./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.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_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/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_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/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_88c117d6-4b6f-4a98-a5b1-a589870cb669/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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- 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 18:56:31,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:56:31,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:56:31,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:56:31,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:56:31,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:56:31,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:56:31,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:56:31,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:56:31,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:56:31,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:56:31,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:56:31,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:56:31,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:56:31,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:56:31,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:56:31,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:56:31,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:56:31,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:56:31,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:56:31,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:56:31,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:56:31,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:56:31,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:56:31,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:56:31,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:56:31,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:56:31,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:56:31,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:56:31,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:56:31,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:56:31,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:56:31,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:56:31,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:56:31,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:56:31,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:56:31,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:56:31,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:56:31,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:56:31,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:56:31,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:56:31,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 18:56:31,553 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:56:31,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:56:31,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:56:31,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:56:31,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:56:31,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:56:31,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:56:31,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:56:31,555 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:56:31,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:56:31,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:56:31,556 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:56:31,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:56:31,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:56:31,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:56:31,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:56:31,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:56:31,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:56:31,562 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 18:56:31,562 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:56:31,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:56:31,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:56:31,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:56:31,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:56:31,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:56:31,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:56:31,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:56:31,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:56:31,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:56:31,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:56:31,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:56:31,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:56:31,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:56:31,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:56:31,565 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:56:31,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:56:31,566 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:56:31,566 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_88c117d6-4b6f-4a98-a5b1-a589870cb669/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-12-13 18:56:31,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:56:31,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:56:31,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:56:31,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:56:31,768 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:56:31,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-12-13 18:56:34,357 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:56:34,529 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:56:34,530 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-12-13 18:56:34,536 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/data/6ee7f233b/b014f50aa01149d2816a170ac28d8ef6/FLAG70af4507c [2022-12-13 18:56:34,907 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/data/6ee7f233b/b014f50aa01149d2816a170ac28d8ef6 [2022-12-13 18:56:34,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:56:34,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:56:34,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:56:34,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:56:34,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:56:34,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:56:34" (1/1) ... [2022-12-13 18:56:34,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a98af61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:34, skipping insertion in model container [2022-12-13 18:56:34,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:56:34" (1/1) ... [2022-12-13 18:56:34,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:56:34,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:56:35,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:56:35,039 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:56:35,043 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:56:35,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:56:35,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:56:35,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:56:35,049 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_88c117d6-4b6f-4a98-a5b1-a589870cb669/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-12-13 18:56:35,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:56:35,060 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:56:35,069 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:56:35,070 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:56:35,071 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:56:35,072 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:56:35,072 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:56:35,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:56:35,076 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_88c117d6-4b6f-4a98-a5b1-a589870cb669/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-12-13 18:56:35,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:56:35,088 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:56:35,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35 WrapperNode [2022-12-13 18:56:35,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:56:35,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:56:35,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:56:35,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:56:35,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,116 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 152 [2022-12-13 18:56:35,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:56:35,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:56:35,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:56:35,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:56:35,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,134 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:56:35,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:56:35,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:56:35,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:56:35,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (1/1) ... [2022-12-13 18:56:35,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:56:35,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:35,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:56:35,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:56:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:56:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 18:56:35,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 18:56:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 18:56:35,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 18:56:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:56:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:56:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:56:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:56:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:56:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:56:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:56:35,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:56:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:56:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:56:35,197 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 18:56:35,270 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:56:35,272 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:56:35,490 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:56:35,580 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:56:35,580 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 18:56:35,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:56:35 BoogieIcfgContainer [2022-12-13 18:56:35,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:56:35,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:56:35,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:56:35,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:56:35,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:56:34" (1/3) ... [2022-12-13 18:56:35,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650540c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:56:35, skipping insertion in model container [2022-12-13 18:56:35,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:35" (2/3) ... [2022-12-13 18:56:35,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650540c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:56:35, skipping insertion in model container [2022-12-13 18:56:35,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:56:35" (3/3) ... [2022-12-13 18:56:35,592 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-12-13 18:56:35,599 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 18:56:35,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:56:35,608 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 18:56:35,609 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:56:35,673 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 18:56:35,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2022-12-13 18:56:35,768 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2022-12-13 18:56:35,768 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:56:35,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-12-13 18:56:35,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2022-12-13 18:56:35,779 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 123 transitions, 255 flow [2022-12-13 18:56:35,790 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:56:35,798 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 123 transitions, 255 flow [2022-12-13 18:56:35,800 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 123 transitions, 255 flow [2022-12-13 18:56:35,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 123 transitions, 255 flow [2022-12-13 18:56:35,831 INFO L130 PetriNetUnfolder]: 10/123 cut-off events. [2022-12-13 18:56:35,831 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:56:35,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 123 events. 10/123 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 124 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-12-13 18:56:35,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2022-12-13 18:56:40,136 INFO L134 LiptonReduction]: Checked pairs total: 1204 [2022-12-13 18:56:40,136 INFO L136 LiptonReduction]: Total number of compositions: 136 [2022-12-13 18:56:40,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:56:40,154 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;@36dbdb0a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:56:40,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-13 18:56:40,156 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 18:56:40,156 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:56:40,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:40,157 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:56:40,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash 20865, now seen corresponding path program 1 times [2022-12-13 18:56:40,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:40,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195506869] [2022-12-13 18:56:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:40,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:40,373 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 18:56:40,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:40,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195506869] [2022-12-13 18:56:40,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195506869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:40,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:40,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:56:40,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813531404] [2022-12-13 18:56:40,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:40,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:56:40,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:56:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:56:40,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 280 [2022-12-13 18:56:40,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:40,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:40,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 280 [2022-12-13 18:56:40,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:40,541 INFO L130 PetriNetUnfolder]: 215/361 cut-off events. [2022-12-13 18:56:40,541 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 18:56:40,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 361 events. 