conditions, 2398 events. 1551/2398 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 13184 event pairs, 201 based on Foata normal form. 0/1340 useless extension candidates. Maximal degree in co-relation 6348. Up to 2321 conditions per place. [2022-12-13 11:47:00,282 INFO L137 encePairwiseOnDemand]: 247/256 looper letters, 47 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2022-12-13 11:47:00,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 269 flow [2022-12-13 11:47:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:47:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:47:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2022-12-13 11:47:00,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2022-12-13 11:47:00,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2022-12-13 11:47:00,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2022-12-13 11:47:00,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:00,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2022-12-13 11:47:00,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,286 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 126 flow. Second operand 3 states and 378 transitions. [2022-12-13 11:47:00,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 269 flow [2022-12-13 11:47:00,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:47:00,287 INFO L231 Difference]: Finished difference. Result has 36 places, 39 transitions, 165 flow [2022-12-13 11:47:00,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=36, PETRI_TRANSITIONS=39} [2022-12-13 11:47:00,288 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2022-12-13 11:47:00,288 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 39 transitions, 165 flow [2022-12-13 11:47:00,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,288 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:00,288 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:47:00,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:47:00,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:47:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash 18324967, now seen corresponding path program 1 times [2022-12-13 11:47:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:00,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150411034] [2022-12-13 11:47:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:00,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:00,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:00,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150411034] [2022-12-13 11:47:00,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150411034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:47:00,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506242416] [2022-12-13 11:47:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:00,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:00,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:47:00,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:47:00,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:47:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:00,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:47:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:00,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:00,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506242416] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:00,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:00,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 11:47:00,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72023850] [2022-12-13 11:47:00,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:47:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:47:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:47:00,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 256 [2022-12-13 11:47:00,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 39 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 102.5) internal successors, (820), 8 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:00,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:00,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 256 [2022-12-13 11:47:00,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:01,417 INFO L130 PetriNetUnfolder]: 3490/5287 cut-off events. [2022-12-13 11:47:01,417 INFO L131 PetriNetUnfolder]: For 478/478 co-relation queries the response was YES. [2022-12-13 11:47:01,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14387 conditions, 5287 events. 3490/5287 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 30238 event pairs, 121 based on Foata normal form. 14/3037 useless extension candidates. Maximal degree in co-relation 14377. Up to 2327 conditions per place. [2022-12-13 11:47:01,441 INFO L137 encePairwiseOnDemand]: 240/256 looper letters, 105 selfloop transitions, 56 changer transitions 0/161 dead transitions. [2022-12-13 11:47:01,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 161 transitions, 912 flow [2022-12-13 11:47:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:47:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:47:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 967 transitions. [2022-12-13 11:47:01,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47216796875 [2022-12-13 11:47:01,443 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 967 transitions. [2022-12-13 11:47:01,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 967 transitions. [2022-12-13 11:47:01,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:01,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 967 transitions. [2022-12-13 11:47:01,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:01,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:01,448 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:01,448 INFO L175 Difference]: Start difference. First operand has 36 places, 39 transitions, 165 flow. Second operand 8 states and 967 transitions. [2022-12-13 11:47:01,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 161 transitions, 912 flow [2022-12-13 11:47:01,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 161 transitions, 908 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:47:01,451 INFO L231 Difference]: Finished difference. Result has 49 places, 95 transitions, 715 flow [2022-12-13 11:47:01,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=715, PETRI_PLACES=49, PETRI_TRANSITIONS=95} [2022-12-13 11:47:01,452 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2022-12-13 11:47:01,452 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 95 transitions, 715 flow [2022-12-13 11:47:01,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.5) internal successors, (820), 8 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:01,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:01,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:47:01,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:47:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:01,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:47:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 18324979, now seen corresponding path program 1 times [2022-12-13 11:47:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:01,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378306661] [2022-12-13 11:47:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:01,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:01,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378306661] [2022-12-13 11:47:01,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378306661] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:47:01,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065167149] [2022-12-13 11:47:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:01,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:47:01,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:47:01,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:47:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:01,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:47:01,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:01,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:01,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065167149] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:01,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:01,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 