./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/reorder_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/reorder_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b8118921f4e94a266cc060fbf2fdaa97ed8f96343f174115bf05a8f09a1b77a8 --- 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 15:45:47,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:45:47,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:45:47,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:45:47,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:45:47,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:45:47,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:45:47,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:45:47,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:45:47,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:45:47,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:45:47,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:45:47,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:45:47,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:45:47,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:45:47,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:45:47,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:45:47,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:45:47,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:45:47,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:45:47,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:45:47,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:45:47,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:45:47,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:45:47,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:45:47,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:45:47,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:45:47,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:45:47,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:45:47,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:45:47,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:45:47,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:45:47,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:45:47,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:45:47,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:45:47,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:45:47,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:45:47,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:45:47,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:45:47,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:45:47,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:45:47,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 15:45:47,625 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:45:47,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:45:47,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:45:47,626 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:45:47,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:45:47,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:45:47,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:45:47,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:45:47,627 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:45:47,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:45:47,628 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:45:47,628 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:45:47,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:45:47,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:45:47,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:45:47,628 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:45:47,629 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:45:47,629 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:45:47,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:45:47,629 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:45:47,629 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:45:47,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:45:47,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:45:47,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:45:47,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:45:47,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:45:47,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:45:47,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:45:47,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:45:47,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:45:47,630 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:45:47,630 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:45:47,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:45:47,631 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:45:47,631 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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8118921f4e94a266cc060fbf2fdaa97ed8f96343f174115bf05a8f09a1b77a8 [2022-12-13 15:45:47,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:45:47,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:45:47,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:45:47,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:45:47,835 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:45:47,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/reorder_2.i [2022-12-13 15:45:50,410 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:45:50,604 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:45:50,604 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/sv-benchmarks/c/pthread/reorder_2.i [2022-12-13 15:45:50,615 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/data/5e6c4b06b/7b0efb33ec5648118bfde99c8f4528da/FLAGf6cffbd22 [2022-12-13 15:45:50,976 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/data/5e6c4b06b/7b0efb33ec5648118bfde99c8f4528da [2022-12-13 15:45:50,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:45:50,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:45:50,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:45:50,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:45:50,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:45:50,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:45:50" (1/1) ... [2022-12-13 15:45:50,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@203de37b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:50, skipping insertion in model container [2022-12-13 15:45:50,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:45:50" (1/1) ... [2022-12-13 15:45:50,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:45:51,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:45:51,343 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,349 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,351 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,353 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,354 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,356 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,357 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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/sv-benchmarks/c/pthread/reorder_2.i[59859,59872] [2022-12-13 15:45:51,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:45:51,366 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:45:51,394 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,397 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,398 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,399 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,400 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,402 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:45:51,402 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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/sv-benchmarks/c/pthread/reorder_2.i[59859,59872] [2022-12-13 15:45:51,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:45:51,450 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:45:51,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51 WrapperNode [2022-12-13 15:45:51,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:45:51,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:45:51,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:45:51,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:45:51,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,486 INFO L138 Inliner]: procedures = 370, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 148 [2022-12-13 15:45:51,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:45:51,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:45:51,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:45:51,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:45:51,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,504 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:45:51,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:45:51,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:45:51,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:45:51,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (1/1) ... [2022-12-13 15:45:51,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:45:51,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:51,539 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:45:51,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:45:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:45:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:45:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:45:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-12-13 15:45:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-12-13 15:45:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:45:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:45:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-12-13 15:45:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-12-13 15:45:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:45:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:45:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:45:51,567 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 15:45:51,676 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:45:51,677 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:45:51,943 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:45:51,952 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:45:51,952 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 15:45:51,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:45:51 BoogieIcfgContainer [2022-12-13 15:45:51,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:45:51,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:45:51,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:45:51,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:45:51,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:45:50" (1/3) ... [2022-12-13 15:45:51,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bba82e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:45:51, skipping insertion in model container [2022-12-13 15:45:51,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:51" (2/3) ... [2022-12-13 15:45:51,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bba82e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:45:51, skipping insertion in model container [2022-12-13 15:45:51,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:45:51" (3/3) ... [2022-12-13 15:45:51,965 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_2.i [2022-12-13 15:45:51,983 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:45:51,983 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-13 15:45:51,984 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:45:52,041 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 15:45:52,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 430 flow [2022-12-13 15:45:52,147 INFO L130 PetriNetUnfolder]: 37/429 cut-off events. [2022-12-13 15:45:52,147 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 15:45:52,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 429 events. 37/429 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1748 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 236. Up to 8 conditions per place. [2022-12-13 15:45:52,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 430 flow [2022-12-13 15:45:52,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 430 flow [2022-12-13 15:45:52,159 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:45:52,166 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 430 flow [2022-12-13 15:45:52,168 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 430 flow [2022-12-13 15:45:52,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 430 flow [2022-12-13 15:45:52,214 INFO L130 PetriNetUnfolder]: 37/429 cut-off events. [2022-12-13 15:45:52,214 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 15:45:52,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 429 events. 37/429 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1748 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 236. Up to 8 conditions per place. [2022-12-13 15:45:52,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 2694 [2022-12-13 15:46:01,569 INFO L134 LiptonReduction]: Checked pairs total: 4247 [2022-12-13 15:46:01,569 INFO L136 LiptonReduction]: Total number of compositions: 238 [2022-12-13 15:46:01,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:46:01,586 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@580a0541, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:46:01,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-12-13 15:46:01,588 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 15:46:01,588 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:46:01,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:01,589 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 15:46:01,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash 751, now seen corresponding path program 1 times [2022-12-13 15:46:01,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:01,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692898230] [2022-12-13 15:46:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:01,683 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 15:46:01,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:01,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692898230] [2022-12-13 15:46:01,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692898230] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:01,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:01,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 15:46:01,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134675447] [2022-12-13 15:46:01,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:01,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:46:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:46:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:46:01,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 442 [2022-12-13 15:46:01,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 134 flow. Second operand has 2 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 15:46:01,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:01,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 442 [2022-12-13 15:46:01,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:01,822 INFO L130 PetriNetUnfolder]: 262/592 cut-off events. [2022-12-13 15:46:01,822 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 15:46:01,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158 conditions, 592 events. 262/592 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3159 event pairs, 246 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 884. Up to 532 conditions per place. [2022-12-13 15:46:01,826 INFO L137 encePairwiseOnDemand]: 430/442 looper letters, 32 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2022-12-13 15:46:01,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 174 flow [2022-12-13 15:46:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:46:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 15:46:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 416 transitions. [2022-12-13 15:46:01,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2022-12-13 15:46:01,837 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 416 transitions. [2022-12-13 15:46:01,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 416 transitions. [2022-12-13 15:46:01,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:01,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 416 transitions. [2022-12-13 15:46:01,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 208.0) internal successors, (416), 2 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 15:46:01,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 442.0) internal successors, (1326), 3 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 15:46:01,846 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 442.0) internal successors, (1326), 3 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 15:46:01,847 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 134 flow. Second operand 2 states and 416 transitions. [2022-12-13 15:46:01,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 174 flow [2022-12-13 15:46:01,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:46:01,852 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 110 flow [2022-12-13 15:46:01,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2022-12-13 15:46:01,856 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2022-12-13 15:46:01,856 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 110 flow [2022-12-13 15:46:01,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 15:46:01,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:01,856 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:46:01,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:46:01,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash 23753, now seen corresponding path program 1 times [2022-12-13 15:46:01,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:01,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212041479] [2022-12-13 15:46:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:01,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:46:02,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:02,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212041479] [2022-12-13 15:46:02,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212041479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:02,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:02,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:02,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314833474] [2022-12-13 15:46:02,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:02,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:02,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 442 [2022-12-13 15:46:02,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 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 15:46:02,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:02,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 442 [2022-12-13 15:46:02,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:02,295 INFO L130 PetriNetUnfolder]: 262/583 cut-off events. [2022-12-13 15:46:02,295 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 15:46:02,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 583 events. 262/583 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3107 event pairs, 214 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 1145. Up to 467 conditions per place. [2022-12-13 15:46:02,297 INFO L137 encePairwiseOnDemand]: 437/442 looper letters, 33 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2022-12-13 15:46:02,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 186 flow [2022-12-13 15:46:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2022-12-13 15:46:02,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4200603318250377 [2022-12-13 15:46:02,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2022-12-13 15:46:02,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2022-12-13 15:46:02,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:02,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2022-12-13 15:46:02,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 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 15:46:02,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:02,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:02,307 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 110 flow. Second operand 3 states and 557 transitions. [2022-12-13 15:46:02,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 186 flow [2022-12-13 15:46:02,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 186 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:46:02,309 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 112 flow [2022-12-13 15:46:02,309 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-12-13 15:46:02,309 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2022-12-13 15:46:02,309 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 112 flow [2022-12-13 15:46:02,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 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 15:46:02,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:02,310 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:46:02,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:46:02,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:02,311 INFO L85 PathProgramCache]: Analyzing trace with hash 23754, now seen corresponding path program 1 times [2022-12-13 15:46:02,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:02,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490147131] [2022-12-13 15:46:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:02,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:02,395 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 15:46:02,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:02,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490147131] [2022-12-13 15:46:02,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490147131] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:02,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:02,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:02,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075005311] [2022-12-13 15:46:02,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:02,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:02,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:02,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:02,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:02,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 442 [2022-12-13 15:46:02,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 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 15:46:02,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:02,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 442 [2022-12-13 15:46:02,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:02,563 INFO L130 PetriNetUnfolder]: 262/574 cut-off events. [2022-12-13 15:46:02,563 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-12-13 15:46:02,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 574 events. 262/574 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2946 event pairs, 246 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 1169. Up to 531 conditions per place. [2022-12-13 15:46:02,565 INFO L137 encePairwiseOnDemand]: 439/442 looper letters, 31 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 15:46:02,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 172 flow [2022-12-13 15:46:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2022-12-13 15:46:02,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41704374057315236 [2022-12-13 15:46:02,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2022-12-13 15:46:02,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2022-12-13 15:46:02,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:02,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2022-12-13 15:46:02,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 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 15:46:02,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:02,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:02,571 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 112 flow. Second operand 3 states and 553 transitions. [2022-12-13 15:46:02,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 172 flow [2022-12-13 15:46:02,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:02,573 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 104 flow [2022-12-13 15:46:02,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2022-12-13 15:46:02,574 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -13 predicate places. [2022-12-13 15:46:02,574 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 104 flow [2022-12-13 15:46:02,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 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 15:46:02,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:02,575 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:46:02,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:46:02,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:02,576 INFO L85 PathProgramCache]: Analyzing trace with hash 24086, now seen corresponding path program 1 times [2022-12-13 15:46:02,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:02,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452021175] [2022-12-13 15:46:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:02,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:02,720 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 15:46:02,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:02,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452021175] [2022-12-13 15:46:02,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452021175] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:02,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:02,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:02,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918309274] [2022-12-13 15:46:02,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:02,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:02,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:02,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:02,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:02,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 442 [2022-12-13 15:46:02,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 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 15:46:02,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:02,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 442 [2022-12-13 15:46:02,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:02,944 INFO L130 PetriNetUnfolder]: 263/617 cut-off events. [2022-12-13 15:46:02,945 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:46:02,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1203 conditions, 617 events. 263/617 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3401 event pairs, 246 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 1197. Up to 527 conditions per place. [2022-12-13 15:46:02,948 INFO L137 encePairwiseOnDemand]: 435/442 looper letters, 40 selfloop transitions, 4 changer transitions 3/55 dead transitions. [2022-12-13 15:46:02,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 228 flow [2022-12-13 15:46:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-12-13 15:46:02,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42609351432880843 [2022-12-13 15:46:02,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-12-13 15:46:02,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-12-13 15:46:02,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:02,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-12-13 15:46:02,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 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 15:46:02,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:02,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:02,953 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 104 flow. Second operand 3 states and 565 transitions. [2022-12-13 15:46:02,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 228 flow [2022-12-13 15:46:02,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:46:02,955 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 133 flow [2022-12-13 15:46:02,955 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2022-12-13 15:46:02,956 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2022-12-13 15:46:02,956 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 133 flow [2022-12-13 15:46:02,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 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 15:46:02,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:02,957 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:46:02,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:46:02,957 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:02,957 INFO L85 PathProgramCache]: Analyzing trace with hash 24087, now seen corresponding path program 1 times [2022-12-13 15:46:02,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:02,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705688451] [2022-12-13 15:46:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:02,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:03,018 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 15:46:03,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705688451] [2022-12-13 15:46:03,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705688451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:03,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:03,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:03,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647032393] [2022-12-13 15:46:03,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:03,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:03,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:03,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:03,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:03,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 442 [2022-12-13 15:46:03,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 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 15:46:03,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:03,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 442 [2022-12-13 15:46:03,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:03,163 INFO L130 PetriNetUnfolder]: 244/557 cut-off events. [2022-12-13 15:46:03,163 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 15:46:03,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 557 events. 244/557 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2962 event pairs, 196 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1173. Up to 433 conditions per place. [2022-12-13 15:46:03,165 INFO L137 encePairwiseOnDemand]: 437/442 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2022-12-13 15:46:03,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 211 flow [2022-12-13 15:46:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-12-13 15:46:03,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4276018099547511 [2022-12-13 15:46:03,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-12-13 15:46:03,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-12-13 15:46:03,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:03,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-12-13 15:46:03,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:03,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:03,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:03,170 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 133 flow. Second operand 3 states and 567 transitions. [2022-12-13 15:46:03,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 211 flow [2022-12-13 15:46:03,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:46:03,172 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 133 flow [2022-12-13 15:46:03,173 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-13 15:46:03,173 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -12 predicate places. [2022-12-13 15:46:03,173 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 133 flow [2022-12-13 15:46:03,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 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 15:46:03,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:03,174 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:46:03,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:46:03,174 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:03,175 INFO L85 PathProgramCache]: Analyzing trace with hash 746902, now seen corresponding path program 1 times [2022-12-13 15:46:03,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:03,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892096013] [2022-12-13 15:46:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:03,266 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 15:46:03,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:03,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892096013] [2022-12-13 15:46:03,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892096013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:03,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:03,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:03,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304670702] [2022-12-13 15:46:03,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:03,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:03,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:03,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:03,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:03,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 442 [2022-12-13 15:46:03,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 15:46:03,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:03,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 442 [2022-12-13 15:46:03,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:03,406 INFO L130 PetriNetUnfolder]: 244/542 cut-off events. [2022-12-13 15:46:03,406 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-12-13 15:46:03,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 542 events. 