215/361 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 1510 event pairs, 126 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 305. Up to 178 conditions per place. [2022-12-13 18:56:40,545 INFO L137 encePairwiseOnDemand]: 273/280 looper letters, 35 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-12-13 18:56:40,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 38 transitions, 168 flow [2022-12-13 18:56:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:56:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:56:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2022-12-13 18:56:40,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.475 [2022-12-13 18:56:40,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2022-12-13 18:56:40,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2022-12-13 18:56:40,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:40,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2022-12-13 18:56:40,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 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 18:56:40,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:40,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:40,571 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 57 flow. Second operand 3 states and 399 transitions. [2022-12-13 18:56:40,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 38 transitions, 168 flow [2022-12-13 18:56:40,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:56:40,575 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 60 flow [2022-12-13 18:56:40,577 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2022-12-13 18:56:40,580 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2022-12-13 18:56:40,580 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 60 flow [2022-12-13 18:56:40,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:40,581 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:40,581 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:56:40,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:56:40,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:40,582 INFO L85 PathProgramCache]: Analyzing trace with hash 648026, now seen corresponding path program 1 times [2022-12-13 18:56:40,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:40,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020717530] [2022-12-13 18:56:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:40,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:40,646 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 18:56:40,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:40,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020717530] [2022-12-13 18:56:40,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020717530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:40,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:40,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:56:40,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791821791] [2022-12-13 18:56:40,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:40,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:56:40,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:40,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:56:40,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:56:40,660 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 280 [2022-12-13 18:56:40,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:40,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:40,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 280 [2022-12-13 18:56:40,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:40,731 INFO L130 PetriNetUnfolder]: 215/360 cut-off events. [2022-12-13 18:56:40,731 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:56:40,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 360 events. 215/360 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 1510 event pairs, 126 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 368. Up to 350 conditions per place. [2022-12-13 18:56:40,734 INFO L137 encePairwiseOnDemand]: 278/280 looper letters, 19 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2022-12-13 18:56:40,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 96 flow [2022-12-13 18:56:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:56:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:56:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2022-12-13 18:56:40,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2022-12-13 18:56:40,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2022-12-13 18:56:40,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2022-12-13 18:56:40,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:40,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2022-12-13 18:56:40,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 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 18:56:40,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:40,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:40,742 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 60 flow. Second operand 3 states and 374 transitions. [2022-12-13 18:56:40,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 96 flow [2022-12-13 18:56:40,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:40,743 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 56 flow [2022-12-13 18:56:40,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2022-12-13 18:56:40,744 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2022-12-13 18:56:40,744 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 56 flow [2022-12-13 18:56:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:40,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:40,745 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:56:40,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:56:40,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:40,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash 648024, now seen corresponding path program 1 times [2022-12-13 18:56:40,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:40,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811066869] [2022-12-13 18:56:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:40,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:40,818 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 18:56:40,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811066869] [2022-12-13 18:56:40,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811066869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179917754] [2022-12-13 18:56:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:40,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:40,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:40,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:40,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:56:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:40,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:56:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:40,910 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 18:56:40,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:40,924 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 18:56:40,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179917754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:40,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:56:40,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 18:56:40,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235885256] [2022-12-13 18:56:40,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:40,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:56:40,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:40,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:56:40,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:56:40,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 280 [2022-12-13 18:56:40,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 56 flow. Second operand has 7 states, 7 states have (on average 119.14285714285714) internal successors, (834), 7 states have internal predecessors, (834), 0 states have call successors, (0), 0 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 18:56:40,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:40,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 280 [2022-12-13 18:56:40,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:41,215 INFO L130 PetriNetUnfolder]: 536/897 cut-off events. [2022-12-13 18:56:41,215 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 18:56:41,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1836 conditions, 897 events. 536/897 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4387 event pairs, 315 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 1828. Up to 177 conditions per place. [2022-12-13 18:56:41,220 INFO L137 encePairwiseOnDemand]: 277/280 looper letters, 82 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2022-12-13 18:56:41,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 88 transitions, 386 flow [2022-12-13 18:56:41,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:56:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:56:41,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 798 transitions. [2022-12-13 18:56:41,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.475 [2022-12-13 18:56:41,224 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 798 transitions. [2022-12-13 18:56:41,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 798 transitions. [2022-12-13 18:56:41,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:41,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 798 transitions. [2022-12-13 18:56:41,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 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 18:56:41,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 280.0) internal successors, (1960), 7 states have internal predecessors, (1960), 0 states have call successors, (0), 0 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 18:56:41,238 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 280.0) internal successors, (1960), 7 states have internal predecessors, (1960), 0 states have call successors, (0), 0 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 18:56:41,238 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 56 flow. Second operand 6 states and 798 transitions. [2022-12-13 18:56:41,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 88 transitions, 386 flow [2022-12-13 18:56:41,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 88 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:41,240 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 91 flow [2022-12-13 18:56:41,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2022-12-13 18:56:41,241 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2022-12-13 18:56:41,241 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 91 flow [2022-12-13 18:56:41,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.14285714285714) internal successors, (834), 7 states have internal predecessors, (834), 0 states have call successors, (0), 0 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 18:56:41,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:41,242 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:56:41,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:56:41,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:41,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 20091794, now seen corresponding path program 1 times [2022-12-13 18:56:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:41,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679580860] [2022-12-13 18:56:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:41,547 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 18:56:41,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:41,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679580860] [2022-12-13 18:56:41,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679580860] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:41,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:41,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:56:41,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315874451] [2022-12-13 18:56:41,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:41,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:56:41,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:41,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:56:41,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:56:41,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 280 [2022-12-13 18:56:41,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 18:56:41,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:41,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 280 [2022-12-13 18:56:41,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:41,709 INFO L130 PetriNetUnfolder]: 476/877 cut-off events. [2022-12-13 18:56:41,709 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 18:56:41,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1796 conditions, 877 events. 476/877 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4841 event pairs, 195 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 1784. Up to 611 conditions per place. [2022-12-13 18:56:41,714 INFO L137 encePairwiseOnDemand]: 274/280 looper letters, 28 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2022-12-13 18:56:41,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 170 flow [2022-12-13 18:56:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:56:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:56:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2022-12-13 18:56:41,716 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2022-12-13 18:56:41,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2022-12-13 18:56:41,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2022-12-13 18:56:41,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:41,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2022-12-13 18:56:41,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 18:56:41,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:41,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:41,721 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 91 flow. Second operand 3 states and 376 transitions. [2022-12-13 18:56:41,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 170 flow [2022-12-13 18:56:41,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 162 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:41,723 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 101 flow [2022-12-13 18:56:41,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2022-12-13 18:56:41,724 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2022-12-13 18:56:41,724 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 101 flow [2022-12-13 18:56:41,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 18:56:41,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:41,725 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 18:56:41,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:56:41,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:41,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2126675903, now seen corresponding path program 2 times [2022-12-13 18:56:41,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:41,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322407240] [2022-12-13 18:56:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:41,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:41,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:41,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322407240] [2022-12-13 18:56:41,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322407240] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:41,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869034917] [2022-12-13 18:56:41,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:56:41,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:41,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:41,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:41,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:56:41,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:56:41,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:56:41,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:56:41,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:56:41,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:56:41,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869034917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:41,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:56:41,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 18:56:41,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468010238] [2022-12-13 18:56:41,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:41,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:56:41,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:56:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:56:41,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 280 [2022-12-13 18:56:41,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 18:56:41,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:41,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 280 [2022-12-13 18:56:41,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:41,999 INFO L130 PetriNetUnfolder]: 476/876 cut-off events. [2022-12-13 18:56:41,999 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2022-12-13 18:56:42,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2069 conditions, 876 events. 