11:47:01,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034910211] [2022-12-13 11:47:01,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:01,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:47:01,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:47:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:47:02,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 256 [2022-12-13 11:47:02,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 95 transitions, 715 flow. Second operand has 8 states, 8 states have (on average 100.5) internal successors, (804), 8 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:02,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:02,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 256 [2022-12-13 11:47:02,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:02,954 INFO L130 PetriNetUnfolder]: 5432/8129 cut-off events. [2022-12-13 11:47:02,955 INFO L131 PetriNetUnfolder]: For 10480/10480 co-relation queries the response was YES. [2022-12-13 11:47:02,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32291 conditions, 8129 events. 5432/8129 cut-off events. For 10480/10480 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 47970 event pairs, 239 based on Foata normal form. 88/7365 useless extension candidates. Maximal degree in co-relation 32273. Up to 3503 conditions per place. [2022-12-13 11:47:03,004 INFO L137 encePairwiseOnDemand]: 241/256 looper letters, 150 selfloop transitions, 88 changer transitions 0/238 dead transitions. [2022-12-13 11:47:03,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 238 transitions, 2051 flow [2022-12-13 11:47:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:47:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:47:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2022-12-13 11:47:03,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.451171875 [2022-12-13 11:47:03,007 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2022-12-13 11:47:03,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2022-12-13 11:47:03,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:03,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2022-12-13 11:47:03,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.5) internal successors, (924), 8 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:03,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:03,012 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:03,013 INFO L175 Difference]: Start difference. First operand has 49 places, 95 transitions, 715 flow. Second operand 8 states and 924 transitions. [2022-12-13 11:47:03,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 238 transitions, 2051 flow [2022-12-13 11:47:03,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 238 transitions, 1983 flow, removed 32 selfloop flow, removed 1 redundant places. [2022-12-13 11:47:03,049 INFO L231 Difference]: Finished difference. Result has 58 places, 154 transitions, 1543 flow [2022-12-13 11:47:03,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1543, PETRI_PLACES=58, PETRI_TRANSITIONS=154} [2022-12-13 11:47:03,050 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2022-12-13 11:47:03,050 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 154 transitions, 1543 flow [2022-12-13 11:47:03,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.5) internal successors, (804), 8 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:03,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:03,051 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-13 11:47:03,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:47:03,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:03,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:47:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:03,253 INFO L85 PathProgramCache]: Analyzing trace with hash 451801463, now seen corresponding path program 1 times [2022-12-13 11:47:03,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:03,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37682567] [2022-12-13 11:47:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:03,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:03,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:03,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37682567] [2022-12-13 11:47:03,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37682567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:47:03,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305811248] [2022-12-13 11:47:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:03,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:03,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:47:03,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:47:03,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:47:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:47:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:03,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:03,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305811248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:03,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:03,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-13 11:47:03,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894521309] [2022-12-13 11:47:03,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:03,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:47:03,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:03,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:47:03,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:47:03,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 256 [2022-12-13 11:47:03,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 154 transitions, 1543 flow. Second operand has 11 states, 11 states have (on average 100.9090909090909) internal successors, (1110), 11 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:03,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:03,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 256 [2022-12-13 11:47:03,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:05,049 INFO L130 PetriNetUnfolder]: 6530/9563 cut-off events. [2022-12-13 11:47:05,050 INFO L131 PetriNetUnfolder]: For 35641/35641 co-relation queries the response was YES. [2022-12-13 11:47:05,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43870 conditions, 9563 events. 6530/9563 cut-off events. For 35641/35641 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 54966 event pairs, 137 based on Foata normal form. 906/10469 useless extension candidates. Maximal degree in co-relation 43848. Up to 3919 conditions per place. [2022-12-13 11:47:05,090 INFO L137 encePairwiseOnDemand]: 240/256 looper letters, 145 selfloop transitions, 140 changer transitions 0/285 dead transitions. [2022-12-13 11:47:05,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 285 transitions, 2912 flow [2022-12-13 11:47:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:47:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:47:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1051 transitions. [2022-12-13 11:47:05,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4561631944444444 [2022-12-13 11:47:05,092 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1051 transitions. [2022-12-13 11:47:05,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1051 transitions. [2022-12-13 11:47:05,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:05,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1051 transitions. [2022-12-13 11:47:05,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:05,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:05,096 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:05,096 INFO L175 Difference]: Start difference. First operand has 58 places, 154 transitions, 1543 flow. Second operand 9 states and 1051 transitions. [2022-12-13 11:47:05,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 285 transitions, 2912 flow [2022-12-13 