244/542 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2800 event pairs, 196 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1189. Up to 433 conditions per place. [2022-12-13 15:46:03,408 INFO L137 encePairwiseOnDemand]: 437/442 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2022-12-13 15:46:03,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 211 flow [2022-12-13 15:46:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2022-12-13 15:46:03,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41855203619909503 [2022-12-13 15:46:03,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2022-12-13 15:46:03,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2022-12-13 15:46:03,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:03,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2022-12-13 15:46:03,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 15:46:03,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:03,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:03,413 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 133 flow. Second operand 3 states and 555 transitions. [2022-12-13 15:46:03,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 211 flow [2022-12-13 15:46:03,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:03,416 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 129 flow [2022-12-13 15:46:03,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2022-12-13 15:46:03,417 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -14 predicate places. [2022-12-13 15:46:03,417 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 129 flow [2022-12-13 15:46:03,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 15:46:03,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:03,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:46:03,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:46:03,418 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:03,418 INFO L85 PathProgramCache]: Analyzing trace with hash 746903, now seen corresponding path program 1 times [2022-12-13 15:46:03,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:03,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766429615] [2022-12-13 15:46:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:03,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:46:03,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:03,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766429615] [2022-12-13 15:46:03,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766429615] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:03,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:03,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:03,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094906177] [2022-12-13 15:46:03,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:03,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:03,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:03,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:03,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:03,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 442 [2022-12-13 15:46:03,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 15:46:03,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:03,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 442 [2022-12-13 15:46:03,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:03,655 INFO L130 PetriNetUnfolder]: 244/527 cut-off events. [2022-12-13 15:46:03,656 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-12-13 15:46:03,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 527 events. 244/527 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2657 event pairs, 228 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 1174. Up to 498 conditions per place. [2022-12-13 15:46:03,658 INFO L137 encePairwiseOnDemand]: 439/442 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-12-13 15:46:03,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 191 flow [2022-12-13 15:46:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-12-13 15:46:03,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42684766214177977 [2022-12-13 15:46:03,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-12-13 15:46:03,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-12-13 15:46:03,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:03,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-12-13 15:46:03,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 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 15:46:03,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:03,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:03,662 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 129 flow. Second operand 3 states and 566 transitions. [2022-12-13 15:46:03,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 191 flow [2022-12-13 15:46:03,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 183 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:03,664 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 119 flow [2022-12-13 15:46:03,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-12-13 15:46:03,664 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -16 predicate places. [2022-12-13 15:46:03,664 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 119 flow [2022-12-13 15:46:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 15:46:03,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:03,665 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:46:03,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:46:03,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:03,665 INFO L85 PathProgramCache]: Analyzing trace with hash 747106, now seen corresponding path program 1 times [2022-12-13 15:46:03,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:03,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745724528] [2022-12-13 15:46:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:03,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:03,749 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 15:46:03,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:03,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745724528] [2022-12-13 15:46:03,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745724528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:03,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:03,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:46:03,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795424445] [2022-12-13 15:46:03,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:03,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:46:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:46:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:46:03,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 442 [2022-12-13 15:46:03,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 168.75) internal successors, (675), 4 states have internal predecessors, (675), 0 states have call successors, (0), 0 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 15:46:03,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:03,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 442 [2022-12-13 15:46:03,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:04,021 INFO L130 PetriNetUnfolder]: 244/525 cut-off events. [2022-12-13 15:46:04,022 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 15:46:04,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 525 events. 244/525 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2601 event pairs, 228 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 1137. Up to 489 conditions per place. [2022-12-13 15:46:04,023 INFO L137 encePairwiseOnDemand]: 436/442 looper letters, 34 selfloop transitions, 4 changer transitions 2/44 dead transitions. [2022-12-13 15:46:04,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 213 flow [2022-12-13 15:46:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2022-12-13 15:46:04,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-13 15:46:04,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2022-12-13 15:46:04,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2022-12-13 15:46:04,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:04,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2022-12-13 15:46:04,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 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 15:46:04,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:04,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:04,027 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 119 flow. Second operand 3 states and 546 transitions. [2022-12-13 15:46:04,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 213 flow [2022-12-13 15:46:04,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:46:04,029 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 134 flow [2022-12-13 15:46:04,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2022-12-13 15:46:04,029 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -14 predicate places. [2022-12-13 15:46:04,029 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 134 flow [2022-12-13 15:46:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.75) internal successors, (675), 4 states have internal predecessors, (675), 0 states have call successors, (0), 0 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 15:46:04,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:04,030 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:46:04,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:46:04,030 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash 747104, now seen corresponding path program 1 times [2022-12-13 15:46:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:04,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879348136] [2022-12-13 15:46:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:04,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:04,064 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 15:46:04,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879348136] [2022-12-13 15:46:04,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879348136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:04,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:04,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:04,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352917079] [2022-12-13 15:46:04,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:04,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:04,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:04,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:04,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:04,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 442 [2022-12-13 15:46:04,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 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 15:46:04,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:04,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 442 [2022-12-13 15:46:04,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:04,211 INFO L130 PetriNetUnfolder]: 212/460 cut-off events. [2022-12-13 15:46:04,211 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-12-13 15:46:04,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 460 events. 212/460 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2277 event pairs, 164 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 1045. Up to 366 conditions per place. [2022-12-13 15:46:04,213 INFO L137 encePairwiseOnDemand]: 437/442 looper letters, 31 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2022-12-13 15:46:04,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 208 flow [2022-12-13 15:46:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-12-13 15:46:04,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42609351432880843 [2022-12-13 15:46:04,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-12-13 15:46:04,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-12-13 15:46:04,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:04,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-12-13 15:46:04,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 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 15:46:04,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:04,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:04,219 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 134 flow. Second operand 3 states and 565 transitions. [2022-12-13 15:46:04,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 208 flow [2022-12-13 15:46:04,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:04,221 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 130 flow [2022-12-13 15:46:04,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2022-12-13 15:46:04,221 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -16 predicate places. [2022-12-13 15:46:04,221 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 130 flow [2022-12-13 15:46:04,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 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 15:46:04,222 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:04,222 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:46:04,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:46:04,222 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:04,222 INFO L85 PathProgramCache]: Analyzing trace with hash 717983657, now seen corresponding path program 1 times [2022-12-13 15:46:04,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:04,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544946889] [2022-12-13 15:46:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:04,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:04,257 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 15:46:04,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:04,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544946889] [2022-12-13 15:46:04,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544946889] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:04,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:04,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625959652] [2022-12-13 15:46:04,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:04,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:04,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:04,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 442 [2022-12-13 15:46:04,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 15:46:04,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:04,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 442 [2022-12-13 15:46:04,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:04,390 INFO L130 PetriNetUnfolder]: 192/438 cut-off events. [2022-12-13 15:46:04,390 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-12-13 15:46:04,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 438 events. 192/438 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2169 event pairs, 44 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 1043. Up to 313 conditions per place. [2022-12-13 15:46:04,392 INFO L137 encePairwiseOnDemand]: 439/442 looper letters, 50 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2022-12-13 15:46:04,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 305 flow [2022-12-13 15:46:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2022-12-13 15:46:04,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4517345399698341 [2022-12-13 15:46:04,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2022-12-13 15:46:04,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2022-12-13 15:46:04,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:04,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2022-12-13 15:46:04,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:04,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:04,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:04,401 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 130 flow. Second operand 3 states and 599 transitions. [2022-12-13 15:46:04,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 305 flow [2022-12-13 15:46:04,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:04,403 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 130 flow [2022-12-13 15:46:04,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2022-12-13 15:46:04,403 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -15 predicate places. [2022-12-13 15:46:04,403 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 130 flow [2022-12-13 15:46:04,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 15:46:04,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:04,404 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:46:04,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:46:04,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash 718010788, now seen corresponding path program 1 times [2022-12-13 15:46:04,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:04,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374045809] [2022-12-13 15:46:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:04,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:04,517 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 15:46:04,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:04,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374045809] [2022-12-13 15:46:04,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374045809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:04,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:04,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:04,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780883099] [2022-12-13 15:46:04,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:04,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:04,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:04,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:04,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 442 [2022-12-13 15:46:04,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 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 15:46:04,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:04,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 442 [2022-12-13 15:46:04,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:04,691 INFO L130 PetriNetUnfolder]: 176/414 cut-off events. [2022-12-13 15:46:04,691 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-12-13 15:46:04,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 414 events. 176/414 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2005 event pairs, 148 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 1041. Up to 354 conditions per place. [2022-12-13 15:46:04,693 INFO L137 encePairwiseOnDemand]: 439/442 looper letters, 30 selfloop transitions, 2 changer transitions 1/37 dead transitions. [2022-12-13 15:46:04,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 200 flow [2022-12-13 15:46:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-12-13 15:46:04,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2022-12-13 15:46:04,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-12-13 15:46:04,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-12-13 15:46:04,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:04,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-12-13 15:46:04,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 15:46:04,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:04,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 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 15:46:04,697 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 130 flow. Second operand 3 states and 572 transitions. [2022-12-13 15:46:04,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 200 flow [2022-12-13 15:46:04,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:04,699 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 121 flow [2022-12-13 15:46:04,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2022-12-13 15:46:04,699 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -16 predicate places. [2022-12-13 15:46:04,699 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 121 flow [2022-12-13 15:46:04,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 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 15:46:04,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:04,700 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:46:04,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 15:46:04,700 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash 718005476, now seen corresponding path program 1 times [2022-12-13 15:46:04,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:04,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704494653] [2022-12-13 15:46:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:04,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:04,900 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 15:46:04,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704494653] [2022-12-13 15:46:04,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704494653] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:46:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788131372] [2022-12-13 15:46:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:04,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:04,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:04,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:04,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:46:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:46:04,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:46:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:46:05,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-13 15:46:05,083 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-13 15:46:05,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 15:46:05,123 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 27 treesize of output 27 [2022-12-13 15:46:05,170 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 15:46:05,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:46:05,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788131372] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:05,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:46:05,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-12-13 15:46:05,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289039923] [2022-12-13 15:46:05,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:05,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:46:05,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:46:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:46:05,364 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 442 [2022-12-13 15:46:05,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 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 15:46:05,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:05,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 442 [2022-12-13 15:46:05,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:05,518 INFO L130 PetriNetUnfolder]: 186/448 cut-off events. [2022-12-13 15:46:05,518 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-12-13 15:46:05,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 448 events. 186/448 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2076 event pairs, 93 based on Foata normal form. 4/429 useless extension candidates. Maximal degree in co-relation 1105. Up to 355 conditions per place. [2022-12-13 15:46:05,520 INFO L137 encePairwiseOnDemand]: 432/442 looper letters, 38 selfloop transitions, 8 changer transitions 4/54 dead transitions. [2022-12-13 15:46:05,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 285 flow [2022-12-13 15:46:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:46:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:46:05,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 728 transitions. [2022-12-13 15:46:05,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-13 15:46:05,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 728 transitions. [2022-12-13 15:46:05,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 728 transitions. [2022-12-13 15:46:05,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:05,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 728 transitions. [2022-12-13 15:46:05,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:05,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 442.0) internal successors, (2210), 5 states have internal predecessors, (2210), 0 states have call successors, (0), 0 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 15:46:05,529 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 442.0) internal successors, (2210), 5 states have internal predecessors, (2210), 0 states have call successors, (0), 0 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 15:46:05,529 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 121 flow. Second operand 4 states and 728 transitions. [2022-12-13 15:46:05,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 285 flow [2022-12-13 15:46:05,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:05,532 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 172 flow [2022-12-13 15:46:05,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2022-12-13 15:46:05,532 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -14 predicate places. [2022-12-13 15:46:05,533 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 172 flow [2022-12-13 15:46:05,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 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 15:46:05,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:05,533 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:46:05,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:46:05,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:05,735 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:05,736 INFO L85 PathProgramCache]: Analyzing trace with hash 782659776, now seen corresponding path program 1 times [2022-12-13 15:46:05,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:05,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399293731] [2022-12-13 15:46:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:05,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:06,081 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 15:46:06,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:06,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399293731] [2022-12-13 15:46:06,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399293731] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:46:06,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587913398] [2022-12-13 15:46:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:06,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:06,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:06,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:06,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:46:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:06,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 15:46:06,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:46:06,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:46:06,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 15:46:06,209 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-13 15:46:06,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 15:46:06,296 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 27 treesize of output 27 [2022-12-13 15:46:06,400 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 15:46:06,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:46:06,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587913398] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:06,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:46:06,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2022-12-13 15:46:06,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799172769] [2022-12-13 15:46:06,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:06,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:46:06,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:46:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:46:06,808 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 442 [2022-12-13 15:46:06,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 15:46:06,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:06,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 442 [2022-12-13 15:46:06,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:07,053 INFO L130 PetriNetUnfolder]: 179/440 cut-off events. [2022-12-13 15:46:07,053 INFO L131 PetriNetUnfolder]: For 225/225 co-relation queries the response was YES. [2022-12-13 15:46:07,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1217 conditions, 440 events. 179/440 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2085 event pairs, 167 based on Foata normal form. 6/446 useless extension candidates. Maximal degree in co-relation 1206. Up to 371 conditions per place. [2022-12-13 15:46:07,056 INFO L137 encePairwiseOnDemand]: 430/442 looper letters, 38 selfloop transitions, 7 changer transitions 13/62 dead transitions. [2022-12-13 15:46:07,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 385 flow [2022-12-13 15:46:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:46:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:46:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1047 transitions. [2022-12-13 15:46:07,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3947963800904977 [2022-12-13 15:46:07,059 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1047 transitions. [2022-12-13 15:46:07,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1047 transitions. [2022-12-13 15:46:07,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:07,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1047 transitions. [2022-12-13 15:46:07,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.5) internal successors, (1047), 6 states have internal predecessors, (1047), 0 states have call successors, (0), 0 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 15:46:07,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 442.0) internal successors, (3094), 7 states have internal predecessors, (3094), 0 states have call successors, (0), 0 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 15:46:07,066 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 442.0) internal successors, (3094), 7 states have internal predecessors, (3094), 0 states have call successors, (0), 0 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 15:46:07,066 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 172 flow. Second operand 6 states and 1047 transitions. [2022-12-13 15:46:07,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 385 flow [2022-12-13 15:46:07,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:46:07,070 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 234 flow [2022-12-13 15:46:07,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2022-12-13 15:46:07,071 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2022-12-13 15:46:07,071 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 234 flow [2022-12-13 15:46:07,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 15:46:07,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:07,072 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:46:07,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:46:07,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:07,272 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash 783333716, now seen corresponding path program 1 times [2022-12-13 15:46:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373698020] [2022-12-13 15:46:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:07,443 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 15:46:07,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:07,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373698020] [2022-12-13 15:46:07,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373698020] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:46:07,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913785053] [2022-12-13 15:46:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:07,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:07,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:07,445 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:07,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:46:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:07,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 15:46:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:46:07,557 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:46:07,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-12-13 15:46:07,569 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:46:07,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 15:46:07,593 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 27 treesize of output 27 [2022-12-13 15:46:07,647 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 15:46:07,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:46:07,721 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 15:46:07,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913785053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:46:07,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:46:07,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-13 15:46:07,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262036135] [2022-12-13 15:46:07,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:46:07,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:46:07,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:07,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:46:07,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=71, Unknown=1, NotChecked=0, Total=110 [2022-12-13 15:46:08,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 442 [2022-12-13 15:46:08,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 234 flow. Second operand has 11 states, 11 states have (on average 107.63636363636364) internal successors, (1184), 11 states have internal predecessors, (1184), 0 states have call successors, (0), 0 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 15:46:08,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:08,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 442 [2022-12-13 15:46:08,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:08,735 INFO L130 PetriNetUnfolder]: 174/418 cut-off events. [2022-12-13 15:46:08,735 INFO L131 PetriNetUnfolder]: For 391/391 co-relation queries the response was YES. [2022-12-13 15:46:08,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 418 events. 