476/876 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4858 event pairs, 375 based on Foata normal form. 1/577 useless extension candidates. Maximal degree in co-relation 2055. Up to 866 conditions per place. [2022-12-13 18:56:42,003 INFO L137 encePairwiseOnDemand]: 278/280 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2022-12-13 18:56:42,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 24 transitions, 137 flow [2022-12-13 18:56:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:56:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:56:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2022-12-13 18:56:42,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2022-12-13 18:56:42,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2022-12-13 18:56:42,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2022-12-13 18:56:42,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:42,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2022-12-13 18:56:42,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 18:56:42,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:42,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:42,009 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 101 flow. Second operand 3 states and 376 transitions. [2022-12-13 18:56:42,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 24 transitions, 137 flow [2022-12-13 18:56:42,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 125 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 18:56:42,011 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 81 flow [2022-12-13 18:56:42,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2022-12-13 18:56:42,012 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2022-12-13 18:56:42,012 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 81 flow [2022-12-13 18:56:42,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 18:56:42,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:42,013 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:42,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:56:42,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:42,213 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:42,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1555317177, now seen corresponding path program 1 times [2022-12-13 18:56:42,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:42,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857555524] [2022-12-13 18:56:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:42,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:42,287 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 18:56:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857555524] [2022-12-13 18:56:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857555524] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:42,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:42,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:56:42,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54520254] [2022-12-13 18:56:42,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:56:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:56:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:56:42,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 280 [2022-12-13 18:56:42,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 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 18:56:42,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:42,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 280 [2022-12-13 18:56:42,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:42,444 INFO L130 PetriNetUnfolder]: 390/730 cut-off events. [2022-12-13 18:56:42,445 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2022-12-13 18:56:42,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 730 events. 390/730 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 3909 event pairs, 309 based on Foata normal form. 6/496 useless extension candidates. Maximal degree in co-relation 1678. Up to 694 conditions per place. [2022-12-13 18:56:42,447 INFO L137 encePairwiseOnDemand]: 274/280 looper letters, 21 selfloop transitions, 2 changer transitions 9/33 dead transitions. [2022-12-13 18:56:42,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 167 flow [2022-12-13 18:56:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:56:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:56:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2022-12-13 18:56:42,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43839285714285714 [2022-12-13 18:56:42,449 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2022-12-13 18:56:42,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2022-12-13 18:56:42,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:42,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2022-12-13 18:56:42,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 18:56:42,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 18:56:42,452 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 18:56:42,452 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 81 flow. Second operand 4 states and 491 transitions. [2022-12-13 18:56:42,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 167 flow [2022-12-13 18:56:42,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:42,453 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 94 flow [2022-12-13 18:56:42,453 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2022-12-13 18:56:42,454 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2022-12-13 18:56:42,454 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 94 flow [2022-12-13 18:56:42,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 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 18:56:42,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:42,454 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:42,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:56:42,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:42,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash -615977087, now seen corresponding path program 1 times [2022-12-13 18:56:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:42,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761586898] [2022-12-13 18:56:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:42,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:42,533 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 18:56:42,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:42,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761586898] [2022-12-13 18:56:42,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761586898] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:42,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228285612] [2022-12-13 18:56:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:42,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:42,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:42,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:42,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:56:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:42,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:56:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:56:42,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:56:42,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228285612] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:42,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:56:42,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 18:56:42,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739534000] [2022-12-13 18:56:42,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:42,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:56:42,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:56:42,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:56:42,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 280 [2022-12-13 18:56:42,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 94 flow. Second operand has 3 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 18:56:42,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:42,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 280 [2022-12-13 18:56:42,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:42,686 INFO L130 PetriNetUnfolder]: 173/334 cut-off events. [2022-12-13 18:56:42,686 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-12-13 18:56:42,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 839 conditions, 334 events. 173/334 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1450 event pairs, 116 based on Foata normal form. 64/366 useless extension candidates. Maximal degree in co-relation 825. Up to 326 conditions per place. [2022-12-13 18:56:42,687 INFO L137 encePairwiseOnDemand]: 276/280 looper letters, 16 selfloop transitions, 1 changer transitions 3/21 dead transitions. [2022-12-13 18:56:42,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 122 flow [2022-12-13 18:56:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:56:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:56:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2022-12-13 18:56:42,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2022-12-13 18:56:42,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2022-12-13 18:56:42,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2022-12-13 18:56:42,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:42,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2022-12-13 18:56:42,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 18:56:42,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:42,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 18:56:42,692 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 94 flow. Second operand 3 states and 375 transitions. [2022-12-13 18:56:42,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 122 flow [2022-12-13 18:56:42,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 21 transitions, 114 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 18:56:42,693 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 69 flow [2022-12-13 18:56:42,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2022-12-13 18:56:42,694 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2022-12-13 18:56:42,694 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 69 flow [2022-12-13 18:56:42,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 18:56:42,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:42,695 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:42,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:56:42,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:42,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1915419881, now seen corresponding path program 1 times [2022-12-13 18:56:42,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:42,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291933060] [2022-12-13 18:56:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:42,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:43,338 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 18:56:43,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291933060] [2022-12-13 18:56:43,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291933060] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372148087] [2022-12-13 18:56:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:43,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:43,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:43,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:43,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:56:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:43,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 18:56:43,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:43,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:56:43,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:56:43,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 18:56:43,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:56:43,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 18:56:43,746 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 18:56:43,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:45,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:56:45,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-12-13 18:56:45,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:56:45,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 171 [2022-12-13 18:56:45,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 142 [2022-12-13 18:56:45,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 118 [2022-12-13 18:56:46,082 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 18:56:46,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372148087] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:46,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:56:46,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 18:56:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295252315] [2022-12-13 18:56:46,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:46,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:56:46,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:46,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:56:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=219, Unknown=1, NotChecked=0, Total=272 [2022-12-13 18:56:46,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 280 [2022-12-13 18:56:46,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 69 flow. Second operand has 17 states, 17 states have (on average 84.41176470588235) internal successors, (1435), 17 states have internal predecessors, (1435), 0 states have call successors, (0), 0 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 18:56:46,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:46,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 280 [2022-12-13 18:56:46,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:47,598 INFO L130 PetriNetUnfolder]: 107/204 cut-off events. [2022-12-13 18:56:47,598 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 18:56:47,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 204 events. 107/204 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 679 event pairs, 22 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 525. Up to 112 conditions per place. [2022-12-13 18:56:47,599 INFO L137 encePairwiseOnDemand]: 272/280 looper letters, 27 selfloop transitions, 12 changer transitions 2/42 dead transitions. [2022-12-13 18:56:47,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 225 flow [2022-12-13 18:56:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:56:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 18:56:47,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 871 transitions. [2022-12-13 18:56:47,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31107142857142855 [2022-12-13 18:56:47,602 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 871 transitions. [2022-12-13 18:56:47,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 871 transitions. [2022-12-13 18:56:47,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:47,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 871 transitions. [2022-12-13 18:56:47,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.1) internal successors, (871), 10 states have internal predecessors, (871), 0 states have call successors, (0), 0 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 18:56:47,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 18:56:47,606 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 18:56:47,606 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 69 flow. Second operand 10 states and 871 transitions. [2022-12-13 18:56:47,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 225 flow [2022-12-13 18:56:47,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 42 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:47,607 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 148 flow [2022-12-13 18:56:47,608 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=148, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2022-12-13 18:56:47,608 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2022-12-13 18:56:47,608 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 148 flow [2022-12-13 18:56:47,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 84.41176470588235) internal successors, (1435), 17 states have internal predecessors, (1435), 0 states have call successors, (0), 0 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 18:56:47,609 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:47,609 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:47,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:56:47,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:47,809 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:47,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:47,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1915419880, now seen corresponding path program 1 times [2022-12-13 18:56:47,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778356128] [2022-12-13 18:56:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:47,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:48,090 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 18:56:48,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:48,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778356128] [2022-12-13 18:56:48,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778356128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:48,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791824121] [2022-12-13 