11:47:05,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 285 transitions, 2739 flow, removed 80 selfloop flow, removed 4 redundant places. [2022-12-13 11:47:05,182 INFO L231 Difference]: Finished difference. Result has 67 places, 205 transitions, 2473 flow [2022-12-13 11:47:05,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2473, PETRI_PLACES=67, PETRI_TRANSITIONS=205} [2022-12-13 11:47:05,183 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2022-12-13 11:47:05,183 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 205 transitions, 2473 flow [2022-12-13 11:47:05,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 100.9090909090909) internal successors, (1110), 11 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:05,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:05,184 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:47:05,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:47:05,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:05,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:47:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:05,385 INFO L85 PathProgramCache]: Analyzing trace with hash 451801488, now seen corresponding path program 1 times [2022-12-13 11:47:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:05,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525740063] [2022-12-13 11:47:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:05,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:05,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:05,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525740063] [2022-12-13 11:47:05,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525740063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:47:05,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:47:05,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:47:05,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555554894] [2022-12-13 11:47:05,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:47:05,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:47:05,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:47:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:47:05,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 256 [2022-12-13 11:47:05,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 205 transitions, 2473 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:05,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:05,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 256 [2022-12-13 11:47:05,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:06,130 INFO L130 PetriNetUnfolder]: 3892/5893 cut-off events. [2022-12-13 11:47:06,130 INFO L131 PetriNetUnfolder]: For 46547/46547 co-relation queries the response was YES. [2022-12-13 11:47:06,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29547 conditions, 5893 events. 3892/5893 cut-off events. For 46547/46547 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32770 event pairs, 1763 based on Foata normal form. 1184/7077 useless extension candidates. Maximal degree in co-relation 29521. Up to 5893 conditions per place. [2022-12-13 11:47:06,154 INFO L137 encePairwiseOnDemand]: 252/256 looper letters, 148 selfloop transitions, 1 changer transitions 0/149 dead transitions. [2022-12-13 11:47:06,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 149 transitions, 2025 flow [2022-12-13 11:47:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:47:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:47:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2022-12-13 11:47:06,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2022-12-13 11:47:06,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2022-12-13 11:47:06,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2022-12-13 11:47:06,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:06,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2022-12-13 11:47:06,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:06,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:06,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:06,159 INFO L175 Difference]: Start difference. First operand has 67 places, 205 transitions, 2473 flow. Second operand 3 states and 364 transitions. [2022-12-13 11:47:06,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 149 transitions, 2025 flow [2022-12-13 11:47:06,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 149 transitions, 1983 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-12-13 11:47:06,259 INFO L231 Difference]: Finished difference. Result has 64 places, 149 transitions, 1687 flow [2022-12-13 11:47:06,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1687, PETRI_PLACES=64, PETRI_TRANSITIONS=149} [2022-12-13 11:47:06,260 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2022-12-13 11:47:06,260 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 149 transitions, 1687 flow [2022-12-13 11:47:06,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:06,260 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:06,260 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:47:06,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 11:47:06,261 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:47:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:06,261 INFO L85 PathProgramCache]: Analyzing trace with hash 459585585, now seen corresponding path program 1 times [2022-12-13 11:47:06,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:06,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161306193] [2022-12-13 11:47:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:06,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:06,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:06,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161306193] [2022-12-13 11:47:06,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161306193] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:47:06,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861969173] [2022-12-13 11:47:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:06,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:06,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:47:06,344 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:47:06,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:47:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:06,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:47:06,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:06,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:06,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861969173] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:06,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:06,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2022-12-13 11:47:06,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917227374] [2022-12-13 11:47:06,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:06,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 11:47:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:06,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 11:47:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:47:06,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 256 [2022-12-13 11:47:06,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 149 transitions, 1687 flow. Second operand has 9 states, 9 states have (on average 98.22222222222223) internal successors, (884), 9 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:06,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:06,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 256 [2022-12-13 11:47:06,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:08,020 INFO L130 PetriNetUnfolder]: 6791/10416 cut-off events. [2022-12-13 11:47:08,020 INFO L131 PetriNetUnfolder]: For 59555/59555 co-relation queries the response was YES. [2022-12-13 11:47:08,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50020 conditions, 10416 events. 