174/418 cut-off events. For 391/391 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1871 event pairs, 49 based on Foata normal form. 23/441 useless extension candidates. Maximal degree in co-relation 1351. Up to 179 conditions per place. [2022-12-13 15:46:08,737 INFO L137 encePairwiseOnDemand]: 429/442 looper letters, 36 selfloop transitions, 18 changer transitions 11/69 dead transitions. [2022-12-13 15:46:08,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 482 flow [2022-12-13 15:46:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:46:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:46:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 806 transitions. [2022-12-13 15:46:08,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2605042016806723 [2022-12-13 15:46:08,739 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 806 transitions. [2022-12-13 15:46:08,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 806 transitions. [2022-12-13 15:46:08,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:08,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 806 transitions. [2022-12-13 15:46:08,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.14285714285714) internal successors, (806), 7 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:08,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 442.0) internal successors, (3536), 8 states have internal predecessors, (3536), 0 states have call successors, (0), 0 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 15:46:08,743 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 442.0) internal successors, (3536), 8 states have internal predecessors, (3536), 0 states have call successors, (0), 0 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 15:46:08,743 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 234 flow. Second operand 7 states and 806 transitions. [2022-12-13 15:46:08,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 482 flow [2022-12-13 15:46:08,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 463 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:08,746 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 312 flow [2022-12-13 15:46:08,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=312, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2022-12-13 15:46:08,746 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 1 predicate places. [2022-12-13 15:46:08,746 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 312 flow [2022-12-13 15:46:08,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 107.63636363636364) internal successors, (1184), 11 states have internal predecessors, (1184), 0 states have call successors, (0), 0 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 15:46:08,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:08,747 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 15:46:08,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:46:08,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 15:46:08,948 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:46:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash 783333730, now seen corresponding path program 1 times [2022-12-13 15:46:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:08,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090877811] [2022-12-13 15:46:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:08,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:46:09,004 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:46:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:46:09,031 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:46:09,031 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:46:09,032 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-12-13 15:46:09,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (31 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2022-12-13 15:46:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2022-12-13 15:46:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2022-12-13 15:46:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2022-12-13 15:46:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2022-12-13 15:46:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2022-12-13 15:46:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2022-12-13 15:46:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2022-12-13 15:46:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2022-12-13 15:46:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2022-12-13 15:46:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK (2 of 33 remaining) [2022-12-13 15:46:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 33 remaining) [2022-12-13 15:46:09,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 33 remaining) [2022-12-13 15:46:09,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 15:46:09,037 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:09,039 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:46:09,039 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 15:46:09,057 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-12-13 15:46:09,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 224 transitions, 496 flow [2022-12-13 15:46:09,146 INFO L130 PetriNetUnfolder]: 149/1324 cut-off events. [2022-12-13 15:46:09,146 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-13 15:46:09,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 1324 events. 149/1324 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7722 event pairs, 1 based on Foata normal form. 0/978 useless extension candidates. Maximal degree in co-relation 772. Up to 32 conditions per place. [2022-12-13 15:46:09,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 224 transitions, 496 flow [2022-12-13 15:46:09,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 224 transitions, 496 flow [2022-12-13 15:46:09,153 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:46:09,153 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 224 transitions, 496 flow [2022-12-13 15:46:09,153 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 224 transitions, 496 flow [2022-12-13 15:46:09,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 224 transitions, 496 flow [2022-12-13 15:46:09,240 INFO L130 PetriNetUnfolder]: 149/1324 cut-off events. [2022-12-13 15:46:09,240 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-13 15:46:09,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 1324 events. 149/1324 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7722 event pairs, 1 based on Foata normal form. 0/978 useless extension candidates. Maximal degree in co-relation 772. Up to 32 conditions per place. [2022-12-13 15:46:09,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 6052 [2022-12-13 15:46:22,348 INFO L134 LiptonReduction]: Checked pairs total: 13164 [2022-12-13 15:46:22,348 INFO L136 LiptonReduction]: Total number of compositions: 259 [2022-12-13 15:46:22,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:46:22,350 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@580a0541, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:46:22,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-13 15:46:22,350 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 15:46:22,350 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:46:22,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:22,351 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 15:46:22,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:22,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1249, now seen corresponding path program 1 times [2022-12-13 15:46:22,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:22,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379872622] [2022-12-13 15:46:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:22,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:22,356 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 15:46:22,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379872622] [2022-12-13 15:46:22,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379872622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:22,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:22,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 15:46:22,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369363284] [2022-12-13 15:46:22,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:22,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:46:22,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:22,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:46:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:46:22,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 483 [2022-12-13 15:46:22,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 198.5) internal successors, (397), 2 states have internal predecessors, (397), 0 states have call successors, (0), 0 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 15:46:22,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:22,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 483 [2022-12-13 15:46:22,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:23,220 INFO L130 PetriNetUnfolder]: 7901/12655 cut-off events. [2022-12-13 15:46:23,220 INFO L131 PetriNetUnfolder]: For 1006/1006 co-relation queries the response was YES. [2022-12-13 15:46:23,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25082 conditions, 12655 events. 7901/12655 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 79810 event pairs, 7485 based on Foata normal form. 0/8151 useless extension candidates. Maximal degree in co-relation 7783. Up to 11708 conditions per place. [2022-12-13 15:46:23,275 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 42 selfloop transitions, 0 changer transitions 0/56 dead transitions. [2022-12-13 15:46:23,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 244 flow [2022-12-13 15:46:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:46:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 15:46:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 450 transitions. [2022-12-13 15:46:23,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4658385093167702 [2022-12-13 15:46:23,277 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 450 transitions. [2022-12-13 15:46:23,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 450 transitions. [2022-12-13 15:46:23,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:23,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 450 transitions. [2022-12-13 15:46:23,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 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 15:46:23,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 483.0) internal successors, (1449), 3 states have internal predecessors, (1449), 0 states have call successors, (0), 0 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 15:46:23,281 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 483.0) internal successors, (1449), 3 states have internal predecessors, (1449), 0 states have call successors, (0), 0 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 15:46:23,281 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 184 flow. Second operand 2 states and 450 transitions. [2022-12-13 15:46:23,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 244 flow [2022-12-13 15:46:23,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:46:23,284 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 160 flow [2022-12-13 15:46:23,284 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=160, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2022-12-13 15:46:23,284 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -11 predicate places. [2022-12-13 15:46:23,284 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 160 flow [2022-12-13 15:46:23,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 198.5) internal successors, (397), 2 states have internal predecessors, (397), 0 states have call successors, (0), 0 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 15:46:23,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:23,285 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:46:23,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 15:46:23,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:23,286 INFO L85 PathProgramCache]: Analyzing trace with hash 39806, now seen corresponding path program 1 times [2022-12-13 15:46:23,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:23,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230650613] [2022-12-13 15:46:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:23,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:23,384 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 15:46:23,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:23,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230650613] [2022-12-13 15:46:23,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230650613] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:23,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:23,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:23,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730232179] [2022-12-13 15:46:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:23,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:23,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:23,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:23,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:23,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2022-12-13 15:46:23,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 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 15:46:23,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:23,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2022-12-13 15:46:23,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:24,344 INFO L130 PetriNetUnfolder]: 7901/12532 cut-off events. [2022-12-13 15:46:24,344 INFO L131 PetriNetUnfolder]: For 1006/1006 co-relation queries the response was YES. [2022-12-13 15:46:24,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24960 conditions, 12532 events. 7901/12532 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 78439 event pairs, 6461 based on Foata normal form. 0/8151 useless extension candidates. Maximal degree in co-relation 24953. Up to 10171 conditions per place. [2022-12-13 15:46:24,380 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 47 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2022-12-13 15:46:24,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 272 flow [2022-12-13 15:46:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2022-12-13 15:46:24,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4189095928226363 [2022-12-13 15:46:24,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2022-12-13 15:46:24,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2022-12-13 15:46:24,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:24,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2022-12-13 15:46:24,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:24,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:24,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:24,384 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 160 flow. Second operand 3 states and 607 transitions. [2022-12-13 15:46:24,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 272 flow [2022-12-13 15:46:24,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:46:24,386 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 162 flow [2022-12-13 15:46:24,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2022-12-13 15:46:24,386 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -11 predicate places. [2022-12-13 15:46:24,387 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 162 flow [2022-12-13 15:46:24,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 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 15:46:24,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:24,387 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:46:24,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 15:46:24,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:24,387 INFO L85 PathProgramCache]: Analyzing trace with hash 39807, now seen corresponding path program 1 times [2022-12-13 15:46:24,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:24,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45902082] [2022-12-13 15:46:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:24,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:24,456 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 15:46:24,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:24,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45902082] [2022-12-13 15:46:24,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45902082] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:24,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:24,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:24,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156515582] [2022-12-13 15:46:24,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:24,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:24,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:24,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:24,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:24,526 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 483 [2022-12-13 15:46:24,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 15:46:24,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:24,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 483 [2022-12-13 15:46:24,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:25,371 INFO L130 PetriNetUnfolder]: 7901/12409 cut-off events. [2022-12-13 15:46:25,371 INFO L131 PetriNetUnfolder]: For 1144/1144 co-relation queries the response was YES. [2022-12-13 15:46:25,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25351 conditions, 12409 events. 7901/12409 cut-off events. For 1144/1144 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 76066 event pairs, 7485 based on Foata normal form. 0/8284 useless extension candidates. Maximal degree in co-relation 25343. Up to 11707 conditions per place. [2022-12-13 15:46:25,426 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 41 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2022-12-13 15:46:25,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 242 flow [2022-12-13 15:46:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2022-12-13 15:46:25,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42374051069703245 [2022-12-13 15:46:25,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2022-12-13 15:46:25,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2022-12-13 15:46:25,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:25,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2022-12-13 15:46:25,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 15:46:25,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:25,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:25,432 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 162 flow. Second operand 3 states and 614 transitions. [2022-12-13 15:46:25,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 242 flow [2022-12-13 15:46:25,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:25,444 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 154 flow [2022-12-13 15:46:25,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2022-12-13 15:46:25,445 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -13 predicate places. [2022-12-13 15:46:25,445 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 154 flow [2022-12-13 15:46:25,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 15:46:25,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:25,445 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:46:25,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 15:46:25,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash 40186, now seen corresponding path program 1 times [2022-12-13 15:46:25,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:25,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364727254] [2022-12-13 15:46:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:25,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:25,538 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 15:46:25,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:25,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364727254] [2022-12-13 15:46:25,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364727254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:25,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:25,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967104416] [2022-12-13 15:46:25,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:25,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:25,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:25,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 483 [2022-12-13 15:46:25,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 15:46:25,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:25,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 483 [2022-12-13 15:46:25,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:26,597 INFO L130 PetriNetUnfolder]: 7902/12464 cut-off events. [2022-12-13 15:46:26,597 INFO L131 PetriNetUnfolder]: For 858/858 co-relation queries the response was YES. [2022-12-13 15:46:26,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24901 conditions, 12464 events. 7902/12464 cut-off events. For 858/858 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 75273 event pairs, 7485 based on Foata normal form. 0/8052 useless extension candidates. Maximal degree in co-relation 24893. Up to 11703 conditions per place. [2022-12-13 15:46:26,638 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 50 selfloop transitions, 4 changer transitions 3/67 dead transitions. [2022-12-13 15:46:26,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 298 flow [2022-12-13 15:46:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2022-12-13 15:46:26,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42167011732229126 [2022-12-13 15:46:26,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2022-12-13 15:46:26,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2022-12-13 15:46:26,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:26,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2022-12-13 15:46:26,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 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 15:46:26,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:26,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:26,642 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 154 flow. Second operand 3 states and 611 transitions. [2022-12-13 15:46:26,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 298 flow [2022-12-13 15:46:26,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:46:26,647 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 183 flow [2022-12-13 15:46:26,647 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2022-12-13 15:46:26,647 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -11 predicate places. [2022-12-13 15:46:26,647 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 183 flow [2022-12-13 15:46:26,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 15:46:26,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:26,647 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:46:26,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 15:46:26,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash 40187, now seen corresponding path program 1 times [2022-12-13 15:46:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:26,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19482941] [2022-12-13 15:46:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:26,674 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 15:46:26,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:26,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19482941] [2022-12-13 15:46:26,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19482941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:26,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:26,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:26,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856308719] [2022-12-13 15:46:26,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:26,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:26,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:26,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2022-12-13 15:46:26,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 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 15:46:26,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:26,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2022-12-13 15:46:26,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:27,534 INFO L130 PetriNetUnfolder]: 7375/11631 cut-off events. [2022-12-13 15:46:27,534 INFO L131 PetriNetUnfolder]: For 1392/1392 co-relation queries the response was YES. [2022-12-13 15:46:27,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24239 conditions, 11631 events. 7375/11631 cut-off events. For 1392/1392 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 71038 event pairs, 5935 based on Foata normal form. 0/8331 useless extension candidates. Maximal degree in co-relation 24230. Up to 9380 conditions per place. [2022-12-13 15:46:27,573 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 47 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2022-12-13 15:46:27,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 297 flow [2022-12-13 15:46:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2022-12-13 15:46:27,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42581090407177363 [2022-12-13 15:46:27,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2022-12-13 15:46:27,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2022-12-13 15:46:27,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:27,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2022-12-13 15:46:27,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 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 15:46:27,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:27,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:27,577 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 183 flow. Second operand 3 states and 617 transitions. [2022-12-13 15:46:27,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 297 flow [2022-12-13 15:46:27,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:46:27,580 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 183 flow [2022-12-13 15:46:27,580 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2022-12-13 15:46:27,581 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -12 predicate places. [2022-12-13 15:46:27,581 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 183 flow [2022-12-13 15:46:27,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 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 15:46:27,581 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:27,581 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:46:27,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 15:46:27,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:27,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1245718, now seen corresponding path program 1 times [2022-12-13 15:46:27,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:27,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038654259] [2022-12-13 15:46:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:27,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:27,662 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 15:46:27,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:27,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038654259] [2022-12-13 15:46:27,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038654259] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:27,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:27,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:46:27,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007791785] [2022-12-13 15:46:27,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:27,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:46:27,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:46:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:46:27,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2022-12-13 15:46:27,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 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 15:46:27,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:27,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2022-12-13 15:46:27,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:28,493 INFO L130 PetriNetUnfolder]: 7375/11477 cut-off events. [2022-12-13 15:46:28,493 INFO L131 PetriNetUnfolder]: For 1785/1785 co-relation queries the response was YES. [2022-12-13 15:46:28,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24596 conditions, 11477 events. 7375/11477 cut-off events. For 1785/1785 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 68542 event pairs, 5935 based on Foata normal form. 0/8331 useless extension candidates. Maximal degree in co-relation 24587. Up to 9380 conditions per place. [2022-12-13 15:46:28,536 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 47 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2022-12-13 15:46:28,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 297 flow [2022-12-13 15:46:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2022-12-13 15:46:28,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2022-12-13 15:46:28,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2022-12-13 15:46:28,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2022-12-13 15:46:28,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:28,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2022-12-13 15:46:28,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 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 15:46:28,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:28,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:28,540 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 183 flow. Second operand 3 states and 575 transitions. [2022-12-13 15:46:28,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 297 flow [2022-12-13 15:46:28,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:28,555 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 179 flow [2022-12-13 15:46:28,555 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2022-12-13 15:46:28,555 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -14 predicate places. [2022-12-13 15:46:28,555 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 179 flow [2022-12-13 15:46:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 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 15:46:28,556 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:28,556 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:46:28,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 15:46:28,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:28,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1245719, now seen corresponding path program 1 times [2022-12-13 15:46:28,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:28,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463824600] [2022-12-13 15:46:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:28,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:28,647 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 15:46:28,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:28,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463824600] [2022-12-13 15:46:28,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463824600] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:28,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:28,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:28,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560465708] [2022-12-13 15:46:28,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:28,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:28,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:28,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:28,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2022-12-13 15:46:28,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:28,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:28,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2022-12-13 15:46:28,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:29,710 INFO L130 PetriNetUnfolder]: 7375/11323 cut-off events. [2022-12-13 15:46:29,710 INFO L131 PetriNetUnfolder]: For 1785/1785 co-relation queries the response was YES. [2022-12-13 15:46:29,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24442 conditions, 11323 events. 7375/11323 cut-off events. For 1785/1785 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 65908 event pairs, 6959 based on Foata normal form. 0/8177 useless extension candidates. Maximal degree in co-relation 24433. Up to 10917 conditions per place. [2022-12-13 15:46:29,758 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 42 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2022-12-13 15:46:29,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 261 flow [2022-12-13 15:46:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2022-12-13 15:46:29,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41200828157349895 [2022-12-13 15:46:29,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2022-12-13 15:46:29,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2022-12-13 15:46:29,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:29,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2022-12-13 15:46:29,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 15:46:29,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:29,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:29,764 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 179 flow. Second operand 3 states and 597 transitions. [2022-12-13 15:46:29,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 261 flow [2022-12-13 15:46:29,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:29,781 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 169 flow [2022-12-13 15:46:29,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2022-12-13 15:46:29,782 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -16 predicate places. [2022-12-13 15:46:29,782 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 169 flow [2022-12-13 15:46:29,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:29,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:29,782 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:46:29,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 15:46:29,783 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:29,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1245953, now seen corresponding path program 1 times [2022-12-13 15:46:29,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:29,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619631797] [2022-12-13 15:46:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:29,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:29,865 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 15:46:29,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:29,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619631797] [2022-12-13 15:46:29,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619631797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:29,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:29,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:46:29,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603757438] [2022-12-13 15:46:29,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:29,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:46:29,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:46:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:46:30,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 483 [2022-12-13 15:46:30,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 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 15:46:30,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:30,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 483 [2022-12-13 15:46:30,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:31,011 INFO L130 PetriNetUnfolder]: 7375/11321 cut-off events. [2022-12-13 15:46:31,011 INFO L131 PetriNetUnfolder]: For 1316/1316 co-relation queries the response was YES. [2022-12-13 15:46:31,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23925 conditions, 11321 events. 