18:56:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:48,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:48,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:48,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:48,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:56:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:48,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 18:56:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:48,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:56:48,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:56:48,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:56:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:56:48,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:56:48,386 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 18:56:48,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:48,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:56:48,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-12-13 18:56:48,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:56:48,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 161 [2022-12-13 18:56:48,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 122 [2022-12-13 18:56:48,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2022-12-13 18:56:48,626 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 18:56:48,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791824121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:48,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:56:48,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2022-12-13 18:56:48,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50558632] [2022-12-13 18:56:48,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:48,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 18:56:48,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 18:56:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2022-12-13 18:56:50,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:56:53,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:56:53,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 280 [2022-12-13 18:56:53,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 148 flow. Second operand has 16 states, 16 states have (on average 84.5) internal successors, (1352), 16 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 18:56:53,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:53,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 280 [2022-12-13 18:56:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:54,029 INFO L130 PetriNetUnfolder]: 133/250 cut-off events. [2022-12-13 18:56:54,029 INFO L131 PetriNetUnfolder]: For 254/254 co-relation queries the response was YES. [2022-12-13 18:56:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 250 events. 133/250 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 918 event pairs, 18 based on Foata normal form. 16/266 useless extension candidates. Maximal degree in co-relation 799. Up to 129 conditions per place. [2022-12-13 18:56:54,031 INFO L137 encePairwiseOnDemand]: 272/280 looper letters, 34 selfloop transitions, 18 changer transitions 2/55 dead transitions. [2022-12-13 18:56:54,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 360 flow [2022-12-13 18:56:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:56:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 18:56:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1135 transitions. [2022-12-13 18:56:54,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3118131868131868 [2022-12-13 18:56:54,037 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1135 transitions. [2022-12-13 18:56:54,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1135 transitions. [2022-12-13 18:56:54,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:54,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1135 transitions. [2022-12-13 18:56:54,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 87.3076923076923) internal successors, (1135), 13 states have internal predecessors, (1135), 0 states have call successors, (0), 0 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 18:56:54,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 280.0) internal successors, (3920), 14 states have internal predecessors, (3920), 0 states have call successors, (0), 0 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 18:56:54,050 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 280.0) internal successors, (3920), 14 states have internal predecessors, (3920), 0 states have call successors, (0), 0 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 18:56:54,050 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 148 flow. Second operand 13 states and 1135 transitions. [2022-12-13 18:56:54,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 360 flow [2022-12-13 18:56:54,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 331 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-12-13 18:56:54,053 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 214 flow [2022-12-13 18:56:54,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=214, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2022-12-13 18:56:54,054 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2022-12-13 18:56:54,054 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 214 flow [2022-12-13 18:56:54,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 84.5) internal successors, (1352), 16 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 18:56:54,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:54,055 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:54,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:56:54,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 18:56:54,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash 751526528, now seen corresponding path program 1 times [2022-12-13 18:56:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:54,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031333770] [2022-12-13 18:56:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:54,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:54,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:54,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031333770] [2022-12-13 18:56:54,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031333770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:54,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417172343] [2022-12-13 18:56:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:54,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:54,478 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:54,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:56:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:56:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:54,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:54,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417172343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:54,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:56:54,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 18:56:54,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072147894] [2022-12-13 18:56:54,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:54,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:56:54,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:56:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:56:54,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 280 [2022-12-13 18:56:54,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 214 flow. Second operand has 17 states, 17 states have (on average 110.58823529411765) internal successors, (1880), 17 states have internal predecessors, (1880), 0 states have call successors, (0), 0 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 18:56:54,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:54,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 280 [2022-12-13 18:56:54,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:55,062 INFO L130 PetriNetUnfolder]: 93/194 cut-off events. [2022-12-13 18:56:55,062 INFO L131 PetriNetUnfolder]: For 509/509 co-relation queries the response was YES. [2022-12-13 18:56:55,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 194 events. 93/194 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 694 event pairs, 38 based on Foata normal form. 44/238 useless extension candidates. Maximal degree in co-relation 692. Up to 135 conditions per place. [2022-12-13 18:56:55,064 INFO L137 encePairwiseOnDemand]: 273/280 looper letters, 18 selfloop transitions, 3 changer transitions 20/42 dead transitions. [2022-12-13 18:56:55,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 42 transitions, 307 flow [2022-12-13 18:56:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:56:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:56:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 909 transitions. [2022-12-13 18:56:55,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40580357142857143 [2022-12-13 18:56:55,067 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 909 transitions. [2022-12-13 18:56:55,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 909 transitions. [2022-12-13 18:56:55,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:55,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 909 transitions. [2022-12-13 18:56:55,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.625) internal successors, (909), 8 states have internal predecessors, (909), 0 states have call successors, (0), 0 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 18:56:55,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 18:56:55,074 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 18:56:55,074 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 214 flow. Second operand 8 states and 909 transitions. [2022-12-13 18:56:55,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 42 transitions, 307 flow [2022-12-13 18:56:55,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 279 flow, removed 4 selfloop flow, removed 8 redundant places. [2022-12-13 18:56:55,077 INFO L231 Difference]: Finished difference. Result has 49 places, 22 transitions, 134 flow [2022-12-13 18:56:55,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=134, PETRI_PLACES=49, PETRI_TRANSITIONS=22} [2022-12-13 18:56:55,078 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2022-12-13 18:56:55,078 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 22 transitions, 134 flow [2022-12-13 18:56:55,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 110.58823529411765) internal successors, (1880), 17 states have internal predecessors, (1880), 0 states have call successors, (0), 0 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 18:56:55,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:55,079 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:55,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 18:56:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 18:56:55,280 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:55,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:55,280 INFO L85 PathProgramCache]: Analyzing trace with hash 299893751, now seen corresponding path program 2 times [2022-12-13 18:56:55,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:55,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812667290] [2022-12-13 18:56:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:56,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:56,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812667290] [2022-12-13 18:56:56,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812667290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:56,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756269311] [2022-12-13 18:56:56,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:56:56,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:56,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:56,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:56,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:56:56,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:56:56,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:56:56,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:56:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:56:56,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:56:56,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756269311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:56,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:56:56,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-12-13 18:56:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018472321] [2022-12-13 18:56:56,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:56,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:56:56,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:56,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:56:56,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:56:56,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 280 [2022-12-13 18:56:56,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 22 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 18:56:56,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:56,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 280 [2022-12-13 18:56:56,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:56,727 INFO L130 PetriNetUnfolder]: 94/179 cut-off events. [2022-12-13 18:56:56,727 INFO L131 PetriNetUnfolder]: For 463/463 co-relation queries the response was YES. [2022-12-13 18:56:56,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 179 events. 94/179 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 545 event pairs, 7 based on Foata normal form. 8/187 useless extension candidates. Maximal degree in co-relation 777. Up to 103 conditions per place. [2022-12-13 18:56:56,729 INFO L137 encePairwiseOnDemand]: 276/280 looper letters, 22 selfloop transitions, 5 changer transitions 1/29 dead transitions. [2022-12-13 18:56:56,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 29 transitions, 233 flow [2022-12-13 18:56:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:56:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:56:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2022-12-13 18:56:56,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41875 [2022-12-13 18:56:56,731 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2022-12-13 18:56:56,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2022-12-13 18:56:56,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:56,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2022-12-13 18:56:56,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 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 18:56:56,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 18:56:56,734 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 18:56:56,734 INFO L175 Difference]: Start difference. First operand has 49 places, 22 transitions, 134 flow. Second operand 4 states and 469 transitions. [2022-12-13 18:56:56,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 29 transitions, 233 flow [2022-12-13 18:56:56,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 191 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-12-13 18:56:56,738 INFO L231 Difference]: Finished difference. Result has 36 places, 23 transitions, 134 flow [2022-12-13 18:56:56,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=36, PETRI_TRANSITIONS=23} [2022-12-13 18:56:56,739 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2022-12-13 18:56:56,739 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 23 transitions, 134 flow [2022-12-13 18:56:56,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 18:56:56,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:56,739 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:56,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:56:56,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:56,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:56,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2068444327, now seen corresponding path program 2 times [2022-12-13 18:56:56,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:56,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457138463] [2022-12-13 18:56:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:56,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:56:57,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:57,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457138463] [2022-12-13 18:56:57,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457138463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:57,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411763480] [2022-12-13 18:56:57,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:56:57,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:57,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:57,034 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:57,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:56:57,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:56:57,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:56:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:56:57,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:57,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 92 [2022-12-13 18:56:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:56:57,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:56:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411763480] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:57,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:56:57,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 18:56:57,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184130894] [2022-12-13 18:56:57,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:57,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:56:57,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:57,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:56:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:56:57,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 280 [2022-12-13 18:56:57,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 23 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 18:56:57,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:57,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 280 [2022-12-13 18:56:57,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:57,286 INFO L130 PetriNetUnfolder]: 184/337 cut-off events. [2022-12-13 18:56:57,286 INFO L131 PetriNetUnfolder]: For 830/830 co-relation queries the response was YES. [2022-12-13 18:56:57,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 337 events. 