6791/10416 cut-off events. For 59555/59555 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 65567 event pairs, 497 based on Foata normal form. 1790/12206 useless extension candidates. Maximal degree in co-relation 49993. Up to 2638 conditions per place. [2022-12-13 11:47:08,061 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 234 selfloop transitions, 190 changer transitions 0/424 dead transitions. [2022-12-13 11:47:08,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 424 transitions, 5211 flow [2022-12-13 11:47:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:47:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:47:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1335 transitions. [2022-12-13 11:47:08,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4345703125 [2022-12-13 11:47:08,064 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1335 transitions. [2022-12-13 11:47:08,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1335 transitions. [2022-12-13 11:47:08,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:08,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1335 transitions. [2022-12-13 11:47:08,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 111.25) internal successors, (1335), 12 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:08,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 256.0) internal successors, (3328), 13 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:08,069 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 256.0) internal successors, (3328), 13 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:08,069 INFO L175 Difference]: Start difference. First operand has 64 places, 149 transitions, 1687 flow. Second operand 12 states and 1335 transitions. [2022-12-13 11:47:08,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 424 transitions, 5211 flow [2022-12-13 11:47:08,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 424 transitions, 5129 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:47:08,306 INFO L231 Difference]: Finished difference. Result has 80 places, 291 transitions, 4305 flow [2022-12-13 11:47:08,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4305, PETRI_PLACES=80, PETRI_TRANSITIONS=291} [2022-12-13 11:47:08,306 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2022-12-13 11:47:08,307 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 291 transitions, 4305 flow [2022-12-13 11:47:08,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 98.22222222222223) internal successors, (884), 9 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:08,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:08,307 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 11:47:08,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:47:08,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:08,509 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:47:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:08,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1120974748, now seen corresponding path program 1 times [2022-12-13 11:47:08,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:08,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052608546] [2022-12-13 11:47:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:08,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:08,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:08,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052608546] [2022-12-13 11:47:08,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052608546] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:47:08,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967604367] [2022-12-13 11:47:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:08,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:47:08,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:47:08,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:47:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:08,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:47:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:08,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:09,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967604367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:09,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:09,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2022-12-13 11:47:09,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081883586] [2022-12-13 11:47:09,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:09,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:47:09,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:09,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:47:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:47:09,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 256 [2022-12-13 11:47:09,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 291 transitions, 4305 flow. Second operand has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:09,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:09,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 256 [2022-12-13 11:47:09,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:13,559 INFO L130 PetriNetUnfolder]: 13722/20145 cut-off events. [2022-12-13 11:47:13,560 INFO L131 PetriNetUnfolder]: For 162287/162287 co-relation queries the response was YES. [2022-12-13 11:47:13,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113641 conditions, 20145 events. 13722/20145 cut-off events. For 162287/162287 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 129358 event pairs, 687 based on Foata normal form. 2824/22969 useless extension candidates. Maximal degree in co-relation 113607. Up to 6437 conditions per place. [2022-12-13 11:47:13,664 INFO L137 encePairwiseOnDemand]: 242/256 looper letters, 381 selfloop transitions, 751 changer transitions 1/1133 dead transitions. [2022-12-13 11:47:13,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 1133 transitions, 16684 flow [2022-12-13 11:47:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 11:47:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 11:47:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3092 transitions. [2022-12-13 11:47:13,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41648706896551724 [2022-12-13 11:47:13,670 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3092 transitions. [2022-12-13 11:47:13,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3092 transitions. [2022-12-13 11:47:13,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:13,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3092 transitions. [2022-12-13 11:47:13,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 106.62068965517241) internal successors, (3092), 29 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:13,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 256.0) internal successors, (7680), 30 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:13,682 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 256.0) internal successors, (7680), 30 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:13,682 INFO L175 Difference]: Start difference. First operand has 80 places, 291 transitions, 4305 flow. Second operand 29 states and 3092 transitions. [2022-12-13 11:47:13,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 1133 transitions, 16684 flow [2022-12-13 11:47:14,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 1133 transitions, 15869 flow, removed 190 selfloop flow, removed 6 redundant places. [2022-12-13 11:47:14,655 INFO L231 Difference]: Finished difference. Result has 116 places, 936 transitions, 15884 flow [2022-12-13 11:47:14,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=15884, PETRI_PLACES=116, PETRI_TRANSITIONS=936} [2022-12-13 11:47:14,655 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 80 predicate places. [2022-12-13 11:47:14,655 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 936 transitions, 15884 flow [2022-12-13 11:47:14,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:14,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:14,656 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-12-13 11:47:14,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:47:14,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:14,857 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:47:14,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash 389556751, now seen corresponding path program 2 times [2022-12-13 