7375/11321 cut-off events. For 1316/1316 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 64933 event pairs, 6959 based on Foata normal form. 0/8177 useless extension candidates. Maximal degree in co-relation 23916. Up to 10908 conditions per place. [2022-12-13 15:46:31,050 INFO L137 encePairwiseOnDemand]: 477/483 looper letters, 44 selfloop transitions, 4 changer transitions 2/56 dead transitions. [2022-12-13 15:46:31,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 283 flow [2022-12-13 15:46:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2022-12-13 15:46:31,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4085576259489303 [2022-12-13 15:46:31,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2022-12-13 15:46:31,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2022-12-13 15:46:31,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:31,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2022-12-13 15:46:31,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 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 15:46:31,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:31,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:31,055 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 169 flow. Second operand 3 states and 592 transitions. [2022-12-13 15:46:31,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 283 flow [2022-12-13 15:46:31,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:46:31,059 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 184 flow [2022-12-13 15:46:31,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2022-12-13 15:46:31,060 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -14 predicate places. [2022-12-13 15:46:31,060 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 184 flow [2022-12-13 15:46:31,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 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 15:46:31,060 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:31,060 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:46:31,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 15:46:31,060 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1245952, now seen corresponding path program 1 times [2022-12-13 15:46:31,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:31,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868094794] [2022-12-13 15:46:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:31,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:31,090 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 15:46:31,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:31,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868094794] [2022-12-13 15:46:31,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868094794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:31,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:31,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122346751] [2022-12-13 15:46:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:31,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:31,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:31,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2022-12-13 15:46:31,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:31,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:31,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2022-12-13 15:46:31,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:31,799 INFO L130 PetriNetUnfolder]: 6499/10019 cut-off events. [2022-12-13 15:46:31,800 INFO L131 PetriNetUnfolder]: For 1666/1666 co-relation queries the response was YES. [2022-12-13 15:46:31,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21753 conditions, 10019 events. 6499/10019 cut-off events. For 1666/1666 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 57807 event pairs, 5059 based on Foata normal form. 0/7944 useless extension candidates. Maximal degree in co-relation 21743. Up to 8076 conditions per place. [2022-12-13 15:46:31,833 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 45 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2022-12-13 15:46:31,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 294 flow [2022-12-13 15:46:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2022-12-13 15:46:31,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4244306418219462 [2022-12-13 15:46:31,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2022-12-13 15:46:31,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2022-12-13 15:46:31,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:31,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2022-12-13 15:46:31,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 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 15:46:31,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:31,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:31,842 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 184 flow. Second operand 3 states and 615 transitions. [2022-12-13 15:46:31,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 294 flow [2022-12-13 15:46:31,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:31,848 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 180 flow [2022-12-13 15:46:31,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-12-13 15:46:31,849 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -16 predicate places. [2022-12-13 15:46:31,849 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 180 flow [2022-12-13 15:46:31,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:31,849 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:31,849 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:46:31,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 15:46:31,850 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1197415436, now seen corresponding path program 1 times [2022-12-13 15:46:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:31,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353750967] [2022-12-13 15:46:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:31,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:31,918 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 15:46:31,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:31,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353750967] [2022-12-13 15:46:31,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353750967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:31,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:31,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:31,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025562707] [2022-12-13 15:46:31,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:31,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:31,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:31,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:31,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:31,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2022-12-13 15:46:31,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 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 15:46:31,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:31,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2022-12-13 15:46:31,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:32,574 INFO L130 PetriNetUnfolder]: 5986/9268 cut-off events. [2022-12-13 15:46:32,574 INFO L131 PetriNetUnfolder]: For 2021/2021 co-relation queries the response was YES. [2022-12-13 15:46:32,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20246 conditions, 9268 events. 5986/9268 cut-off events. For 2021/2021 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 52950 event pairs, 5059 based on Foata normal form. 1/7578 useless extension candidates. Maximal degree in co-relation 20236. Up to 8076 conditions per place. [2022-12-13 15:46:32,606 INFO L137 encePairwiseOnDemand]: 480/483 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2022-12-13 15:46:32,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 277 flow [2022-12-13 15:46:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2022-12-13 15:46:32,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42926155969634233 [2022-12-13 15:46:32,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2022-12-13 15:46:32,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2022-12-13 15:46:32,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:32,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2022-12-13 15:46:32,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 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 15:46:32,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:32,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:32,610 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 180 flow. Second operand 3 states and 622 transitions. [2022-12-13 15:46:32,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 277 flow [2022-12-13 15:46:32,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 273 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:32,640 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 167 flow [2022-12-13 15:46:32,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2022-12-13 15:46:32,641 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -17 predicate places. [2022-12-13 15:46:32,641 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 167 flow [2022-12-13 15:46:32,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 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 15:46:32,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:32,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:46:32,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 15:46:32,641 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:32,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1197392745, now seen corresponding path program 1 times [2022-12-13 15:46:32,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:32,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243674177] [2022-12-13 15:46:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:32,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:32,684 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 15:46:32,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:32,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243674177] [2022-12-13 15:46:32,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243674177] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:32,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:32,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:46:32,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107106676] [2022-12-13 15:46:32,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:32,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:46:32,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:46:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:46:32,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2022-12-13 15:46:32,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 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 15:46:32,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:32,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2022-12-13 15:46:32,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:33,293 INFO L130 PetriNetUnfolder]: 5797/8888 cut-off events. [2022-12-13 15:46:33,294 INFO L131 PetriNetUnfolder]: For 2579/2579 co-relation queries the response was YES. [2022-12-13 15:46:33,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19665 conditions, 8888 events. 5797/8888 cut-off events. For 2579/2579 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 50461 event pairs, 1890 based on Foata normal form. 0/7331 useless extension candidates. Maximal degree in co-relation 19655. Up to 8146 conditions per place. [2022-12-13 15:46:33,316 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 63 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2022-12-13 15:46:33,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 72 transitions, 394 flow [2022-12-13 15:46:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:46:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:46:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2022-12-13 15:46:33,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44306418219461696 [2022-12-13 15:46:33,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2022-12-13 15:46:33,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2022-12-13 15:46:33,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:33,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2022-12-13 15:46:33,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 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 15:46:33,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:33,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 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 15:46:33,320 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 167 flow. Second operand 3 states and 642 transitions. [2022-12-13 15:46:33,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 72 transitions, 394 flow [2022-12-13 15:46:33,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:46:33,327 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 184 flow [2022-12-13 15:46:33,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-12-13 15:46:33,327 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -16 predicate places. [2022-12-13 15:46:33,327 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 184 flow [2022-12-13 15:46:33,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 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 15:46:33,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:33,328 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:46:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 15:46:33,328 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1513615698, now seen corresponding path program 1 times [2022-12-13 15:46:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:33,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944442117] [2022-12-13 15:46:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:33,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:33,477 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 15:46:33,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:33,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944442117] [2022-12-13 15:46:33,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944442117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:46:33,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:46:33,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:46:33,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113218718] [2022-12-13 15:46:33,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:46:33,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:46:33,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:33,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:46:33,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:46:33,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 483 [2022-12-13 15:46:33,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 15:46:33,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:33,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 483 [2022-12-13 15:46:33,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:34,384 INFO L130 PetriNetUnfolder]: 5909/9336 cut-off events. [2022-12-13 15:46:34,384 INFO L131 PetriNetUnfolder]: For 3614/3614 co-relation queries the response was YES. [2022-12-13 15:46:34,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23132 conditions, 9336 events. 5909/9336 cut-off events. For 3614/3614 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 55351 event pairs, 2723 based on Foata normal form. 19/9054 useless extension candidates. Maximal degree in co-relation 23121. Up to 8534 conditions per place. [2022-12-13 15:46:34,419 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 69 selfloop transitions, 8 changer transitions 2/85 dead transitions. [2022-12-13 15:46:34,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 85 transitions, 472 flow [2022-12-13 15:46:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:46:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:46:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 791 transitions. [2022-12-13 15:46:34,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40942028985507245 [2022-12-13 15:46:34,421 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 791 transitions. [2022-12-13 15:46:34,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 791 transitions. [2022-12-13 15:46:34,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:34,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 791 transitions. [2022-12-13 15:46:34,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:34,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 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 15:46:34,424 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 483.0) internal successors, (2415), 5 states have internal predecessors, (2415), 0 states have call successors, (0), 0 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 15:46:34,424 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 184 flow. Second operand 4 states and 791 transitions. [2022-12-13 15:46:34,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 85 transitions, 472 flow [2022-12-13 15:46:34,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 85 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:46:34,429 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 240 flow [2022-12-13 15:46:34,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2022-12-13 15:46:34,429 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -13 predicate places. [2022-12-13 15:46:34,429 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 240 flow [2022-12-13 15:46:34,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 15:46:34,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:34,429 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 15:46:34,430 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash 322553805, now seen corresponding path program 1 times [2022-12-13 15:46:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:34,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725498603] [2022-12-13 15:46:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:34,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:34,650 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 15:46:34,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:34,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725498603] [2022-12-13 15:46:34,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725498603] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:46:34,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882073047] [2022-12-13 15:46:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:34,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:34,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:34,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:34,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:46:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:34,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 15:46:34,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:46:35,221 INFO L321 Elim1Store]: treesize reduction 382, result has 21.2 percent of original size [2022-12-13 15:46:35,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 410 treesize of output 466 [2022-12-13 15:46:35,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-12-13 15:46:35,377 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 5 treesize of output 3 [2022-12-13 15:46:35,533 INFO L321 Elim1Store]: treesize reduction 48, result has 46.1 percent of original size [2022-12-13 15:46:35,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 55 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 61 treesize of output 77 [2022-12-13 15:46:35,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2022-12-13 15:46:36,440 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 15:46:36,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:46:36,573 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 15:46:36,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882073047] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:46:36,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:46:36,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2022-12-13 15:46:36,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46772006] [2022-12-13 15:46:36,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:46:36,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:46:36,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:36,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:46:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=92, Unknown=1, NotChecked=0, Total=132 [2022-12-13 15:46:36,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 483 [2022-12-13 15:46:36,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 240 flow. Second operand has 12 states, 12 states have (on average 113.5) internal successors, (1362), 12 states have internal predecessors, (1362), 0 states have call successors, (0), 0 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 15:46:36,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:36,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 483 [2022-12-13 15:46:36,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:38,047 INFO L130 PetriNetUnfolder]: 5850/9271 cut-off events. [2022-12-13 15:46:38,048 INFO L131 PetriNetUnfolder]: For 4693/4693 co-relation queries the response was YES. [2022-12-13 15:46:38,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24555 conditions, 9271 events. 5850/9271 cut-off events. For 4693/4693 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 56216 event pairs, 471 based on Foata normal form. 36/9293 useless extension candidates. Maximal degree in co-relation 24542. Up to 5569 conditions per place. [2022-12-13 15:46:38,083 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 63 selfloop transitions, 11 changer transitions 19/99 dead transitions. [2022-12-13 15:46:38,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 99 transitions, 588 flow [2022-12-13 15:46:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:46:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:46:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 757 transitions. [2022-12-13 15:46:38,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2612146307798482 [2022-12-13 15:46:38,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 757 transitions. [2022-12-13 15:46:38,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 757 transitions. [2022-12-13 15:46:38,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:38,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 757 transitions. [2022-12-13 15:46:38,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.16666666666667) internal successors, (757), 6 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 15:46:38,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 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 15:46:38,090 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 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 15:46:38,090 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 240 flow. Second operand 6 states and 757 transitions. [2022-12-13 15:46:38,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 99 transitions, 588 flow [2022-12-13 15:46:38,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 99 transitions, 585 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:46:38,101 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 256 flow [2022-12-13 15:46:38,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2022-12-13 15:46:38,102 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -7 predicate places. [2022-12-13 15:46:38,102 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 256 flow [2022-12-13 15:46:38,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 113.5) internal successors, (1362), 12 states have internal predecessors, (1362), 0 states have call successors, (0), 0 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 15:46:38,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:38,102 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:38,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:46:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 15:46:38,304 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:38,305 INFO L85 PathProgramCache]: Analyzing trace with hash -357015919, now seen corresponding path program 1 times [2022-12-13 15:46:38,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:38,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193783684] [2022-12-13 15:46:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:38,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:38,518 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 15:46:38,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:38,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193783684] [2022-12-13 15:46:38,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193783684] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:46:38,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057321808] [2022-12-13 15:46:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:38,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:38,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:38,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:46:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:38,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 15:46:38,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:46:38,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:46:38,969 INFO L321 Elim1Store]: treesize reduction 500, result has 9.7 percent of original size [2022-12-13 15:46:38,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 46 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 426 treesize of output 438 [2022-12-13 15:46:39,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:46:39,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-12-13 15:46:39,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 11 [2022-12-13 15:46:39,181 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 5 treesize of output 3 [2022-12-13 15:46:39,257 INFO L321 Elim1Store]: treesize reduction 120, result has 35.1 percent of original size [2022-12-13 15:46:39,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 55 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 23 case distinctions, treesize of input 301 treesize of output 317 [2022-12-13 15:46:39,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:46:39,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 52 [2022-12-13 15:46:39,952 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 15:46:39,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:46:40,063 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 15:46:40,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057321808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:46:40,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:46:40,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-12-13 15:46:40,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629876955] [2022-12-13 15:46:40,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:46:40,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:46:40,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:46:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:46:41,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 483 [2022-12-13 15:46:41,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 256 flow. Second operand has 14 states, 14 states have (on average 165.28571428571428) internal successors, (2314), 14 states have internal predecessors, (2314), 0 states have call successors, (0), 0 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 15:46:41,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:41,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 483 [2022-12-13 15:46:41,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:42,988 INFO L130 PetriNetUnfolder]: 5805/9186 cut-off events. [2022-12-13 15:46:42,989 INFO L131 PetriNetUnfolder]: For 7733/7733 co-relation queries the response was YES. [2022-12-13 15:46:43,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26044 conditions, 9186 events. 5805/9186 cut-off events. For 7733/7733 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 55868 event pairs, 1377 based on Foata normal form. 25/9209 useless extension candidates. Maximal degree in co-relation 26029. Up to 3523 conditions per place. [2022-12-13 15:46:43,025 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 84 selfloop transitions, 21 changer transitions 23/134 dead transitions. [2022-12-13 15:46:43,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 134 transitions, 862 flow [2022-12-13 15:46:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:46:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:46:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2093 transitions. [2022-12-13 15:46:43,029 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2022-12-13 15:46:43,029 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2093 transitions. [2022-12-13 15:46:43,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2093 transitions. [2022-12-13 15:46:43,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:43,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2093 transitions. [2022-12-13 15:46:43,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 174.41666666666666) internal successors, (2093), 12 states have internal predecessors, (2093), 0 states have call successors, (0), 0 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 15:46:43,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 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 15:46:43,036 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 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 15:46:43,036 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 256 flow. Second operand 12 states and 2093 transitions. [2022-12-13 15:46:43,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 134 transitions, 862 flow [2022-12-13 15:46:43,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 134 transitions, 804 flow, removed 23 selfloop flow, removed 4 redundant places. [2022-12-13 15:46:43,057 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 365 flow [2022-12-13 15:46:43,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=365, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2022-12-13 15:46:43,057 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 6 predicate places. [2022-12-13 15:46:43,057 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 365 flow [2022-12-13 15:46:43,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 165.28571428571428) internal successors, (2314), 14 states have internal predecessors, (2314), 0 states have call successors, (0), 0 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 15:46:43,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:43,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:43,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 15:46:43,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 15:46:43,259 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1817410110, now seen corresponding path program 1 times [2022-12-13 15:46:43,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:43,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774281739] [2022-12-13 15:46:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:43,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:43,419 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 15:46:43,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774281739] [2022-12-13 15:46:43,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774281739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:46:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718560719] [2022-12-13 15:46:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:43,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:43,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:43,421 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:43,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:46:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:46:43,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 15:46:43,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:46:43,659 INFO L321 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2022-12-13 15:46:43,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 10 case distinctions, treesize of input 400 treesize of output 362 [2022-12-13 15:46:43,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-12-13 15:46:43,769 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 5 treesize of output 3 [2022-12-13 15:46:43,846 INFO L321 Elim1Store]: treesize reduction 104, result has 43.8 percent of original size [2022-12-13 15:46:43,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 55 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 23 case distinctions, treesize of input 182 treesize of output 214 [2022-12-13 15:46:43,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-12-13 15:46:44,042 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 15:46:44,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:46:44,059 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_443 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#checkPool~0#1.base| v_ArrVal_443) |c_~#iSet~0.base|) |c_~#iSet~0.offset|) 0)) is different from false [2022-12-13 15:46:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 15:46:44,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718560719] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:46:44,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:46:44,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-12-13 15:46:44,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875390128] [2022-12-13 15:46:44,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:46:44,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:46:44,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:44,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:46:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=97, Unknown=1, NotChecked=20, Total=156 [2022-12-13 15:46:44,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 483 [2022-12-13 15:46:44,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 365 flow. Second operand has 13 states, 13 states have (on average 139.46153846153845) internal successors, (1813), 13 states have internal predecessors, (1813), 0 states have call successors, (0), 0 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 15:46:44,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:46:44,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 483 [2022-12-13 15:46:44,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:46:45,207 INFO L130 PetriNetUnfolder]: 5753/9030 cut-off events. [2022-12-13 15:46:45,207 INFO L131 PetriNetUnfolder]: For 15301/15301 co-relation queries the response was YES. [2022-12-13 15:46:45,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28828 conditions, 9030 events. 