184/337 cut-off events. For 830/830 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1304 event pairs, 43 based on Foata normal form. 36/373 useless extension candidates. Maximal degree in co-relation 1171. Up to 181 conditions per place. [2022-12-13 18:56:57,289 INFO L137 encePairwiseOnDemand]: 275/280 looper letters, 24 selfloop transitions, 8 changer transitions 1/34 dead transitions. [2022-12-13 18:56:57,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 266 flow [2022-12-13 18:56:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:56:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:56:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 492 transitions. [2022-12-13 18:56:57,291 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2022-12-13 18:56:57,291 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 492 transitions. [2022-12-13 18:56:57,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 492 transitions. [2022-12-13 18:56:57,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:57,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 492 transitions. [2022-12-13 18:56:57,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 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 18:56:57,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 18:56:57,296 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 18:56:57,297 INFO L175 Difference]: Start difference. First operand has 36 places, 23 transitions, 134 flow. Second operand 4 states and 492 transitions. [2022-12-13 18:56:57,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 266 flow [2022-12-13 18:56:57,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:56:57,299 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 211 flow [2022-12-13 18:56:57,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=211, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2022-12-13 18:56:57,300 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 11 predicate places. [2022-12-13 18:56:57,300 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 211 flow [2022-12-13 18:56:57,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 18:56:57,300 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:57,300 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:57,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:56:57,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:57,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash 299893752, now seen corresponding path program 2 times [2022-12-13 18:56:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:57,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470007715] [2022-12-13 18:56:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:57,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:58,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:58,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470007715] [2022-12-13 18:56:58,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470007715] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:58,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562448106] [2022-12-13 18:56:58,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:56:58,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:58,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:58,666 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:58,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:56:58,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:56:58,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:56:58,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:56:58,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:56:58,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:56:58,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562448106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:58,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:56:58,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-12-13 18:56:58,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866700992] [2022-12-13 18:56:58,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:58,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:56:58,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:56:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:56:58,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 280 [2022-12-13 18:56:58,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 18:56:58,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:58,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 280 [2022-12-13 18:56:58,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:58,933 INFO L130 PetriNetUnfolder]: 160/297 cut-off events. [2022-12-13 18:56:58,933 INFO L131 PetriNetUnfolder]: For 879/879 co-relation queries the response was YES. [2022-12-13 18:56:58,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275 conditions, 297 events. 160/297 cut-off events. For 879/879 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1078 event pairs, 15 based on Foata normal form. 16/313 useless extension candidates. Maximal degree in co-relation 1255. Up to 223 conditions per place. [2022-12-13 18:56:58,935 INFO L137 encePairwiseOnDemand]: 276/280 looper letters, 25 selfloop transitions, 7 changer transitions 1/34 dead transitions. [2022-12-13 18:56:58,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 298 flow [2022-12-13 18:56:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:56:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:56:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2022-12-13 18:56:58,936 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2022-12-13 18:56:58,936 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2022-12-13 18:56:58,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2022-12-13 18:56:58,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:58,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2022-12-13 18:56:58,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 18:56:58,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 18:56:58,938 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 18:56:58,938 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 211 flow. Second operand 4 states and 468 transitions. [2022-12-13 18:56:58,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 298 flow [2022-12-13 18:56:58,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 290 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 18:56:58,940 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 225 flow [2022-12-13 18:56:58,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2022-12-13 18:56:58,941 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 15 predicate places. [2022-12-13 18:56:58,941 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 225 flow [2022-12-13 18:56:58,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 18:56:58,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:58,941 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:58,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 18:56:59,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 18:56:59,142 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:56:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash 302776329, now seen corresponding path program 3 times [2022-12-13 18:56:59,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:59,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432053988] [2022-12-13 18:56:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:59,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:59,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:59,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432053988] [2022-12-13 18:56:59,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432053988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:59,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993027442] [2022-12-13 18:56:59,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:56:59,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:59,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:59,666 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:59,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:56:59,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:56:59,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:56:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:56:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:57:00,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:00,314 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 18:57:00,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 209 treesize of output 187 [2022-12-13 18:57:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:57:00,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993027442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:00,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:00,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 17 [2022-12-13 18:57:00,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829700983] [2022-12-13 18:57:00,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:00,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 18:57:00,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:00,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 18:57:00,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:57:01,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 280 [2022-12-13 18:57:01,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 225 flow. Second operand has 19 states, 19 states have (on average 101.84210526315789) internal successors, (1935), 19 states have internal predecessors, (1935), 0 states have call successors, (0), 0 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 18:57:01,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:01,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 280 [2022-12-13 18:57:01,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:02,154 INFO L130 PetriNetUnfolder]: 343/603 cut-off events. [2022-12-13 18:57:02,154 INFO L131 PetriNetUnfolder]: For 1879/1879 co-relation queries the response was YES. [2022-12-13 18:57:02,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2715 conditions, 603 events. 343/603 cut-off events. For 1879/1879 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2588 event pairs, 16 based on Foata normal form. 24/627 useless extension candidates. Maximal degree in co-relation 2692. Up to 337 conditions per place. [2022-12-13 18:57:02,157 INFO L137 encePairwiseOnDemand]: 272/280 looper letters, 55 selfloop transitions, 25 changer transitions 5/85 dead transitions. [2022-12-13 18:57:02,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 699 flow [2022-12-13 18:57:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 18:57:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 18:57:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2083 transitions. [2022-12-13 18:57:02,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3719642857142857 [2022-12-13 18:57:02,161 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2083 transitions. [2022-12-13 18:57:02,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2083 transitions. [2022-12-13 18:57:02,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:02,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2083 transitions. [2022-12-13 18:57:02,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 104.15) internal successors, (2083), 20 states have internal predecessors, (2083), 0 states have call successors, (0), 0 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 18:57:02,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 280.0) internal successors, (5880), 21 states have internal predecessors, (5880), 0 states have call successors, (0), 0 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 18:57:02,168 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 280.0) internal successors, (5880), 21 states have internal predecessors, (5880), 0 states have call successors, (0), 0 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 18:57:02,168 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 225 flow. Second operand 20 states and 2083 transitions. [2022-12-13 18:57:02,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 699 flow [2022-12-13 18:57:02,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 685 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:57:02,171 INFO L231 Difference]: Finished difference. Result has 67 places, 43 transitions, 461 flow [2022-12-13 18:57:02,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=461, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2022-12-13 18:57:02,172 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2022-12-13 18:57:02,172 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 461 flow [2022-12-13 18:57:02,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 101.84210526315789) internal successors, (1935), 19 states have internal predecessors, (1935), 0 states have call successors, (0), 0 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 18:57:02,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:02,173 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:02,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 18:57:02,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:02,374 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:57:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:02,375 INFO L85 PathProgramCache]: Analyzing trace with hash 302776328, now seen corresponding path program 1 times [2022-12-13 18:57:02,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:02,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121051298] [2022-12-13 18:57:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:02,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:03,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:03,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121051298] [2022-12-13 18:57:03,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121051298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:03,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905638926] [2022-12-13 18:57:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:03,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:03,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:03,325 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:03,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:57:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 18:57:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:03,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:03,902 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 18:57:03,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 209 treesize of output 196 [2022-12-13 18:57:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:04,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905638926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:04,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:04,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2022-12-13 18:57:04,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999146512] [2022-12-13 18:57:04,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:04,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 18:57:04,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:04,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 18:57:04,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-12-13 18:57:05,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 280 [2022-12-13 18:57:05,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 461 flow. Second operand has 26 states, 26 states have (on average 94.38461538461539) internal successors, (2454), 26 states have internal predecessors, (2454), 0 states have call successors, (0), 0 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 18:57:05,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:05,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 280 [2022-12-13 18:57:05,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:07,357 INFO L130 PetriNetUnfolder]: 407/715 cut-off events. [2022-12-13 18:57:07,358 INFO L131 PetriNetUnfolder]: For 5254/5254 co-relation queries the response was YES. [2022-12-13 18:57:07,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3791 conditions, 715 events. 