11:47:14,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:14,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041338869] [2022-12-13 11:47:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:15,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:15,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041338869] [2022-12-13 11:47:15,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041338869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:47:15,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350414543] [2022-12-13 11:47:15,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:47:15,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:15,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:47:15,139 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:47:15,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:47:15,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:47:15,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:47:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:47:15,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:15,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:15,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350414543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:15,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:15,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 11:47:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548716746] [2022-12-13 11:47:15,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:15,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:47:15,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:47:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:47:16,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 256 [2022-12-13 11:47:16,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 936 transitions, 15884 flow. Second operand has 16 states, 16 states have (on average 92.6875) internal successors, (1483), 16 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:16,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:16,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 256 [2022-12-13 11:47:16,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:28,551 INFO L130 PetriNetUnfolder]: 38784/56493 cut-off events. [2022-12-13 11:47:28,551 INFO L131 PetriNetUnfolder]: For 567282/567282 co-relation queries the response was YES. [2022-12-13 11:47:28,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373610 conditions, 56493 events. 38784/56493 cut-off events. For 567282/567282 co-relation queries the response was YES. Maximal size of possible extension queue 2988. Compared 404796 event pairs, 1793 based on Foata normal form. 4346/60839 useless extension candidates. Maximal degree in co-relation 373563. Up to 16413 conditions per place. [2022-12-13 11:47:29,055 INFO L137 encePairwiseOnDemand]: 245/256 looper letters, 1264 selfloop transitions, 2751 changer transitions 0/4015 dead transitions. [2022-12-13 11:47:29,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 4015 transitions, 71459 flow [2022-12-13 11:47:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 11:47:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 11:47:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3084 transitions. [2022-12-13 11:47:29,061 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41540948275862066 [2022-12-13 11:47:29,061 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3084 transitions. [2022-12-13 11:47:29,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3084 transitions. [2022-12-13 11:47:29,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:29,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3084 transitions. [2022-12-13 11:47:29,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 106.34482758620689) internal successors, (3084), 29 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:29,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 256.0) internal successors, (7680), 30 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:29,075 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 256.0) internal successors, (7680), 30 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:29,075 INFO L175 Difference]: Start difference. First operand has 116 places, 936 transitions, 15884 flow. Second operand 29 states and 3084 transitions. [2022-12-13 11:47:29,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 4015 transitions, 71459 flow [2022-12-13 11:47:50,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 4015 transitions, 65130 flow, removed 3164 selfloop flow, removed 2 redundant places. [2022-12-13 11:47:50,609 INFO L231 Difference]: Finished difference. Result has 164 places, 3278 transitions, 62961 flow [2022-12-13 11:47:50,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=12993, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=680, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=62961, PETRI_PLACES=164, PETRI_TRANSITIONS=3278} [2022-12-13 11:47:50,610 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 128 predicate places. [2022-12-13 11:47:50,610 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 3278 transitions, 62961 flow [2022-12-13 11:47:50,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 92.6875) internal successors, (1483), 16 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:50,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:50,611 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:47:50,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:47:50,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:47:50,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:47:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash 389585628, now seen corresponding path program 1 times [2022-12-13 11:47:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:50,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697681366] [2022-12-13 11:47:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:50,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:51,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697681366] [2022-12-13 11:47:51,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697681366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:47:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561029159] [2022-12-13 11:47:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:51,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:47:51,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:47:51,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:47:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:51,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:47:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:51,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:51,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561029159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:51,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:51,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-12-13 11:47:51,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570520579] [2022-12-13 11:47:51,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:51,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:47:51,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:47:51,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:47:51,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 256 [2022-12-13 11:47:51,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 3278 transitions, 62961 flow. Second operand has 12 states, 12 states have (on average 95.25) internal successors, (1143), 12 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:51,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:51,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 256 [2022-12-13 11:47:51,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:48:42,929 INFO L130 PetriNetUnfolder]: 66760/97837 cut-off events. [2022-12-13 11:48:42,929 INFO L131 PetriNetUnfolder]: For 1853401/1853401 co-relation queries the response was YES. [2022-12-13 11:48:43,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747399 conditions, 97837 events. 