5753/9030 cut-off events. For 15301/15301 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 52842 event pairs, 2929 based on Foata normal form. 12/9040 useless extension candidates. Maximal degree in co-relation 28809. Up to 6406 conditions per place. [2022-12-13 15:46:45,248 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 55 selfloop transitions, 9 changer transitions 4/74 dead transitions. [2022-12-13 15:46:45,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 529 flow [2022-12-13 15:46:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:46:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:46:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1167 transitions. [2022-12-13 15:46:45,251 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30201863354037267 [2022-12-13 15:46:45,251 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1167 transitions. [2022-12-13 15:46:45,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1167 transitions. [2022-12-13 15:46:45,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:46:45,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1167 transitions. [2022-12-13 15:46:45,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 145.875) internal successors, (1167), 8 states have internal predecessors, (1167), 0 states have call successors, (0), 0 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 15:46:45,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 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 15:46:45,256 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 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 15:46:45,256 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 365 flow. Second operand 8 states and 1167 transitions. [2022-12-13 15:46:45,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 529 flow [2022-12-13 15:46:45,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 504 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-13 15:46:45,297 INFO L231 Difference]: Finished difference. Result has 79 places, 53 transitions, 314 flow [2022-12-13 15:46:45,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=79, PETRI_TRANSITIONS=53} [2022-12-13 15:46:45,297 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 10 predicate places. [2022-12-13 15:46:45,297 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 53 transitions, 314 flow [2022-12-13 15:46:45,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 139.46153846153845) internal successors, (1813), 13 states have internal predecessors, (1813), 0 states have call successors, (0), 0 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 15:46:45,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:46:45,298 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:45,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:46:45,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:45,500 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:46:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash 186055147, now seen corresponding path program 1 times [2022-12-13 15:46:45,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:45,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490422960] [2022-12-13 15:46:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:46:45,557 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:46:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:46:45,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:46:45,582 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:46:45,582 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (33 of 34 remaining) [2022-12-13 15:46:45,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (32 of 34 remaining) [2022-12-13 15:46:45,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2022-12-13 15:46:45,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2022-12-13 15:46:45,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2022-12-13 15:46:45,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 34 remaining) [2022-12-13 15:46:45,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2022-12-13 15:46:45,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2022-12-13 15:46:45,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2022-12-13 15:46:45,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 34 remaining) [2022-12-13 15:46:45,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2022-12-13 15:46:45,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2022-12-13 15:46:45,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 34 remaining) [2022-12-13 15:46:45,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2022-12-13 15:46:45,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2022-12-13 15:46:45,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK (3 of 34 remaining) [2022-12-13 15:46:45,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 34 remaining) [2022-12-13 15:46:45,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 34 remaining) [2022-12-13 15:46:45,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 34 remaining) [2022-12-13 15:46:45,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 15:46:45,585 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:45,588 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2022-12-13 15:46:45,588 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 15:46:45,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 03:46:45 BasicIcfg [2022-12-13 15:46:45,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 15:46:45,611 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 15:46:45,611 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 15:46:45,612 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 15:46:45,612 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:45:51" (3/4) ... [2022-12-13 15:46:45,614 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 15:46:45,614 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 15:46:45,614 INFO L158 Benchmark]: Toolchain (without parser) took 54634.59ms. Allocated memory was 132.1MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 95.8MB in the beginning and 654.9MB in the end (delta: -559.1MB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2022-12-13 15:46:45,614 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 132.1MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:46:45,615 INFO L158 Benchmark]: CACSL2BoogieTranslator took 469.98ms. Allocated memory is still 132.1MB. Free memory was 95.8MB in the beginning and 56.1MB in the end (delta: 39.6MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-12-13 15:46:45,615 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.46ms. Allocated memory is still 132.1MB. Free memory was 56.1MB in the beginning and 53.3MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 15:46:45,615 INFO L158 Benchmark]: Boogie Preprocessor took 20.75ms. Allocated memory is still 132.1MB. Free memory was 53.3MB in the beginning and 51.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:46:45,615 INFO L158 Benchmark]: RCFGBuilder took 440.42ms. Allocated memory is still 159.4MB. Free memory was 131.3MB in the beginning and 110.6MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-12-13 15:46:45,615 INFO L158 Benchmark]: TraceAbstraction took 53652.37ms. Allocated memory was 159.4MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 109.9MB in the beginning and 654.9MB in the end (delta: -545.0MB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2022-12-13 15:46:45,615 INFO L158 Benchmark]: Witness Printer took 2.53ms. Allocated memory is still 2.3GB. Free memory is still 654.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:46:45,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 132.1MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 469.98ms. Allocated memory is still 132.1MB. Free memory was 95.8MB in the beginning and 56.1MB in the end (delta: 39.6MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.46ms. Allocated memory is still 132.1MB. Free memory was 56.1MB in the beginning and 53.3MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.75ms. Allocated memory is still 132.1MB. Free memory was 53.3MB in the beginning and 51.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 440.42ms. Allocated memory is still 159.4MB. Free memory was 131.3MB in the beginning and 110.6MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 53652.37ms. Allocated memory was 159.4MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 109.9MB in the beginning and 654.9MB in the end (delta: -545.0MB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. * Witness Printer took 2.53ms. Allocated memory is still 2.3GB. Free memory is still 654.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.4s, 192 PlacesBefore, 57 PlacesAfterwards, 204 TransitionsBefore, 56 TransitionsAfterwards, 2694 CoEnabledTransitionPairs, 7 FixpointIterations, 107 TrivialSequentialCompositions, 97 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 13 ChoiceCompositions, 238 TotalNumberOfCompositions, 4247 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2873, independent: 2835, independent conditional: 0, independent unconditional: 2835, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1525, independent: 1518, independent conditional: 0, independent unconditional: 1518, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2873, independent: 1317, independent conditional: 0, independent unconditional: 1317, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 1525, unknown conditional: 0, unknown unconditional: 1525] , Statistics on independence cache: Total cache size (in pairs): 35, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 13.2s, 211 PlacesBefore, 69 PlacesAfterwards, 224 TransitionsBefore, 68 TransitionsAfterwards, 6052 CoEnabledTransitionPairs, 9 FixpointIterations, 119 TrivialSequentialCompositions, 99 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 27 ConcurrentYvCompositions, 14 ChoiceCompositions, 259 TotalNumberOfCompositions, 13164 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8837, independent: 8734, independent conditional: 0, independent unconditional: 8734, dependent: 103, dependent conditional: 0, dependent unconditional: 103, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3542, independent: 3525, independent conditional: 0, independent unconditional: 3525, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8837, independent: 5209, independent conditional: 0, independent unconditional: 5209, dependent: 86, dependent conditional: 0, dependent unconditional: 86, unknown: 3542, unknown conditional: 0, unknown unconditional: 3542] , Statistics on independence cache: Total cache size (in pairs): 173, Positive cache size: 168, Positive conditional cache size: 0, Positive unconditional cache size: 168, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1295]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1295. Possible FailurePath: [L1236] 0 static int iSet = 2; [L1237] 0 static int iCheck = 2; [L1238] 0 static int a = 0; [L1239] 0 static int b = 0; [L1245] 0 int i, err; [L1246] COND TRUE 0 argc != 1 [L1247] COND FALSE 0 !(argc != 3) [L1255] EXPR 0 \read(iSet) [L1255] 0 iSet > 100000 || iCheck > 100000 [L1255] EXPR 0 \read(iCheck) [L1255] 0 iSet > 100000 || iCheck > 100000 [L1255] COND FALSE 0 !(iSet > 100000 || iCheck > 100000) [L1258] EXPR 0 \read(iSet) [L1258] 0 pthread_t setPool[iSet]; [L1259] EXPR 0 \read(iCheck) [L1259] 0 pthread_t checkPool[iCheck]; [L1260] 0 i = 0 VAL [\old(argc)=3, \read(iCheck)=14, \read(iSet)=1, a=0, argc=3, argv={59:57}, argv={59:57}, b=0, checkPool={13:0}, i=0, iCheck={10:0}, iSet={9:0}, setPool={11:0}] [L1260] EXPR 0 \read(iSet) [L1260] COND TRUE 0 i < iSet [L1261] EXPR, FCALL, FORK 0 pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)) VAL [\old(argc)=3, \read(iCheck)=14, \read(iSet)=1, a=0, argc=3, argv={59:57}, argv={59:57}, b=0, checkPool={13:0}, i=0, iCheck={10:0}, iSet={9:0}, param={0:0}, pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0))=-2, setPool={11:0}] [L1288] 1 a = 1 VAL [a=1, b=0, iCheck={10:0}, iSet={9:0}, param={0:0}, param={0:0}] [L1261] EXPR 0 err = pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)) VAL [\old(argc)=3, \read(iCheck)=14, \read(iSet)=1, a=1, argc=3, argv={59:57}, argv={59:57}, b=0, checkPool={13:0}, err=0, i=0, iCheck={10:0}, iSet={9:0}, param={0:0}, param={0:0}, pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0))=0, pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0))=-2, setPool={11:0}] [L1261] COND FALSE 0 !(0 != (err = pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)))) [L1260] 0 i++ VAL [\old(argc)=3, \read(iCheck)=14, \read(iSet)=1, a=1, argc=3, argv={59:57}, argv={59:57}, b=0, checkPool={13:0}, err=0, fprintf(stderr, "Error [%d] found creating set thread.\n", err)=58, i=1, iCheck={10:0}, iSet={9:0}, param={0:0}, param={0:0}, setPool={11:0}] [L1260] EXPR 0 \read(iSet) [L1260] COND FALSE 0 !(i < iSet) [L1266] 0 i = 0 VAL [\old(argc)=3, \read(iCheck)=14, \read(iSet)=1, a=1, argc=3, argv={59:57}, argv={59:57}, b=0, checkPool={13:0}, err=0, fprintf(stderr, "Error [%d] found creating set thread.\n", err)=58, i=0, iCheck={10:0}, iSet={9:0}, param={0:0}, param={0:0}, setPool={11:0}] [L1266] EXPR 0 \read(iCheck) [L1266] COND TRUE 0 i < iCheck [L1267-L1268] FCALL, FORK 0 pthread_create(&checkPool[i], ((void *)0), &checkThread, ((void *)0)) VAL [\old(argc)=3, \read(iCheck)=14, \read(iSet)=1, a=1, argc=3, argv={59:57}, argv={59:57}, b=0, checkPool={13:0}, err=0, fprintf(stderr, "Error [%d] found creating set thread.\n", err)=58, i=0, iCheck={10:0}, iSet={9:0}, param={0:0}, param={0:0}, param={0:0}, pthread_create(&checkPool[i], ((void *)0), &checkThread, ((void *)0))=-1, setPool={11:0}] [L1293] COND TRUE 2 ! ((a == 0 && b == 0) || (a == 1 && b == -1)) [L1295] 2 reach_error() VAL [a=1, b=0, iCheck={10:0}, iSet={9:0}, param={0:0}, param={0:0}, param={0:0}, param={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1244]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1267]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1261]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 203 locations, 33 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.0s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.5s, HoareTripleCheckerStatistics: 41 mSolverCounterUnknown, 2699 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1576 mSDsluCounter, 173 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 88 mSDsCounter, 165 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3215 IncrementalHoareTripleChecker+Invalid, 3421 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 165 mSolverCounterUnsat, 85 mSDtfsCounter, 3215 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=312occurred in iteration=14, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 53 ConstructedInterpolants, 1 QuantifiedInterpolants, 1059 SizeOfPredicates, 6 NumberOfNonLiveVariables, 509 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 18 InterpolantComputations, 13 PerfectInterpolantSequences, 2/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 218 locations, 34 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 36.5s, OverallIterations: 16, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 17.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 13.3s, HoareTripleCheckerStatistics: 84 mSolverCounterUnknown, 3689 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2255 mSDsluCounter, 421 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 100 IncrementalHoareTripleChecker+Unchecked, 177 mSDsCounter, 300 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5755 IncrementalHoareTripleChecker+Invalid, 6239 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 300 mSolverCounterUnsat, 244 mSDtfsCounter, 5755 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=365occurred in iteration=14, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 82 ConstructedInterpolants, 5 QuantifiedInterpolants, 3238 SizeOfPredicates, 57 NumberOfNonLiveVariables, 279 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 21 InterpolantComputations, 12 PerfectInterpolantSequences, 1/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 15:46:45,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/reorder_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b8118921f4e94a266cc060fbf2fdaa97ed8f96343f174115bf05a8f09a1b77a8 --- 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 15:46:47,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:46:47,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:46:47,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:46:47,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:46:47,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:46:47,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:46:47,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:46:47,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:46:47,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:46:47,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:46:47,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:46:47,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:46:47,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:46:47,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:46:47,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:46:47,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:46:47,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:46:47,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:46:47,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:46:47,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:46:47,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:46:47,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:46:47,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:46:47,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:46:47,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:46:47,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:46:47,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:46:47,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:46:47,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:46:47,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:46:47,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:46:47,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:46:47,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:46:47,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:46:47,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:46:47,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:46:47,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:46:47,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:46:47,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:46:47,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:46:47,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 15:46:47,384 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:46:47,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:46:47,385 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:46:47,385 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:46:47,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:46:47,386 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:46:47,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:46:47,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:46:47,387 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:46:47,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:46:47,387 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:46:47,387 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:46:47,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:46:47,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:46:47,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:46:47,388 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:46:47,388 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:46:47,388 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:46:47,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:46:47,388 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:46:47,389 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 15:46:47,389 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 15:46:47,389 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:46:47,389 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:46:47,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:46:47,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:46:47,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:46:47,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:46:47,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:46:47,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:46:47,390 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 15:46:47,395 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 15:46:47,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:46:47,395 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:46:47,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:46:47,395 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 15:46:47,396 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:46:47,396 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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8118921f4e94a266cc060fbf2fdaa97ed8f96343f174115bf05a8f09a1b77a8 [2022-12-13 15:46:47,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:46:47,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:46:47,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:46:47,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:46:47,626 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:46:47,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/reorder_2.i [2022-12-13 15:46:50,127 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:46:50,355 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:46:50,356 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/sv-benchmarks/c/pthread/reorder_2.i [2022-12-13 15:46:50,371 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/data/e7691f1f0/5e93ed005c2e45edb125663030827c7f/FLAGbd17d49ff [2022-12-13 15:46:50,387 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/data/e7691f1f0/5e93ed005c2e45edb125663030827c7f [2022-12-13 15:46:50,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:46:50,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:46:50,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:46:50,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:46:50,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:46:50,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:50,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bddb215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50, skipping insertion in model container [2022-12-13 15:46:50,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:50,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:46:50,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:46:50,830 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,836 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,838 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,840 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,841 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,843 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,843 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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/sv-benchmarks/c/pthread/reorder_2.i[59859,59872] [2022-12-13 15:46:50,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:46:50,853 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:46:50,882 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,884 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,886 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,886 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,887 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,889 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 15:46:50,889 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_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/sv-benchmarks/c/pthread/reorder_2.i[59859,59872] [2022-12-13 15:46:50,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:46:50,938 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:46:50,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50 WrapperNode [2022-12-13 15:46:50,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:46:50,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:46:50,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:46:50,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:46:50,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:50,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:50,975 INFO L138 Inliner]: procedures = 374, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 147 [2022-12-13 15:46:50,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:46:50,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:46:50,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:46:50,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:46:50,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:50,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:50,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:50,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:50,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:50,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:51,000 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:51,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:51,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:46:51,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:46:51,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:46:51,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:46:51,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (1/1) ... [2022-12-13 15:46:51,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:46:51,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:51,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:46:51,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:46:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 15:46:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:46:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:46:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 15:46:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 15:46:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-12-13 15:46:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-12-13 15:46:51,070 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-12-13 15:46:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:46:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-12-13 15:46:51,070 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-12-13 15:46:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:46:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:46:51,072 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 15:46:51,208 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:46:51,210 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:46:51,597 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:46:51,603 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:46:51,603 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 15:46:51,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:46:51 BoogieIcfgContainer [2022-12-13 15:46:51,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:46:51,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:46:51,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:46:51,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:46:51,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:46:50" (1/3) ... [2022-12-13 15:46:51,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c71676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:46:51, skipping insertion in model container [2022-12-13 15:46:51,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:46:50" (2/3) ... [2022-12-13 15:46:51,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c71676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:46:51, skipping insertion in model container [2022-12-13 15:46:51,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:46:51" (3/3) ... [2022-12-13 15:46:51,611 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_2.i [2022-12-13 15:46:51,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:46:51,630 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-13 15:46:51,630 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:46:51,675 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 15:46:51,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 203 transitions, 428 flow [2022-12-13 15:46:51,781 INFO L130 PetriNetUnfolder]: 37/428 cut-off events. [2022-12-13 15:46:51,781 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 15:46:51,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 428 events. 37/428 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1758 event pairs, 0 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 235. Up to 8 conditions per place. [2022-12-13 15:46:51,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 203 transitions, 428 flow [2022-12-13 15:46:51,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 203 transitions, 428 flow [2022-12-13 15:46:51,793 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:46:51,801 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 203 transitions, 428 flow [2022-12-13 15:46:51,803 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 203 transitions, 428 flow [2022-12-13 15:46:51,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 203 transitions, 428 flow [2022-12-13 15:46:51,846 INFO L130 PetriNetUnfolder]: 37/428 cut-off events. [2022-12-13 15:46:51,846 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 15:46:51,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 428 events. 37/428 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1758 event pairs, 0 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 235. Up to 8 conditions per place. [2022-12-13 15:46:51,849 INFO L119 LiptonReduction]: Number of co-enabled transitions 2694 [2022-12-13 15:47:19,715 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 197 DAG size of output: 183 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 15:47:26,331 INFO L134 LiptonReduction]: Checked pairs total: 4251 [2022-12-13 15:47:26,331 INFO L136 LiptonReduction]: Total number of compositions: 229 [2022-12-13 15:47:26,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:47:26,355 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7a42e7f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:47:26,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-12-13 15:47:26,356 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 15:47:26,357 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:47:26,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:26,357 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 15:47:26,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:26,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:26,363 INFO L85 PathProgramCache]: Analyzing trace with hash 741, now seen corresponding path program 1 times [2022-12-13 15:47:26,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:26,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951049250] [2022-12-13 15:47:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:26,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:26,385 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:26,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 15:47:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:26,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 15:47:26,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:26,450 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 15:47:26,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:26,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:26,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951049250] [2022-12-13 15:47:26,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951049250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:26,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:26,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 15:47:26,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406634025] [2022-12-13 15:47:26,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:26,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:47:26,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:47:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:47:26,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 432 [2022-12-13 15:47:26,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 134 flow. Second operand has 2 states, 2 states have (on average 185.5) internal successors, (371), 2 states have internal predecessors, (371), 0 states have call successors, (0), 0 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 15:47:26,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:26,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 432 [2022-12-13 15:47:26,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:26,697 INFO L130 PetriNetUnfolder]: 262/592 cut-off events. [2022-12-13 15:47:26,697 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 15:47:26,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158 conditions, 592 events. 262/592 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3108 event pairs, 246 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 884. Up to 532 conditions per place. [2022-12-13 15:47:26,701 INFO L137 encePairwiseOnDemand]: 420/432 looper letters, 32 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2022-12-13 15:47:26,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 174 flow [2022-12-13 15:47:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:47:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 15:47:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 414 transitions. [2022-12-13 15:47:26,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2022-12-13 15:47:26,715 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 414 transitions. [2022-12-13 15:47:26,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 414 transitions. [2022-12-13 15:47:26,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:26,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 414 transitions. [2022-12-13 15:47:26,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 207.0) internal successors, (414), 2 states have internal predecessors, (414), 0 states have call successors, (0), 0 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 15:47:26,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 432.0) internal successors, (1296), 3 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 15:47:26,727 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 432.0) internal successors, (1296), 3 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 15:47:26,729 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 134 flow. Second operand 2 states and 414 transitions. [2022-12-13 15:47:26,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 174 flow [2022-12-13 15:47:26,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:47:26,734 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 110 flow [2022-12-13 15:47:26,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2022-12-13 15:47:26,740 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2022-12-13 15:47:26,740 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 110 flow [2022-12-13 15:47:26,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 185.5) internal successors, (371), 2 states have internal predecessors, (371), 0 states have call successors, (0), 0 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 15:47:26,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:26,741 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:47:26,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:47:26,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:26,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:26,945 INFO L85 PathProgramCache]: Analyzing trace with hash 23382, now seen corresponding path program 1 times [2022-12-13 15:47:26,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:26,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447530368] [2022-12-13 15:47:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:26,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:26,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:26,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:26,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 15:47:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:27,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:47:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:27,212 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-12-13 15:47:27,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-12-13 15:47:27,247 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 15:47:27,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:27,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:27,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447530368] [2022-12-13 15:47:27,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447530368] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:27,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:27,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:47:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227345635] [2022-12-13 15:47:27,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:27,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:27,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:27,421 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 432 [2022-12-13 15:47:27,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 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 15:47:27,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:27,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 432 [2022-12-13 15:47:27,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:27,640 INFO L130 PetriNetUnfolder]: 262/583 cut-off events. [2022-12-13 15:47:27,640 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 15:47:27,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 583 events. 