407/715 cut-off events. For 5254/5254 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3226 event pairs, 30 based on Foata normal form. 40/755 useless extension candidates. Maximal degree in co-relation 3760. Up to 401 conditions per place. [2022-12-13 18:57:07,367 INFO L137 encePairwiseOnDemand]: 272/280 looper letters, 72 selfloop transitions, 43 changer transitions 5/120 dead transitions. [2022-12-13 18:57:07,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 120 transitions, 1253 flow [2022-12-13 18:57:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 18:57:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 18:57:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2239 transitions. [2022-12-13 18:57:07,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34767080745341616 [2022-12-13 18:57:07,375 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2239 transitions. [2022-12-13 18:57:07,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2239 transitions. [2022-12-13 18:57:07,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:07,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2239 transitions. [2022-12-13 18:57:07,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 97.34782608695652) internal successors, (2239), 23 states have internal predecessors, (2239), 0 states have call successors, (0), 0 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 18:57:07,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 280.0) internal successors, (6720), 24 states have internal predecessors, (6720), 0 states have call successors, (0), 0 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 18:57:07,394 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 280.0) internal successors, (6720), 24 states have internal predecessors, (6720), 0 states have call successors, (0), 0 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 18:57:07,394 INFO L175 Difference]: Start difference. First operand has 67 places, 43 transitions, 461 flow. Second operand 23 states and 2239 transitions. [2022-12-13 18:57:07,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 120 transitions, 1253 flow [2022-12-13 18:57:07,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 120 transitions, 1120 flow, removed 46 selfloop flow, removed 8 redundant places. [2022-12-13 18:57:07,408 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 925 flow [2022-12-13 18:57:07,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=925, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2022-12-13 18:57:07,408 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2022-12-13 18:57:07,409 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 925 flow [2022-12-13 18:57:07,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 94.38461538461539) internal successors, (2454), 26 states have internal predecessors, (2454), 0 states have call successors, (0), 0 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 18:57:07,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:07,409 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:07,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 18:57:07,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 18:57:07,610 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:57:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash 302737269, now seen corresponding path program 4 times [2022-12-13 18:57:07,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:07,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85473455] [2022-12-13 18:57:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:07,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:08,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85473455] [2022-12-13 18:57:08,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85473455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598993885] [2022-12-13 18:57:08,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:57:08,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:08,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:08,029 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:08,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:57:08,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:57:08,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:08,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 18:57:08,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:08,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:08,629 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 18:57:08,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 195 [2022-12-13 18:57:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:09,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598993885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:09,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:09,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2022-12-13 18:57:09,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988883706] [2022-12-13 18:57:09,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:09,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 18:57:09,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:09,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 18:57:09,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-12-13 18:57:09,993 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2022-12-13 18:57:09,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 925 flow. Second operand has 25 states, 25 states have (on average 99.44) internal successors, (2486), 25 states have internal predecessors, (2486), 0 states have call successors, (0), 0 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 18:57:09,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:09,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2022-12-13 18:57:09,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:11,083 INFO L130 PetriNetUnfolder]: 527/907 cut-off events. [2022-12-13 18:57:11,083 INFO L131 PetriNetUnfolder]: For 9325/9325 co-relation queries the response was YES. [2022-12-13 18:57:11,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5008 conditions, 907 events. 527/907 cut-off events. For 9325/9325 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4191 event pairs, 24 based on Foata normal form. 44/951 useless extension candidates. Maximal degree in co-relation 4967. Up to 493 conditions per place. [2022-12-13 18:57:11,088 INFO L137 encePairwiseOnDemand]: 272/280 looper letters, 93 selfloop transitions, 61 changer transitions 4/158 dead transitions. [2022-12-13 18:57:11,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 158 transitions, 1899 flow [2022-12-13 18:57:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 18:57:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 18:57:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2150 transitions. [2022-12-13 18:57:11,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3656462585034014 [2022-12-13 18:57:11,091 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2150 transitions. [2022-12-13 18:57:11,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2150 transitions. [2022-12-13 18:57:11,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:11,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2150 transitions. [2022-12-13 18:57:11,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 102.38095238095238) internal successors, (2150), 21 states have internal predecessors, (2150), 0 states have call successors, (0), 0 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 18:57:11,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 280.0) internal successors, (6160), 22 states have internal predecessors, (6160), 0 states have call successors, (0), 0 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 18:57:11,098 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 280.0) internal successors, (6160), 22 states have internal predecessors, (6160), 0 states have call successors, (0), 0 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 18:57:11,098 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 925 flow. Second operand 21 states and 2150 transitions. [2022-12-13 18:57:11,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 158 transitions, 1899 flow [2022-12-13 18:57:11,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 158 transitions, 1619 flow, removed 120 selfloop flow, removed 10 redundant places. [2022-12-13 18:57:11,115 INFO L231 Difference]: Finished difference. Result has 110 places, 107 transitions, 1323 flow [2022-12-13 18:57:11,116 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1323, PETRI_PLACES=110, PETRI_TRANSITIONS=107} [2022-12-13 18:57:11,116 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 82 predicate places. [2022-12-13 18:57:11,116 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 107 transitions, 1323 flow [2022-12-13 18:57:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 99.44) internal successors, (2486), 25 states have internal predecessors, (2486), 0 states have call successors, (0), 0 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 18:57:11,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:11,117 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:11,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 18:57:11,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 18:57:11,318 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:57:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash 796132270, now seen corresponding path program 2 times [2022-12-13 18:57:11,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:11,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272064036] [2022-12-13 18:57:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:11,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:11,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272064036] [2022-12-13 18:57:11,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272064036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:11,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453497619] [2022-12-13 18:57:11,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:57:11,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:11,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:11,505 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:11,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:57:11,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:57:11,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:11,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:57:11,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:11,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:11,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453497619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:11,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:11,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 18:57:11,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234674256] [2022-12-13 18:57:11,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:11,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 18:57:11,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 18:57:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-12-13 18:57:12,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 280 [2022-12-13 18:57:12,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 107 transitions, 1323 flow. Second operand has 23 states, 23 states have (on average 110.56521739130434) internal successors, (2543), 23 states have internal predecessors, (2543), 0 states have call successors, (0), 0 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 18:57:12,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:12,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 280 [2022-12-13 18:57:12,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:12,255 INFO L130 PetriNetUnfolder]: 306/583 cut-off events. [2022-12-13 18:57:12,255 INFO L131 PetriNetUnfolder]: For 6565/6565 co-relation queries the response was YES. [2022-12-13 18:57:12,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2938 conditions, 583 events. 306/583 cut-off events. For 6565/6565 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2679 event pairs, 115 based on Foata normal form. 124/701 useless extension candidates. Maximal degree in co-relation 2889. Up to 356 conditions per place. [2022-12-13 18:57:12,258 INFO L137 encePairwiseOnDemand]: 273/280 looper letters, 35 selfloop transitions, 4 changer transitions 48/88 dead transitions. [2022-12-13 18:57:12,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 88 transitions, 1008 flow [2022-12-13 18:57:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:57:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 18:57:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1132 transitions. [2022-12-13 18:57:12,260 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4042857142857143 [2022-12-13 18:57:12,260 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1132 transitions. [2022-12-13 18:57:12,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1132 transitions. [2022-12-13 18:57:12,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:12,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1132 transitions. [2022-12-13 18:57:12,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.2) internal successors, (1132), 10 states have internal predecessors, (1132), 0 states have call successors, (0), 0 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 18:57:12,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 18:57:12,263 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 280.0) internal successors, (3080), 11 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 18:57:12,263 INFO L175 Difference]: Start difference. First operand has 110 places, 107 transitions, 1323 flow. Second operand 10 states and 1132 transitions. [2022-12-13 18:57:12,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 88 transitions, 1008 flow [2022-12-13 18:57:12,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 88 transitions, 904 flow, removed 19 selfloop flow, removed 21 redundant places. [2022-12-13 18:57:12,278 INFO L231 Difference]: Finished difference. Result has 95 places, 40 transitions, 412 flow [2022-12-13 18:57:12,279 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=412, PETRI_PLACES=95, PETRI_TRANSITIONS=40} [2022-12-13 18:57:12,279 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2022-12-13 18:57:12,279 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 40 transitions, 412 flow [2022-12-13 18:57:12,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 110.56521739130434) internal successors, (2543), 23 states have internal predecessors, (2543), 0 states have call successors, (0), 0 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 18:57:12,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:12,280 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:12,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 18:57:12,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 18:57:12,481 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:57:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:12,482 INFO L85 PathProgramCache]: Analyzing trace with hash 435109389, now seen corresponding path program 3 times [2022-12-13 18:57:12,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:12,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834803144] [2022-12-13 18:57:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:12,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:13,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834803144] [2022-12-13 18:57:13,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834803144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460877345] [2022-12-13 18:57:13,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:57:13,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:13,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:13,560 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:13,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:57:13,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:57:13,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:13,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:57:13,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:57:13,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:14,109 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 18:57:14,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 209 treesize of output 196 [2022-12-13 18:57:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:57:14,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460877345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:14,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:14,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 18 [2022-12-13 18:57:14,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20771837] [2022-12-13 18:57:14,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:14,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:57:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:14,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:57:14,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:57:15,196 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 280 [2022-12-13 18:57:15,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 40 transitions, 412 flow. Second operand has 20 states, 20 states have (on average 101.75) internal successors, (2035), 20 states have internal predecessors, (2035), 0 states have call successors, (0), 0 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 18:57:15,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:15,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 280 [2022-12-13 18:57:15,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:15,890 INFO L130 PetriNetUnfolder]: 245/436 cut-off events. [2022-12-13 18:57:15,891 INFO L131 PetriNetUnfolder]: For 5901/5901 co-relation queries the response was YES. [2022-12-13 18:57:15,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2407 conditions, 436 events. 