66760/97837 cut-off events. For 1853401/1853401 co-relation queries the response was YES. Maximal size of possible extension queue 5508. Compared 761841 event pairs, 3679 based on Foata normal form. 8686/106523 useless extension candidates. Maximal degree in co-relation 747329. Up to 22023 conditions per place. [2022-12-13 11:48:44,093 INFO L137 encePairwiseOnDemand]: 245/256 looper letters, 3853 selfloop transitions, 4565 changer transitions 3/8421 dead transitions. [2022-12-13 11:48:44,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 8421 transitions, 176462 flow [2022-12-13 11:48:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 11:48:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 11:48:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2948 transitions. [2022-12-13 11:48:44,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41127232142857145 [2022-12-13 11:48:44,097 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2948 transitions. [2022-12-13 11:48:44,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2948 transitions. [2022-12-13 11:48:44,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:48:44,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2948 transitions. [2022-12-13 11:48:44,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.28571428571429) internal successors, (2948), 28 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:44,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 256.0) internal successors, (7424), 29 states have internal predecessors, (7424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:44,110 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 256.0) internal successors, (7424), 29 states have internal predecessors, (7424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:44,110 INFO L175 Difference]: Start difference. First operand has 164 places, 3278 transitions, 62961 flow. Second operand 28 states and 2948 transitions. [2022-12-13 11:48:44,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 8421 transitions, 176462 flow [2022-12-13 11:51:11,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 8421 transitions, 171425 flow, removed 2502 selfloop flow, removed 4 redundant places. [2022-12-13 11:51:11,669 INFO L231 Difference]: Finished difference. Result has 213 places, 6327 transitions, 138929 flow [2022-12-13 11:51:11,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=58496, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=138929, PETRI_PLACES=213, PETRI_TRANSITIONS=6327} [2022-12-13 11:51:11,671 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 177 predicate places. [2022-12-13 11:51:11,671 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 6327 transitions, 138929 flow [2022-12-13 11:51:11,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 95.25) internal successors, (1143), 12 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:11,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:51:11,672 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:51:11,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 11:51:11,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:51:11,873 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-12-13 11:51:11,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:51:11,874 INFO L85 PathProgramCache]: Analyzing trace with hash 389586551, now seen corresponding path program 2 times [2022-12-13 11:51:11,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:51:11,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212906015] [2022-12-13 11:51:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:51:11,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:51:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:51:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:51:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212906015] [2022-12-13 11:51:12,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212906015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:51:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95398156] [2022-12-13 11:51:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:51:12,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:51:12,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:51:12,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:51:12,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ff92bc-774e-4cd8-bdeb-227f8302d61e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:51:12,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:51:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:51:12,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:51:12,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:51:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:12,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:51:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:13,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95398156] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:51:13,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:51:13,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 11:51:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990764104] [2022-12-13 11:51:13,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:51:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:51:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:51:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:51:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:51:13,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 256 [2022-12-13 11:51:13,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 6327 transitions, 138929 flow. Second operand has 17 states, 17 states have (on average 89.58823529411765) internal successors, (1523), 17 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:13,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:51:13,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 256 [2022-12-13 11:51:13,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:31,831 INFO L130 PetriNetUnfolder]: 118696/173739 cut-off events. [2022-12-13 11:54:31,832 INFO L131 PetriNetUnfolder]: For 3775809/3775809 co-relation queries the response was YES. [2022-12-13 11:54:33,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459956 conditions, 173739 events. 118696/173739 cut-off events. For 3775809/3775809 co-relation queries the response was YES. Maximal size of possible extension queue 8991. Compared 1427730 event pairs, 2961 based on Foata normal form. 6586/180325 useless extension candidates. Maximal degree in co-relation 1459861. Up to 40405 conditions per place. [2022-12-13 11:54:34,691 INFO L137 encePairwiseOnDemand]: 244/256 looper letters, 4328 selfloop transitions, 9907 changer transitions 0/14235 dead transitions. [2022-12-13 11:54:34,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 14235 transitions, 333982 flow [2022-12-13 11:54:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 11:54:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-13 11:54:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4629 transitions. [2022-12-13 11:54:34,697 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39308763586956524 [2022-12-13 11:54:34,697 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4629 transitions. [2022-12-13 11:54:34,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4629 transitions. [2022-12-13 11:54:34,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:34,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4629 transitions. [2022-12-13 11:54:34,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 100.6304347826087) internal successors, (4629), 46 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:34,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 256.0) internal successors, (12032), 47 states have internal predecessors, (12032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:34,711 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 256.0) internal successors, (12032), 47 states have internal predecessors, (12032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:34,711 INFO L175 Difference]: Start difference. First operand has 213 places, 6327 transitions, 138929 flow. Second operand 46 states and 4629 transitions. [2022-12-13 11:54:34,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 14235 transitions, 333982 flow