262/583 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3069 event pairs, 214 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 1145. Up to 467 conditions per place. [2022-12-13 15:47:27,642 INFO L137 encePairwiseOnDemand]: 427/432 looper letters, 33 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2022-12-13 15:47:27,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 186 flow [2022-12-13 15:47:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-12-13 15:47:27,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44135802469135804 [2022-12-13 15:47:27,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-12-13 15:47:27,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-12-13 15:47:27,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:27,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-12-13 15:47:27,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 15:47:27,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:27,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:27,649 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 110 flow. Second operand 3 states and 572 transitions. [2022-12-13 15:47:27,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 186 flow [2022-12-13 15:47:27,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 186 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:47:27,651 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 112 flow [2022-12-13 15:47:27,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-12-13 15:47:27,651 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2022-12-13 15:47:27,652 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 112 flow [2022-12-13 15:47:27,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 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 15:47:27,652 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:27,652 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:47:27,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 15:47:27,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:27,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash 23383, now seen corresponding path program 1 times [2022-12-13 15:47:27,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:27,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016483931] [2022-12-13 15:47:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:27,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:27,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:27,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:27,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 15:47:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:47:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:47:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:47:27,970 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:47:27,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-12-13 15:47:28,000 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-13 15:47:28,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-12-13 15:47:28,024 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 15:47:28,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:28,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:28,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016483931] [2022-12-13 15:47:28,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016483931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:28,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:28,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:47:28,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687125895] [2022-12-13 15:47:28,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:28,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:28,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:28,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 432 [2022-12-13 15:47:28,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 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 15:47:28,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:28,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 432 [2022-12-13 15:47:28,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:28,365 INFO L130 PetriNetUnfolder]: 262/574 cut-off events. [2022-12-13 15:47:28,365 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-12-13 15:47:28,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 574 events. 262/574 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2930 event pairs, 246 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 1169. Up to 531 conditions per place. [2022-12-13 15:47:28,367 INFO L137 encePairwiseOnDemand]: 429/432 looper letters, 31 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 15:47:28,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 172 flow [2022-12-13 15:47:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-12-13 15:47:28,369 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2022-12-13 15:47:28,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-12-13 15:47:28,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-12-13 15:47:28,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:28,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-12-13 15:47:28,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 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 15:47:28,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:28,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:28,372 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 112 flow. Second operand 3 states and 568 transitions. [2022-12-13 15:47:28,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 172 flow [2022-12-13 15:47:28,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:47:28,374 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 104 flow [2022-12-13 15:47:28,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2022-12-13 15:47:28,374 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -13 predicate places. [2022-12-13 15:47:28,374 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 104 flow [2022-12-13 15:47:28,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 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 15:47:28,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:28,375 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:47:28,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 15:47:28,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:28,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:28,576 INFO L85 PathProgramCache]: Analyzing trace with hash 23733, now seen corresponding path program 1 times [2022-12-13 15:47:28,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:28,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792503058] [2022-12-13 15:47:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:28,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:28,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:28,578 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:28,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 15:47:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:47:28,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:28,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:47:28,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-13 15:47:28,662 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 10 treesize of output 8 [2022-12-13 15:47:28,688 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 15:47:28,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:28,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:28,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792503058] [2022-12-13 15:47:28,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792503058] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:28,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:28,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:47:28,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344204922] [2022-12-13 15:47:28,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:28,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:28,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:28,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:28,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:29,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 432 [2022-12-13 15:47:29,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 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 15:47:29,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:29,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 432 [2022-12-13 15:47:29,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:29,317 INFO L130 PetriNetUnfolder]: 263/617 cut-off events. [2022-12-13 15:47:29,318 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:47:29,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1203 conditions, 617 events. 263/617 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3390 event pairs, 246 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 1197. Up to 527 conditions per place. [2022-12-13 15:47:29,321 INFO L137 encePairwiseOnDemand]: 425/432 looper letters, 40 selfloop transitions, 4 changer transitions 3/55 dead transitions. [2022-12-13 15:47:29,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 228 flow [2022-12-13 15:47:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-12-13 15:47:29,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43364197530864196 [2022-12-13 15:47:29,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-12-13 15:47:29,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-12-13 15:47:29,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:29,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-12-13 15:47:29,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 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 15:47:29,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:29,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:29,329 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 104 flow. Second operand 3 states and 562 transitions. [2022-12-13 15:47:29,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 228 flow [2022-12-13 15:47:29,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:47:29,331 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 133 flow [2022-12-13 15:47:29,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2022-12-13 15:47:29,332 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2022-12-13 15:47:29,332 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 133 flow [2022-12-13 15:47:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 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 15:47:29,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:29,333 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:47:29,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 15:47:29,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:29,534 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:29,534 INFO L85 PathProgramCache]: Analyzing trace with hash 23732, now seen corresponding path program 1 times [2022-12-13 15:47:29,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:29,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585649941] [2022-12-13 15:47:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:29,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:29,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:29,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:29,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 15:47:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:29,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:47:29,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:29,629 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 15:47:29,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 19 treesize of output 22 [2022-12-13 15:47:29,634 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 15:47:29,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:29,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:29,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585649941] [2022-12-13 15:47:29,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585649941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:29,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:29,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:47:29,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216156746] [2022-12-13 15:47:29,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:29,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:29,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2022-12-13 15:47:29,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 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 15:47:29,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:29,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2022-12-13 15:47:29,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:29,902 INFO L130 PetriNetUnfolder]: 244/557 cut-off events. [2022-12-13 15:47:29,902 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 15:47:29,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 557 events. 244/557 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3042 event pairs, 196 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1173. Up to 433 conditions per place. [2022-12-13 15:47:29,904 INFO L137 encePairwiseOnDemand]: 427/432 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2022-12-13 15:47:29,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 211 flow [2022-12-13 15:47:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2022-12-13 15:47:29,906 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2022-12-13 15:47:29,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2022-12-13 15:47:29,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2022-12-13 15:47:29,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:29,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2022-12-13 15:47:29,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 15:47:29,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:29,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:29,909 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 133 flow. Second operand 3 states and 564 transitions. [2022-12-13 15:47:29,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 211 flow [2022-12-13 15:47:29,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:47:29,910 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 133 flow [2022-12-13 15:47:29,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-13 15:47:29,911 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -12 predicate places. [2022-12-13 15:47:29,911 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 133 flow [2022-12-13 15:47:29,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 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 15:47:29,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:29,911 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:47:29,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 15:47:30,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:30,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:30,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:30,114 INFO L85 PathProgramCache]: Analyzing trace with hash 735120, now seen corresponding path program 1 times [2022-12-13 15:47:30,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:30,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306696502] [2022-12-13 15:47:30,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:30,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:30,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:30,119 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:30,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 15:47:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:47:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:30,221 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-12-13 15:47:30,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-12-13 15:47:30,240 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 15:47:30,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:30,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:30,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306696502] [2022-12-13 15:47:30,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306696502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:30,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:30,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:47:30,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835793732] [2022-12-13 15:47:30,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:30,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:30,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:30,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:30,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:30,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 432 [2022-12-13 15:47:30,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 15:47:30,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:30,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 432 [2022-12-13 15:47:30,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:30,531 INFO L130 PetriNetUnfolder]: 244/542 cut-off events. [2022-12-13 15:47:30,531 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-12-13 15:47:30,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 542 events. 244/542 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2859 event pairs, 196 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1189. Up to 433 conditions per place. [2022-12-13 15:47:30,532 INFO L137 encePairwiseOnDemand]: 427/432 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2022-12-13 15:47:30,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 211 flow [2022-12-13 15:47:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2022-12-13 15:47:30,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4398148148148148 [2022-12-13 15:47:30,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2022-12-13 15:47:30,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2022-12-13 15:47:30,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:30,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2022-12-13 15:47:30,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:30,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:30,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:30,537 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 133 flow. Second operand 3 states and 570 transitions. [2022-12-13 15:47:30,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 211 flow [2022-12-13 15:47:30,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:47:30,538 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 129 flow [2022-12-13 15:47:30,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2022-12-13 15:47:30,539 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -14 predicate places. [2022-12-13 15:47:30,539 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 129 flow [2022-12-13 15:47:30,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 15:47:30,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:30,539 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:47:30,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 15:47:30,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:30,741 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:30,742 INFO L85 PathProgramCache]: Analyzing trace with hash 735121, now seen corresponding path program 1 times [2022-12-13 15:47:30,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:30,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512632277] [2022-12-13 15:47:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:30,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:30,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:30,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:30,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 15:47:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:30,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:47:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:47:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:47:30,857 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:47:30,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-12-13 15:47:30,880 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-13 15:47:30,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-12-13 15:47:30,902 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 15:47:30,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:30,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:30,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512632277] [2022-12-13 15:47:30,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512632277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:30,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:30,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:47:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877801271] [2022-12-13 15:47:30,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:30,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:30,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:31,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 432 [2022-12-13 15:47:31,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 15:47:31,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:31,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 432 [2022-12-13 15:47:31,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:31,244 INFO L130 PetriNetUnfolder]: 244/527 cut-off events. [2022-12-13 15:47:31,244 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-12-13 15:47:31,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 527 events. 244/527 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2707 event pairs, 228 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 1174. Up to 498 conditions per place. [2022-12-13 15:47:31,246 INFO L137 encePairwiseOnDemand]: 429/432 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-12-13 15:47:31,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 191 flow [2022-12-13 15:47:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-12-13 15:47:31,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367283950617284 [2022-12-13 15:47:31,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-12-13 15:47:31,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-12-13 15:47:31,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:31,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-12-13 15:47:31,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 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 15:47:31,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:31,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:31,250 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 129 flow. Second operand 3 states and 566 transitions. [2022-12-13 15:47:31,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 191 flow [2022-12-13 15:47:31,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 183 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:47:31,251 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 119 flow [2022-12-13 15:47:31,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-12-13 15:47:31,251 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -16 predicate places. [2022-12-13 15:47:31,252 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 119 flow [2022-12-13 15:47:31,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 15:47:31,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:31,252 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:47:31,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 15:47:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:31,452 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash 735319, now seen corresponding path program 1 times [2022-12-13 15:47:31,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:31,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249592261] [2022-12-13 15:47:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:31,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:31,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:31,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:31,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 15:47:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:31,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:47:31,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:31,533 INFO L321 Elim1Store]: treesize reduction 17, result has 34.6 percent of original size [2022-12-13 15:47:31,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 15 treesize of output 21 [2022-12-13 15:47:31,574 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 15:47:31,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:31,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:31,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249592261] [2022-12-13 15:47:31,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249592261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:31,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:31,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:47:31,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602369582] [2022-12-13 15:47:31,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:31,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:47:31,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:47:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:47:31,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 432 [2022-12-13 15:47:31,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 15:47:31,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:31,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 432 [2022-12-13 15:47:31,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:32,168 INFO L130 PetriNetUnfolder]: 244/525 cut-off events. [2022-12-13 15:47:32,168 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 15:47:32,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 525 events. 244/525 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2589 event pairs, 228 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 1137. Up to 489 conditions per place. [2022-12-13 15:47:32,170 INFO L137 encePairwiseOnDemand]: 426/432 looper letters, 34 selfloop transitions, 4 changer transitions 2/44 dead transitions. [2022-12-13 15:47:32,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 213 flow [2022-12-13 15:47:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2022-12-13 15:47:32,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41898148148148145 [2022-12-13 15:47:32,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2022-12-13 15:47:32,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2022-12-13 15:47:32,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:32,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2022-12-13 15:47:32,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:32,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:32,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:32,174 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 119 flow. Second operand 3 states and 543 transitions. [2022-12-13 15:47:32,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 213 flow [2022-12-13 15:47:32,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:47:32,175 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 134 flow [2022-12-13 15:47:32,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2022-12-13 15:47:32,175 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -14 predicate places. [2022-12-13 15:47:32,176 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 134 flow [2022-12-13 15:47:32,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 15:47:32,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:32,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:47:32,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 15:47:32,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:32,378 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:32,379 INFO L85 PathProgramCache]: Analyzing trace with hash 735318, now seen corresponding path program 1 times [2022-12-13 15:47:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:32,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144031170] [2022-12-13 15:47:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:32,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:32,384 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:32,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 15:47:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:32,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:47:32,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:32,579 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 15:47:32,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 19 [2022-12-13 15:47:32,585 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 15:47:32,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:32,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:32,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144031170] [2022-12-13 15:47:32,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144031170] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:32,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:32,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:47:32,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247866878] [2022-12-13 15:47:32,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:32,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:32,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:32,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:32,678 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2022-12-13 15:47:32,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 15:47:32,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:32,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2022-12-13 15:47:32,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:32,838 INFO L130 PetriNetUnfolder]: 212/460 cut-off events. [2022-12-13 15:47:32,838 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-12-13 15:47:32,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 460 events. 212/460 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2274 event pairs, 164 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 1045. Up to 366 conditions per place. [2022-12-13 15:47:32,839 INFO L137 encePairwiseOnDemand]: 427/432 looper letters, 31 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2022-12-13 15:47:32,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 208 flow [2022-12-13 15:47:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-12-13 15:47:32,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43364197530864196 [2022-12-13 15:47:32,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-12-13 15:47:32,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-12-13 15:47:32,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:32,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-12-13 15:47:32,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 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 15:47:32,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:32,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:32,846 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 134 flow. Second operand 3 states and 562 transitions. [2022-12-13 15:47:32,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 208 flow [2022-12-13 15:47:32,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:47:32,847 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 130 flow [2022-12-13 15:47:32,847 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2022-12-13 15:47:32,848 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -16 predicate places. [2022-12-13 15:47:32,848 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 130 flow [2022-12-13 15:47:32,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 15:47:32,848 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:32,848 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:47:32,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 15:47:33,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:33,049 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:33,049 INFO L85 PathProgramCache]: Analyzing trace with hash 706658204, now seen corresponding path program 1 times [2022-12-13 15:47:33,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:33,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933504134] [2022-12-13 15:47:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:33,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:33,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:33,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:33,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 15:47:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:33,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:47:33,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:33,121 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 15:47:33,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:33,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:33,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933504134] [2022-12-13 15:47:33,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933504134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:33,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:33,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:47:33,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632955837] [2022-12-13 15:47:33,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:33,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:33,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:33,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:33,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:33,131 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 432 [2022-12-13 15:47:33,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 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 15:47:33,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:33,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 432 [2022-12-13 15:47:33,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:33,360 INFO L130 PetriNetUnfolder]: 192/438 cut-off events. [2022-12-13 15:47:33,360 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-12-13 15:47:33,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 438 events. 