245/436 cut-off events. For 5901/5901 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1634 event pairs, 8 based on Foata normal form. 40/476 useless extension candidates. Maximal degree in co-relation 2375. Up to 189 conditions per place. [2022-12-13 18:57:15,893 INFO L137 encePairwiseOnDemand]: 272/280 looper letters, 50 selfloop transitions, 34 changer transitions 6/90 dead transitions. [2022-12-13 18:57:15,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 899 flow [2022-12-13 18:57:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 18:57:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 18:57:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2176 transitions. [2022-12-13 18:57:15,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37006802721088433 [2022-12-13 18:57:15,895 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2176 transitions. [2022-12-13 18:57:15,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2176 transitions. [2022-12-13 18:57:15,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:15,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2176 transitions. [2022-12-13 18:57:15,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 103.61904761904762) internal successors, (2176), 21 states have internal predecessors, (2176), 0 states have call successors, (0), 0 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 18:57:15,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 280.0) internal successors, (6160), 22 states have internal predecessors, (6160), 0 states have call successors, (0), 0 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 18:57:15,901 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 280.0) internal successors, (6160), 22 states have internal predecessors, (6160), 0 states have call successors, (0), 0 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 18:57:15,901 INFO L175 Difference]: Start difference. First operand has 95 places, 40 transitions, 412 flow. Second operand 21 states and 2176 transitions. [2022-12-13 18:57:15,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 899 flow [2022-12-13 18:57:15,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 786 flow, removed 32 selfloop flow, removed 21 redundant places. [2022-12-13 18:57:15,907 INFO L231 Difference]: Finished difference. Result has 76 places, 52 transitions, 591 flow [2022-12-13 18:57:15,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=591, PETRI_PLACES=76, PETRI_TRANSITIONS=52} [2022-12-13 18:57:15,907 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2022-12-13 18:57:15,907 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 52 transitions, 591 flow [2022-12-13 18:57:15,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 101.75) internal successors, (2035), 20 states have internal predecessors, (2035), 0 states have call successors, (0), 0 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 18:57:15,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:15,908 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:15,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 18:57:16,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 18:57:16,108 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:57:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:16,109 INFO L85 PathProgramCache]: Analyzing trace with hash 604700726, now seen corresponding path program 5 times [2022-12-13 18:57:16,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:16,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056738916] [2022-12-13 18:57:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:16,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:57:16,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:16,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056738916] [2022-12-13 18:57:16,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056738916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:16,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715641431] [2022-12-13 18:57:16,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:57:16,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:16,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:16,219 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:16,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:57:16,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 18:57:16,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:57:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:16,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:57:16,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 120 [2022-12-13 18:57:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:57:16,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:16,656 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:57:16,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 142 [2022-12-13 18:57:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:57:16,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715641431] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:16,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:16,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2022-12-13 18:57:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089570961] [2022-12-13 18:57:16,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:16,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:57:16,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:57:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:57:16,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 280 [2022-12-13 18:57:16,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 52 transitions, 591 flow. Second operand has 15 states, 15 states have (on average 111.0) internal successors, (1665), 15 states have internal predecessors, (1665), 0 states have call successors, (0), 0 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 18:57:16,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:16,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 280 [2022-12-13 18:57:16,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:17,058 INFO L130 PetriNetUnfolder]: 469/820 cut-off events. [2022-12-13 18:57:17,058 INFO L131 PetriNetUnfolder]: For 8340/8340 co-relation queries the response was YES. [2022-12-13 18:57:17,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4766 conditions, 820 events. 469/820 cut-off events. For 8340/8340 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3767 event pairs, 48 based on Foata normal form. 48/868 useless extension candidates. Maximal degree in co-relation 4743. Up to 389 conditions per place. [2022-12-13 18:57:17,062 INFO L137 encePairwiseOnDemand]: 274/280 looper letters, 50 selfloop transitions, 44 changer transitions 3/97 dead transitions. [2022-12-13 18:57:17,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 1310 flow [2022-12-13 18:57:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:57:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:57:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 918 transitions. [2022-12-13 18:57:17,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40982142857142856 [2022-12-13 18:57:17,064 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 918 transitions. [2022-12-13 18:57:17,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 918 transitions. [2022-12-13 18:57:17,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:17,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 918 transitions. [2022-12-13 18:57:17,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.75) internal successors, (918), 8 states have internal predecessors, (918), 0 states have call successors, (0), 0 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 18:57:17,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 18:57:17,066 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 280.0) internal successors, (2520), 9 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 18:57:17,066 INFO L175 Difference]: Start difference. First operand has 76 places, 52 transitions, 591 flow. Second operand 8 states and 918 transitions. [2022-12-13 18:57:17,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 1310 flow [2022-12-13 18:57:17,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 1227 flow, removed 30 selfloop flow, removed 7 redundant places. [2022-12-13 18:57:17,077 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 1027 flow [2022-12-13 18:57:17,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1027, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2022-12-13 18:57:17,078 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 52 predicate places. [2022-12-13 18:57:17,078 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 1027 flow [2022-12-13 18:57:17,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 111.0) internal successors, (1665), 15 states have internal predecessors, (1665), 0 states have call successors, (0), 0 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 18:57:17,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:17,078 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:17,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 18:57:17,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:17,279 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:57:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1565855287, now seen corresponding path program 4 times [2022-12-13 18:57:17,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:17,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572791914] [2022-12-13 18:57:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:17,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:17,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:17,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572791914] [2022-12-13 18:57:17,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572791914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:17,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632502900] [2022-12-13 18:57:17,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:57:17,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:17,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:17,937 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:17,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:57:18,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:57:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:18,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 18:57:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:57:18,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:18,888 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-12-13 18:57:18,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 280 [2022-12-13 18:57:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:57:19,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632502900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:19,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:19,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 27 [2022-12-13 18:57:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034845890] [2022-12-13 18:57:19,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:19,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 18:57:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 18:57:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-12-13 18:57:20,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 280 [2022-12-13 18:57:20,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 1027 flow. Second operand has 29 states, 29 states have (on average 101.48275862068965) internal successors, (2943), 29 states have internal predecessors, (2943), 0 states have call successors, (0), 0 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 18:57:20,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:20,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 280 [2022-12-13 18:57:20,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:24,762 INFO L130 PetriNetUnfolder]: 1135/1930 cut-off events. [2022-12-13 18:57:24,762 INFO L131 PetriNetUnfolder]: For 35069/35069 co-relation queries the response was YES. [2022-12-13 18:57:24,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13208 conditions, 1930 events. 1135/1930 cut-off events. For 35069/35069 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 10666 event pairs, 48 based on Foata normal form. 140/2070 useless extension candidates. Maximal degree in co-relation 13180. Up to 991 conditions per place. [2022-12-13 18:57:24,774 INFO L137 encePairwiseOnDemand]: 272/280 looper letters, 149 selfloop transitions, 165 changer transitions 10/324 dead transitions. [2022-12-13 18:57:24,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 324 transitions, 4644 flow [2022-12-13 18:57:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 18:57:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 18:57:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 5441 transitions. [2022-12-13 18:57:24,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37369505494505495 [2022-12-13 18:57:24,780 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 5441 transitions. [2022-12-13 18:57:24,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 5441 transitions. [2022-12-13 18:57:24,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:24,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 5441 transitions. [2022-12-13 18:57:24,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 104.63461538461539) internal successors, (5441), 52 states have internal predecessors, (5441), 0 states have call successors, (0), 0 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 18:57:24,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 280.0) internal successors, (14840), 53 states have internal predecessors, (14840), 0 states have call successors, (0), 0 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 18:57:24,796 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 280.0) internal successors, (14840), 53 states have internal predecessors, (14840), 0 states have call successors, (0), 0 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 18:57:24,796 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 1027 flow. Second operand 52 states and 5441 transitions. [2022-12-13 18:57:24,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 324 transitions, 4644 flow [2022-12-13 18:57:24,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 324 transitions, 4354 flow, removed 143 selfloop flow, removed 1 redundant places. [2022-12-13 18:57:24,827 INFO L231 Difference]: Finished difference. Result has 140 places, 214 transitions, 3682 flow [2022-12-13 18:57:24,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3682, PETRI_PLACES=140, PETRI_TRANSITIONS=214} [2022-12-13 18:57:24,827 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2022-12-13 18:57:24,827 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 214 transitions, 3682 flow [2022-12-13 18:57:24,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 101.48275862068965) internal successors, (2943), 29 states have internal predecessors, (2943), 0 states have call successors, (0), 0 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 18:57:24,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:24,828 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:24,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 18:57:25,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:25,029 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:57:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:25,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1528357687, now seen corresponding path program 5 times [2022-12-13 18:57:25,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:25,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879740629] [2022-12-13 18:57:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:25,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:26,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:26,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879740629] [2022-12-13 18:57:26,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879740629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:26,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316716452] [2022-12-13 18:57:26,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:57:26,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:26,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:26,180 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:26,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:57:26,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 18:57:26,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 18:57:26,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:26,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:27,497 INFO L321 Elim1Store]: treesize reduction 64, result has 56.5 percent of original size [2022-12-13 18:57:27,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 271 treesize of output 252 [2022-12-13 18:57:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:28,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316716452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:28,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:28,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2022-12-13 18:57:28,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690049858] [2022-12-13 18:57:28,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:28,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 18:57:28,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 18:57:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 18:57:30,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 280 [2022-12-13 18:57:30,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 214 transitions, 3682 flow. Second operand has 36 states, 36 states have (on average 99.25) internal successors, (3573), 36 states have internal predecessors, (3573), 0 states have call successors, (0), 0 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 18:57:30,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:30,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 280 [2022-12-13 18:57:30,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:35,642 INFO L130 PetriNetUnfolder]: 1762/2946 cut-off events. [2022-12-13 18:57:35,643 INFO L131 PetriNetUnfolder]: For 78994/78994 co-relation queries the response was YES. [2022-12-13 18:57:35,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23264 conditions, 2946 events. 1762/2946 cut-off events. For 78994/78994 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 16120 event pairs, 114 based on Foata normal form. 172/3118 useless extension candidates. Maximal degree in co-relation 23226. Up to 1625 conditions per place. [2022-12-13 18:57:35,660 INFO L137 encePairwiseOnDemand]: 271/280 looper letters, 304 selfloop transitions, 200 changer transitions 12/516 dead transitions. [2022-12-13 18:57:35,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 516 transitions, 8975 flow [2022-12-13 18:57:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 18:57:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-13 18:57:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 5241 transitions. [2022-12-13 18:57:35,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36701680672268905 [2022-12-13 18:57:35,665 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 5241 transitions. [2022-12-13 18:57:35,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 5241 transitions. [2022-12-13 18:57:35,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:35,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 5241 transitions. [2022-12-13 18:57:35,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 102.76470588235294) internal successors, (5241), 51 states have internal predecessors, (5241), 0 states have call successors, (0), 0 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 18:57:35,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 280.0) internal successors, (14560), 52 states have internal predecessors, (14560), 0 states have call successors, (0), 0 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 18:57:35,678 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 280.0) internal successors, (14560), 52 states have internal predecessors, (14560), 0 states have call successors, (0), 0 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 18:57:35,678 INFO L175 Difference]: Start difference. First operand has 140 places, 214 transitions, 3682 flow. Second operand 51 states and 5241 transitions. [2022-12-13 18:57:35,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 516 transitions, 8975 flow [2022-12-13 18:57:35,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 516 transitions, 7532 flow, removed 674 selfloop flow, removed 12 redundant places. [2022-12-13 18:57:35,893 INFO L231 Difference]: Finished difference. Result has 210 places, 382 transitions, 6447 flow [2022-12-13 18:57:35,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=6447, PETRI_PLACES=210, PETRI_TRANSITIONS=382} [2022-12-13 18:57:35,893 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 182 predicate places. [2022-12-13 18:57:35,893 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 382 transitions, 6447 flow [2022-12-13 18:57:35,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 99.25) internal successors, (3573), 36 states have internal predecessors, (3573), 0 states have call successors, (0), 0 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 18:57:35,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:35,894 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:35,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 18:57:36,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 18:57:36,095 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:57:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:36,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1528318628, now seen corresponding path program 6 times [2022-12-13 18:57:36,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:36,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842216162] [2022-12-13 18:57:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:36,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:37,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:37,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842216162] [2022-12-13 18:57:37,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842216162] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:37,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411417330] [2022-12-13 18:57:37,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:57:37,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:37,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:37,244 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:37,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 18:57:37,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:57:37,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:37,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 18:57:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:37,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 18:57:37,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 18:57:37,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:57:37,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-13 18:57:37,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:57:37,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-13 18:57:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:38,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:39,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:57:39,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 135 [2022-12-13 18:57:39,701 INFO L321 Elim1Store]: treesize reduction 42, result has 85.1 percent of original size [2022-12-13 18:57:39,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 815 treesize of output 932 [2022-12-13 18:57:39,807 INFO L321 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2022-12-13 18:57:39,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 688 treesize of output 606 [2022-12-13 18:57:39,907 INFO L321 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2022-12-13 18:57:39,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 528 treesize of output 526 [2022-12-13 18:58:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:58:17,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411417330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:58:17,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:58:17,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-12-13 18:58:17,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496910080] [2022-12-13 18:58:17,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:58:17,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 18:58:17,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:58:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 18:58:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1090, Unknown=2, NotChecked=0, Total=1406 [2022-12-13 18:58:19,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 280 [2022-12-13 18:58:19,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 382 transitions, 6447 flow. Second operand has 38 states, 38 states have (on average 80.1842105263158) internal successors, (3047), 38 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 18:58:19,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:58:19,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 280 [2022-12-13 18:58:19,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:58:31,287 INFO L130 PetriNetUnfolder]: 2444/4212 cut-off events. [2022-12-13 18:58:31,287 INFO L131 PetriNetUnfolder]: For 208661/208661 co-relation queries the response was YES. [2022-12-13 18:58:31,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34514 conditions, 4212 events. 2444/4212 cut-off events. For 208661/208661 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25442 event pairs, 212 based on Foata normal form. 228/4440 useless extension candidates. Maximal degree in co-relation 34445. Up to 1856 conditions per place. [2022-12-13 18:58:31,316 INFO L137 encePairwiseOnDemand]: 271/280 looper letters, 403 selfloop transitions, 281 changer transitions 12/696 dead transitions. [2022-12-13 18:58:31,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 696 transitions, 12381 flow [2022-12-13 18:58:31,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 18:58:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-13 18:58:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3883 transitions. [2022-12-13 18:58:31,320 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29506079027355625 [2022-12-13 18:58:31,320 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3883 transitions. [2022-12-13 18:58:31,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3883 transitions. [2022-12-13 18:58:31,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:58:31,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3883 transitions. [2022-12-13 18:58:31,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 82.61702127659575) internal successors, (3883), 47 states have internal predecessors, (3883), 0 states have call successors, (0), 0 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 18:58:31,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 280.0) internal successors, (13440), 48 states have internal predecessors, (13440), 0 states have call successors, (0), 0 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 18:58:31,338 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 280.0) internal successors, (13440), 48 states have internal predecessors, (13440), 0 states have call successors, (0), 0 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 18:58:31,338 INFO L175 Difference]: Start difference. First operand has 210 places, 382 transitions, 6447 flow. Second operand 47 states and 3883 transitions. [2022-12-13 18:58:31,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 696 transitions, 12381 flow [2022-12-13 18:58:31,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 696 transitions, 11494 flow, removed 423 selfloop flow, removed 14 redundant places. [2022-12-13 18:58:31,941 INFO L231 Difference]: Finished difference. Result has 256 places, 554 transitions, 10152 flow [2022-12-13 18:58:31,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=5408, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=10152, PETRI_PLACES=256, PETRI_TRANSITIONS=554} [2022-12-13 18:58:31,942 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 228 predicate places. [2022-12-13 18:58:31,942 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 554 transitions, 10152 flow [2022-12-13 18:58:31,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 80.1842105263158) internal successors, (3047), 38 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 18:58:31,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:58:31,942 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:58:31,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 18:58:32,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 18:58:32,144 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 18:58:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:58:32,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1567105207, now seen corresponding path program 6 times [2022-12-13 18:58:32,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:58:32,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218529837] [2022-12-13 18:58:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:58:32,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:58:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:58:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:58:33,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:58:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218529837] [2022-12-13 18:58:33,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218529837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:58:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565943977] [2022-12-13 18:58:33,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:58:33,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:58:33,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:58:33,060 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:58:33,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c117d6-4b6f-4a98-a5b1-a589870cb669/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 18:58:33,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:58:33,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:58:33,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 18:58:33,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:58:33,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:58:33,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:58:33,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 18:58:33,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:58:33,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 18:58:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:58:34,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:58:36,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:58:36,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 475 treesize of output 320 [2022-12-13 18:58:37,288 INFO L321 Elim1Store]: treesize reduction 28, result has 93.3 percent of original size [2022-12-13 18:58:37,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 1969 treesize of output 2121 [2022-12-13 18:58:37,520 INFO L321 Elim1Store]: treesize reduction 28, result has 82.2 percent of original size [2022-12-13 18:58:37,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1723 treesize of output 1676 [2022-12-13 18:58:37,752 INFO L321 Elim1Store]: treesize reduction 28, result has 82.2 percent of original size [2022-12-13 18:58:37,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1547 treesize of output 1588 [2022-12-13 18:58:38,003 INFO L321 Elim1Store]: treesize reduction 28, result has 82.2 percent of original size [2022-12-13 18:58:38,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1459 treesize of output 1412 [2022-12-13 18:58:38,250 INFO L321 Elim1Store]: treesize reduction 28, result has 82.2 percent of original size [2022-12-13 18:58:38,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1283 treesize of output 1324