192/438 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2164 event pairs, 44 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 1043. Up to 313 conditions per place. [2022-12-13 15:47:33,361 INFO L137 encePairwiseOnDemand]: 429/432 looper letters, 50 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2022-12-13 15:47:33,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 305 flow [2022-12-13 15:47:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2022-12-13 15:47:33,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45987654320987653 [2022-12-13 15:47:33,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2022-12-13 15:47:33,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2022-12-13 15:47:33,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:33,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2022-12-13 15:47:33,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 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 15:47:33,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:33,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:33,365 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 130 flow. Second operand 3 states and 596 transitions. [2022-12-13 15:47:33,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 305 flow [2022-12-13 15:47:33,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:47:33,366 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 130 flow [2022-12-13 15:47:33,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2022-12-13 15:47:33,367 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -15 predicate places. [2022-12-13 15:47:33,367 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 130 flow [2022-12-13 15:47:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 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 15:47:33,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:33,367 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:47:33,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 15:47:33,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:33,568 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash 706685184, now seen corresponding path program 1 times [2022-12-13 15:47:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965065089] [2022-12-13 15:47:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:33,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:33,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:33,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:33,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 15:47:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:33,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:47:33,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:33,732 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 15:47:33,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:47:33,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965065089] [2022-12-13 15:47:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965065089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:33,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:33,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:47:33,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450630820] [2022-12-13 15:47:33,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:33,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:33,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:33,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:34,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 432 [2022-12-13 15:47:34,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 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 15:47:34,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:34,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 432 [2022-12-13 15:47:34,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:34,216 INFO L130 PetriNetUnfolder]: 176/414 cut-off events. [2022-12-13 15:47:34,217 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-12-13 15:47:34,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 414 events. 176/414 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2011 event pairs, 148 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 1041. Up to 354 conditions per place. [2022-12-13 15:47:34,218 INFO L137 encePairwiseOnDemand]: 429/432 looper letters, 30 selfloop transitions, 2 changer transitions 1/37 dead transitions. [2022-12-13 15:47:34,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 200 flow [2022-12-13 15:47:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-12-13 15:47:34,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42746913580246915 [2022-12-13 15:47:34,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-12-13 15:47:34,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-12-13 15:47:34,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:34,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-12-13 15:47:34,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 15:47:34,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:34,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 15:47:34,222 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 130 flow. Second operand 3 states and 554 transitions. [2022-12-13 15:47:34,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 200 flow [2022-12-13 15:47:34,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:47:34,223 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 121 flow [2022-12-13 15:47:34,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2022-12-13 15:47:34,223 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -16 predicate places. [2022-12-13 15:47:34,223 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 121 flow [2022-12-13 15:47:34,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 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 15:47:34,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:34,224 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:47:34,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 15:47:34,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:34,424 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash 707546932, now seen corresponding path program 1 times [2022-12-13 15:47:34,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:34,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095305165] [2022-12-13 15:47:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:34,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:34,426 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:34,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 15:47:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:34,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:47:34,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:47:34,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-13 15:47:34,544 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-13 15:47:34,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-12-13 15:47:34,583 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 33 treesize of output 31 [2022-12-13 15:47:34,684 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 15:47:34,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:34,957 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 15:47:34,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:34,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095305165] [2022-12-13 15:47:34,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095305165] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:34,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:47:34,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:47:34,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029313393] [2022-12-13 15:47:34,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:34,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:47:34,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:34,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:47:34,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=31, Unknown=2, NotChecked=0, Total=56 [2022-12-13 15:47:35,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 432 [2022-12-13 15:47:35,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 121 flow. Second operand has 8 states, 8 states have (on average 111.25) internal successors, (890), 8 states have internal predecessors, (890), 0 states have call successors, (0), 0 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 15:47:35,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:35,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 432 [2022-12-13 15:47:35,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:36,712 INFO L130 PetriNetUnfolder]: 176/426 cut-off events. [2022-12-13 15:47:36,712 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2022-12-13 15:47:36,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 426 events. 176/426 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1968 event pairs, 53 based on Foata normal form. 4/410 useless extension candidates. Maximal degree in co-relation 1046. Up to 287 conditions per place. [2022-12-13 15:47:36,714 INFO L137 encePairwiseOnDemand]: 420/432 looper letters, 36 selfloop transitions, 11 changer transitions 7/58 dead transitions. [2022-12-13 15:47:36,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 298 flow [2022-12-13 15:47:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:47:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:47:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 718 transitions. [2022-12-13 15:47:36,716 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2770061728395062 [2022-12-13 15:47:36,716 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 718 transitions. [2022-12-13 15:47:36,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 718 transitions. [2022-12-13 15:47:36,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:36,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 718 transitions. [2022-12-13 15:47:36,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 119.66666666666667) internal successors, (718), 6 states have internal predecessors, (718), 0 states have call successors, (0), 0 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 15:47:36,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 15:47:36,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 432.0) internal successors, (3024), 7 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 15:47:36,720 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 121 flow. Second operand 6 states and 718 transitions. [2022-12-13 15:47:36,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 298 flow [2022-12-13 15:47:36,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:47:36,721 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 191 flow [2022-12-13 15:47:36,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2022-12-13 15:47:36,722 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2022-12-13 15:47:36,722 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 191 flow [2022-12-13 15:47:36,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 111.25) internal successors, (890), 8 states have internal predecessors, (890), 0 states have call successors, (0), 0 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 15:47:36,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:36,722 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:47:36,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 15:47:36,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:36,924 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash 431570819, now seen corresponding path program 1 times [2022-12-13 15:47:36,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:36,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955226088] [2022-12-13 15:47:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:36,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:36,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:36,927 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:36,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 15:47:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:37,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:47:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:37,063 INFO L321 Elim1Store]: treesize reduction 17, result has 34.6 percent of original size [2022-12-13 15:47:37,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 15 treesize of output 21 [2022-12-13 15:47:37,103 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-13 15:47:37,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-12-13 15:47:37,191 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 33 treesize of output 31 [2022-12-13 15:47:37,295 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 15:47:37,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:37,697 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 15:47:37,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:37,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955226088] [2022-12-13 15:47:37,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955226088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:37,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:47:37,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 15:47:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303487499] [2022-12-13 15:47:37,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:37,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:47:37,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:47:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=53, Unknown=3, NotChecked=0, Total=90 [2022-12-13 15:47:40,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 432 [2022-12-13 15:47:40,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 191 flow. Second operand has 10 states, 10 states have (on average 111.2) internal successors, (1112), 10 states have internal predecessors, (1112), 0 states have call successors, (0), 0 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 15:47:40,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:40,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 432 [2022-12-13 15:47:40,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:41,658 INFO L130 PetriNetUnfolder]: 171/410 cut-off events. [2022-12-13 15:47:41,658 INFO L131 PetriNetUnfolder]: For 220/220 co-relation queries the response was YES. [2022-12-13 15:47:41,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 410 events. 171/410 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1856 event pairs, 79 based on Foata normal form. 9/419 useless extension candidates. Maximal degree in co-relation 1193. Up to 240 conditions per place. [2022-12-13 15:47:41,660 INFO L137 encePairwiseOnDemand]: 420/432 looper letters, 39 selfloop transitions, 12 changer transitions 12/67 dead transitions. [2022-12-13 15:47:41,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 434 flow [2022-12-13 15:47:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:47:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:47:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 943 transitions. [2022-12-13 15:47:41,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2728587962962963 [2022-12-13 15:47:41,663 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 943 transitions. [2022-12-13 15:47:41,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 943 transitions. [2022-12-13 15:47:41,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:41,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 943 transitions. [2022-12-13 15:47:41,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.875) internal successors, (943), 8 states have internal predecessors, (943), 0 states have call successors, (0), 0 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 15:47:41,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 432.0) internal successors, (3888), 9 states have internal predecessors, (3888), 0 states have call successors, (0), 0 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 15:47:41,667 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 432.0) internal successors, (3888), 9 states have internal predecessors, (3888), 0 states have call successors, (0), 0 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 15:47:41,667 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 191 flow. Second operand 8 states and 943 transitions. [2022-12-13 15:47:41,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 434 flow [2022-12-13 15:47:41,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 429 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:47:41,669 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 253 flow [2022-12-13 15:47:41,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=253, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2022-12-13 15:47:41,670 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2022-12-13 15:47:41,670 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 253 flow [2022-12-13 15:47:41,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.2) internal successors, (1112), 10 states have internal predecessors, (1112), 0 states have call successors, (0), 0 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 15:47:41,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:41,670 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:47:41,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 15:47:41,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:41,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash 459118008, now seen corresponding path program 1 times [2022-12-13 15:47:41,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:41,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084290054] [2022-12-13 15:47:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:41,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:41,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:41,874 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:41,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 15:47:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 15:47:41,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:42,017 INFO L321 Elim1Store]: treesize reduction 17, result has 34.6 percent of original size [2022-12-13 15:47:42,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 15 treesize of output 21 [2022-12-13 15:47:42,033 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 15:47:42,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2022-12-13 15:47:42,060 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 26 treesize of output 26 [2022-12-13 15:47:42,129 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 15:47:42,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:42,346 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 15:47:42,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:47:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084290054] [2022-12-13 15:47:42,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084290054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:42,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:47:42,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:47:42,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507191881] [2022-12-13 15:47:42,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:42,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:47:42,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:47:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:47:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=35, Unknown=1, NotChecked=0, Total=56 [2022-12-13 15:47:43,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 432 [2022-12-13 15:47:43,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 106.5) internal successors, (852), 8 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:43,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:43,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 432 [2022-12-13 15:47:43,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:44,112 INFO L130 PetriNetUnfolder]: 169/398 cut-off events. [2022-12-13 15:47:44,112 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-12-13 15:47:44,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 398 events. 169/398 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1741 event pairs, 44 based on Foata normal form. 19/417 useless extension candidates. Maximal degree in co-relation 1362. Up to 175 conditions per place. [2022-12-13 15:47:44,114 INFO L137 encePairwiseOnDemand]: 419/432 looper letters, 36 selfloop transitions, 18 changer transitions 8/66 dead transitions. [2022-12-13 15:47:44,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 491 flow [2022-12-13 15:47:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:47:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:47:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 795 transitions. [2022-12-13 15:47:44,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2628968253968254 [2022-12-13 15:47:44,118 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 795 transitions. [2022-12-13 15:47:44,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 795 transitions. [2022-12-13 15:47:44,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:44,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 795 transitions. [2022-12-13 15:47:44,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.57142857142857) internal successors, (795), 7 states have internal predecessors, (795), 0 states have call successors, (0), 0 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 15:47:44,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 432.0) internal successors, (3456), 8 states have internal predecessors, (3456), 0 states have call successors, (0), 0 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 15:47:44,126 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 432.0) internal successors, (3456), 8 states have internal predecessors, (3456), 0 states have call successors, (0), 0 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 15:47:44,126 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 253 flow. Second operand 7 states and 795 transitions. [2022-12-13 15:47:44,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 491 flow [2022-12-13 15:47:44,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 486 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:47:44,129 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 337 flow [2022-12-13 15:47:44,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=64, PETRI_TRANSITIONS=42} [2022-12-13 15:47:44,129 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2022-12-13 15:47:44,129 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 337 flow [2022-12-13 15:47:44,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.5) internal successors, (852), 8 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:44,130 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:44,130 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 15:47:44,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-12-13 15:47:44,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:44,331 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 15:47:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash 459118926, now seen corresponding path program 1 times [2022-12-13 15:47:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:47:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301594614] [2022-12-13 15:47:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:44,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:47:44,336 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:47:44,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 15:47:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:47:44,464 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:47:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:47:44,536 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 15:47:44,537 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:47:44,537 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-12-13 15:47:44,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (31 of 33 remaining) [2022-12-13 15:47:44,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2022-12-13 15:47:44,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK (2 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 33 remaining) [2022-12-13 15:47:44,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 33 remaining) [2022-12-13 15:47:44,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 15:47:44,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:47:44,741 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:44,746 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:47:44,746 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 15:47:44,788 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-12-13 15:47:44,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 223 transitions, 494 flow [2022-12-13 15:47:44,873 INFO L130 PetriNetUnfolder]: 149/1323 cut-off events. [2022-12-13 15:47:44,874 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-13 15:47:44,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1323 events. 149/1323 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7711 event pairs, 1 based on Foata normal form. 0/977 useless extension candidates. Maximal degree in co-relation 771. Up to 32 conditions per place. [2022-12-13 15:47:44,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 223 transitions, 494 flow [2022-12-13 15:47:44,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 223 transitions, 494 flow [2022-12-13 15:47:44,879 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:47:44,879 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 223 transitions, 494 flow [2022-12-13 15:47:44,879 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 223 transitions, 494 flow [2022-12-13 15:47:44,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 223 transitions, 494 flow [2022-12-13 15:47:44,984 INFO L130 PetriNetUnfolder]: 149/1323 cut-off events. [2022-12-13 15:47:44,984 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-13 15:47:44,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1323 events. 149/1323 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7711 event pairs, 1 based on Foata normal form. 0/977 useless extension candidates. Maximal degree in co-relation 771. Up to 32 conditions per place. [2022-12-13 15:47:44,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 6052 [2022-12-13 15:48:19,540 WARN L233 SmtUtils]: Spent 11.10s on a formula simplification. DAG size of input: 200 DAG size of output: 192 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 15:48:25,116 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification that was a NOOP. DAG size: 192 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 15:48:40,399 WARN L233 SmtUtils]: Spent 15.28s on a formula simplification. DAG size of input: 213 DAG size of output: 199 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 15:48:47,220 WARN L233 SmtUtils]: Spent 6.82s on a formula simplification that was a NOOP. DAG size: 199 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 15:48:47,223 INFO L134 LiptonReduction]: Checked pairs total: 11648 [2022-12-13 15:48:47,223 INFO L136 LiptonReduction]: Total number of compositions: 240 [2022-12-13 15:48:47,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:48:47,225 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7a42e7f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:48:47,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-13 15:48:47,226 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 15:48:47,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:48:47,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:48:47,226 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 15:48:47,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:48:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:47,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1219, now seen corresponding path program 1 times [2022-12-13 15:48:47,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:48:47,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160129524] [2022-12-13 15:48:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:47,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:47,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:48:47,228 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:48:47,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 15:48:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 15:48:47,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:47,262 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 15:48:47,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:47,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:48:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160129524] [2022-12-13 15:48:47,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160129524] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:47,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:47,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 15:48:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770623624] [2022-12-13 15:48:47,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:47,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:48:47,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:48:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:48:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:48:47,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 463 [2022-12-13 15:48:47,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 197.5) internal successors, (395), 2 states have internal predecessors, (395), 0 states have call successors, (0), 0 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 15:48:47,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:48:47,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 463 [2022-12-13 15:48:47,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:48:48,322 INFO L130 PetriNetUnfolder]: 7901/12655 cut-off events. [2022-12-13 15:48:48,322 INFO L131 PetriNetUnfolder]: For 1006/1006 co-relation queries the response was YES. [2022-12-13 15:48:48,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25082 conditions, 12655 events. 7901/12655 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 79985 event pairs, 7485 based on Foata normal form. 0/8150 useless extension candidates. Maximal degree in co-relation 7783. Up to 11708 conditions per place. [2022-12-13 15:48:48,390 INFO L137 encePairwiseOnDemand]: 451/463 looper letters, 42 selfloop transitions, 0 changer transitions 0/56 dead transitions. [2022-12-13 15:48:48,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 244 flow [2022-12-13 15:48:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:48:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 15:48:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 448 transitions. [2022-12-13 15:48:48,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4838012958963283 [2022-12-13 15:48:48,392 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 448 transitions. [2022-12-13 15:48:48,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 448 transitions. [2022-12-13 15:48:48,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:48:48,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 448 transitions. [2022-12-13 15:48:48,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 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 15:48:48,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 463.0) internal successors, (1389), 3 states have internal predecessors, (1389), 0 states have call successors, (0), 0 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 15:48:48,395 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 463.0) internal successors, (1389), 3 states have internal predecessors, (1389), 0 states have call successors, (0), 0 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 15:48:48,395 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 184 flow. Second operand 2 states and 448 transitions. [2022-12-13 15:48:48,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 244 flow [2022-12-13 15:48:48,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:48:48,397 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 160 flow [2022-12-13 15:48:48,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=160, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2022-12-13 15:48:48,397 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -11 predicate places. [2022-12-13 15:48:48,397 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 160 flow [2022-12-13 15:48:48,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 197.5) internal successors, (395), 2 states have internal predecessors, (395), 0 states have call successors, (0), 0 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 15:48:48,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:48:48,398 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:48:48,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 15:48:48,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:48,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:48:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:48,600 INFO L85 PathProgramCache]: Analyzing trace with hash 38929, now seen corresponding path program 1 times [2022-12-13 15:48:48,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:48:48,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341690291] [2022-12-13 15:48:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:48,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:48,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:48:48,606 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:48:48,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 15:48:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:48:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:48,756 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-12-13 15:48:48,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-12-13 15:48:48,773 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 15:48:48,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:48,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:48:48,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341690291] [2022-12-13 15:48:48,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341690291] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:48,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:48,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:48:48,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118566977] [2022-12-13 15:48:48,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:48:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:48,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 463 [2022-12-13 15:48:48,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 15:48:48,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:48:48,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 463 [2022-12-13 15:48:48,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:48:49,872 INFO L130 PetriNetUnfolder]: 7901/12532 cut-off events. [2022-12-13 15:48:49,872 INFO L131 PetriNetUnfolder]: For 1006/1006 co-relation queries the response was YES. [2022-12-13 15:48:49,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24960 conditions, 12532 events. 7901/12532 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 78580 event pairs, 6461 based on Foata normal form. 0/8150 useless extension candidates. Maximal degree in co-relation 24953. Up to 10171 conditions per place. [2022-12-13 15:48:49,920 INFO L137 encePairwiseOnDemand]: 458/463 looper letters, 47 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2022-12-13 15:48:49,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 272 flow [2022-12-13 15:48:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:48:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2022-12-13 15:48:49,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4478041756659467 [2022-12-13 15:48:49,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2022-12-13 15:48:49,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2022-12-13 15:48:49,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:48:49,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2022-12-13 15:48:49,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 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 15:48:49,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:49,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:49,924 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 160 flow. Second operand 3 states and 622 transitions. [2022-12-13 15:48:49,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 272 flow [2022-12-13 15:48:49,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:48:49,926 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 162 flow [2022-12-13 15:48:49,926 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2022-12-13 15:48:49,926 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -11 predicate places. [2022-12-13 15:48:49,926 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 162 flow [2022-12-13 15:48:49,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 15:48:49,927 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:48:49,927 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:48:49,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 15:48:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:50,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:48:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash 38930, now seen corresponding path program 1 times [2022-12-13 15:48:50,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:48:50,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434381691] [2022-12-13 15:48:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:50,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:48:50,131 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:48:50,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 15:48:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:48:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:48:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:48:50,283 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:48:50,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2022-12-13 15:48:50,313 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-13 15:48:50,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-12-13 15:48:50,348 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 15:48:50,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:50,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:48:50,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434381691] [2022-12-13 15:48:50,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434381691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:50,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:50,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:48:50,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651971603] [2022-12-13 15:48:50,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:50,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:50,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:48:50,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:50,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:50,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 463 [2022-12-13 15:48:50,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 15:48:50,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:48:50,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 463 [2022-12-13 15:48:50,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:48:51,465 INFO L130 PetriNetUnfolder]: 7901/12409 cut-off events. [2022-12-13 15:48:51,465 INFO L131 PetriNetUnfolder]: For 1144/1144 co-relation queries the response was YES. [2022-12-13 15:48:51,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25351 conditions, 12409 events. 7901/12409 cut-off events. For 1144/1144 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 76282 event pairs, 7485 based on Foata normal form. 0/8283 useless extension candidates. Maximal degree in co-relation 25343. Up to 11707 conditions per place. [2022-12-13 15:48:51,500 INFO L137 encePairwiseOnDemand]: 460/463 looper letters, 41 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2022-12-13 15:48:51,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 242 flow [2022-12-13 15:48:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:48:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2022-12-13 15:48:51,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44204463642908565 [2022-12-13 15:48:51,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2022-12-13 15:48:51,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2022-12-13 15:48:51,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:48:51,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2022-12-13 15:48:51,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 15:48:51,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:51,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:51,505 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 162 flow. Second operand 3 states and 614 transitions. [2022-12-13 15:48:51,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 242 flow [2022-12-13 15:48:51,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:48:51,517 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 154 flow [2022-12-13 15:48:51,517 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2022-12-13 15:48:51,517 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -13 predicate places. [2022-12-13 15:48:51,517 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 154 flow [2022-12-13 15:48:51,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 15:48:51,518 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:48:51,518 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:48:51,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 15:48:51,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:51,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:48:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:51,719 INFO L85 PathProgramCache]: Analyzing trace with hash 39300, now seen corresponding path program 1 times [2022-12-13 15:48:51,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:48:51,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167630419] [2022-12-13 15:48:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:51,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:51,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:48:51,720 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:48:51,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 15:48:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:51,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 15:48:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:51,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:48:51,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-13 15:48:51,827 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 10 treesize of output 8 [2022-12-13 15:48:51,838 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 15:48:51,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:51,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:48:51,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167630419] [2022-12-13 15:48:51,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167630419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:51,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:51,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:48:51,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418279591] [2022-12-13 15:48:51,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:51,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:51,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:48:51,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:51,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:52,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 463 [2022-12-13 15:48:52,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 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 15:48:52,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:48:52,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 463 [2022-12-13 15:48:52,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:48:53,271 INFO L130 PetriNetUnfolder]: 7902/12464 cut-off events. [2022-12-13 15:48:53,272 INFO L131 PetriNetUnfolder]: For 858/858 co-relation queries the response was YES. [2022-12-13 15:48:53,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24901 conditions, 12464 events. 7902/12464 cut-off events. For 858/858 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 74995 event pairs, 7485 based on Foata normal form. 0/8051 useless extension candidates. Maximal degree in co-relation 24893. Up to 11703 conditions per place. [2022-12-13 15:48:53,304 INFO L137 encePairwiseOnDemand]: 456/463 looper letters, 50 selfloop transitions, 4 changer transitions 3/67 dead transitions. [2022-12-13 15:48:53,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 298 flow [2022-12-13 15:48:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:48:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2022-12-13 15:48:53,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377249820014399 [2022-12-13 15:48:53,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2022-12-13 15:48:53,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2022-12-13 15:48:53,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:48:53,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2022-12-13 15:48:53,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 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 15:48:53,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:53,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:53,308 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 154 flow. Second operand 3 states and 608 transitions. [2022-12-13 15:48:53,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 298 flow [2022-12-13 15:48:53,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:48:53,311 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 183 flow [2022-12-13 15:48:53,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2022-12-13 15:48:53,312 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -11 predicate places. [2022-12-13 15:48:53,312 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 183 flow [2022-12-13 15:48:53,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 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 15:48:53,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:48:53,312 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:48:53,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 15:48:53,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:53,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:48:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash 39299, now seen corresponding path program 1 times [2022-12-13 15:48:53,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:48:53,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868626391] [2022-12-13 15:48:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:53,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:48:53,514 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:48:53,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 15:48:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:53,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:48:53,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:53,602 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 15:48:53,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 19 treesize of output 22 [2022-12-13 15:48:53,606 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 15:48:53,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:53,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:48:53,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868626391] [2022-12-13 15:48:53,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868626391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:53,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:53,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:48:53,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472078097] [2022-12-13 15:48:53,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:53,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:48:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:53,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:53,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 463 [2022-12-13 15:48:53,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 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 15:48:53,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:48:53,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 463 [2022-12-13 15:48:53,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:48:54,613 INFO L130 PetriNetUnfolder]: 7375/11631 cut-off events. [2022-12-13 15:48:54,613 INFO L131 PetriNetUnfolder]: For 1392/1392 co-relation queries the response was YES. [2022-12-13 15:48:54,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24239 conditions, 11631 events. 7375/11631 cut-off events. For 1392/1392 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 70855 event pairs, 5935 based on Foata normal form. 0/8330 useless extension candidates. Maximal degree in co-relation 24230. Up to 9380 conditions per place. [2022-12-13 15:48:54,644 INFO L137 encePairwiseOnDemand]: 458/463 looper letters, 47 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2022-12-13 15:48:54,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 297 flow [2022-12-13 15:48:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:48:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2022-12-13 15:48:54,646 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44204463642908565 [2022-12-13 15:48:54,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2022-12-13 15:48:54,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2022-12-13 15:48:54,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:48:54,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2022-12-13 15:48:54,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 15:48:54,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:54,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:54,648 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 183 flow. Second operand 3 states and 614 transitions. [2022-12-13 15:48:54,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 297 flow [2022-12-13 15:48:54,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:48:54,651 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 183 flow [2022-12-13 15:48:54,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2022-12-13 15:48:54,651 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -12 predicate places. [2022-12-13 15:48:54,651 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 183 flow [2022-12-13 15:48:54,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 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 15:48:54,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:48:54,651 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:48:54,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-12-13 15:48:54,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:54,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:48:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1218302, now seen corresponding path program 1 times [2022-12-13 15:48:54,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:48:54,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038983956] [2022-12-13 15:48:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:54,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:54,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:48:54,857 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:48:54,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 15:48:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:54,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:48:54,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:54,968 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-12-13 15:48:54,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-12-13 15:48:54,984 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 15:48:54,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:54,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:48:54,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038983956] [2022-12-13 15:48:54,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038983956] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:54,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:54,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:48:54,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755394753] [2022-12-13 15:48:54,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:54,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:54,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:48:54,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:54,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:55,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 463 [2022-12-13 15:48:55,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 15:48:55,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:48:55,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 463 [2022-12-13 15:48:55,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:48:55,976 INFO L130 PetriNetUnfolder]: 7375/11477 cut-off events. [2022-12-13 15:48:55,976 INFO L131 PetriNetUnfolder]: For 1785/1785 co-relation queries the response was YES. [2022-12-13 15:48:55,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24596 conditions, 11477 events. 7375/11477 cut-off events. For 1785/1785 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 68496 event pairs, 5935 based on Foata normal form. 0/8330 useless extension candidates. Maximal degree in co-relation 24587. Up to 9380 conditions per place. [2022-12-13 15:48:56,006 INFO L137 encePairwiseOnDemand]: 458/463 looper letters, 47 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2022-12-13 15:48:56,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 297 flow [2022-12-13 15:48:56,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:48:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2022-12-13 15:48:56,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4334053275737941 [2022-12-13 15:48:56,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2022-12-13 15:48:56,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2022-12-13 15:48:56,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:48:56,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2022-12-13 15:48:56,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 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 15:48:56,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:56,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:56,011 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 183 flow. Second operand 3 states and 602 transitions. [2022-12-13 15:48:56,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 297 flow [2022-12-13 15:48:56,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:48:56,022 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 179 flow [2022-12-13 15:48:56,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2022-12-13 15:48:56,023 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -14 predicate places. [2022-12-13 15:48:56,023 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 179 flow [2022-12-13 15:48:56,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 15:48:56,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:48:56,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:48:56,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-13 15:48:56,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:56,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:48:56,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1218303, now seen corresponding path program 1 times [2022-12-13 15:48:56,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:48:56,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967674886] [2022-12-13 15:48:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:56,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:56,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:48:56,230 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:48:56,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 15:48:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:56,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:48:56,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:48:56,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:48:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:48:56,423 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-12-13 15:48:56,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 30 [2022-12-13 15:48:56,452 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-12-13 15:48:56,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-12-13 15:48:56,489 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 15:48:56,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:56,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:48:56,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967674886] [2022-12-13 15:48:56,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967674886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:56,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:56,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:48:56,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184076982] [2022-12-13 15:48:56,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:56,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:56,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:48:56,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:56,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:56,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 463 [2022-12-13 15:48:56,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 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 15:48:56,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:48:56,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 463 [2022-12-13 15:48:56,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:48:57,618 INFO L130 PetriNetUnfolder]: 7375/11323 cut-off events. [2022-12-13 15:48:57,618 INFO L131 PetriNetUnfolder]: For 1785/1785 co-relation queries the response was YES. [2022-12-13 15:48:57,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24442 conditions, 11323 events. 7375/11323 cut-off events. For 1785/1785 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 65797 event pairs, 6959 based on Foata normal form. 0/8176 useless extension candidates. Maximal degree in co-relation 24433. Up to 10917 conditions per place. [2022-12-13 15:48:57,656 INFO L137 encePairwiseOnDemand]: 460/463 looper letters, 42 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2022-12-13 15:48:57,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 261 flow [2022-12-13 15:48:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:48:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2022-12-13 15:48:57,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4406047516198704 [2022-12-13 15:48:57,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2022-12-13 15:48:57,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2022-12-13 15:48:57,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:48:57,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2022-12-13 15:48:57,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 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 15:48:57,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:57,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:57,662 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 179 flow. Second operand 3 states and 612 transitions. [2022-12-13 15:48:57,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 261 flow [2022-12-13 15:48:57,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:48:57,676 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 169 flow [2022-12-13 15:48:57,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2022-12-13 15:48:57,677 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -16 predicate places. [2022-12-13 15:48:57,677 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 169 flow [2022-12-13 15:48:57,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 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 15:48:57,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:48:57,677 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:48:57,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 15:48:57,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:57,878 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:48:57,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1218541, now seen corresponding path program 1 times [2022-12-13 15:48:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:48:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422139161] [2022-12-13 15:48:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:57,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:57,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:48:57,885 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:48:57,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 15:48:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:48:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:57,962 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 15:48:57,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 19 [2022-12-13 15:48:57,968 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 15:48:57,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:57,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:48:57,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422139161] [2022-12-13 15:48:57,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422139161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:57,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:57,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:48:57,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318353166] [2022-12-13 15:48:57,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:57,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:57,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:48:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:58,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 463 [2022-12-13 15:48:58,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:48:58,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:48:58,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 463 [2022-12-13 15:48:58,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:48:59,100 INFO L130 PetriNetUnfolder]: 6499/10021 cut-off events. [2022-12-13 15:48:59,100 INFO L131 PetriNetUnfolder]: For 1392/1392 co-relation queries the response was YES. [2022-12-13 15:48:59,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21325 conditions, 10021 events. 6499/10021 cut-off events. For 1392/1392 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 57885 event pairs, 5059 based on Foata normal form. 0/7519 useless extension candidates. Maximal degree in co-relation 21316. Up to 8078 conditions per place. [2022-12-13 15:48:59,142 INFO L137 encePairwiseOnDemand]: 458/463 looper letters, 45 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2022-12-13 15:48:59,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 279 flow [2022-12-13 15:48:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:48:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2022-12-13 15:48:59,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4406047516198704 [2022-12-13 15:48:59,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2022-12-13 15:48:59,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2022-12-13 15:48:59,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:48:59,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2022-12-13 15:48:59,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 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 15:48:59,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:59,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:48:59,148 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 169 flow. Second operand 3 states and 612 transitions. [2022-12-13 15:48:59,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 279 flow [2022-12-13 15:48:59,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:48:59,152 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 172 flow [2022-12-13 15:48:59,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2022-12-13 15:48:59,153 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -17 predicate places. [2022-12-13 15:48:59,153 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 172 flow [2022-12-13 15:48:59,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:48:59,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:48:59,153 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:48:59,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 15:48:59,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:59,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:48:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1218542, now seen corresponding path program 1 times [2022-12-13 15:48:59,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:48:59,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864530575] [2022-12-13 15:48:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:59,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:48:59,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:48:59,361 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:48:59,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 15:48:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:48:59,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:59,480 INFO L321 Elim1Store]: treesize reduction 17, result has 34.6 percent of original size [2022-12-13 15:48:59,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 15 treesize of output 21 [2022-12-13 15:48:59,513 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 15:48:59,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:59,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:48:59,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864530575] [2022-12-13 15:48:59,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864530575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:59,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:59,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:48:59,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352338682] [2022-12-13 15:48:59,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:59,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:48:59,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:48:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:48:59,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:48:59,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 463 [2022-12-13 15:48:59,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 179.75) internal successors, (719), 4 states have internal predecessors, (719), 0 states have call successors, (0), 0 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 15:48:59,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:48:59,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 463 [2022-12-13 15:48:59,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:49:00,807 INFO L130 PetriNetUnfolder]: 6499/10019 cut-off events. [2022-12-13 15:49:00,807 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2022-12-13 15:49:00,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21835 conditions, 10019 events. 6499/10019 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 56693 event pairs, 6083 based on Foata normal form. 0/7519 useless extension candidates. Maximal degree in co-relation 21826. Up to 9608 conditions per place. [2022-12-13 15:49:00,833 INFO L137 encePairwiseOnDemand]: 457/463 looper letters, 40 selfloop transitions, 4 changer transitions 2/52 dead transitions. [2022-12-13 15:49:00,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 274 flow [2022-12-13 15:49:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:49:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:49:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2022-12-13 15:49:00,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42116630669546434 [2022-12-13 15:49:00,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2022-12-13 15:49:00,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2022-12-13 15:49:00,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:49:00,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2022-12-13 15:49:00,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 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 15:49:00,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:49:00,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:49:00,837 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 172 flow. Second operand 3 states and 585 transitions. [2022-12-13 15:49:00,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 274 flow [2022-12-13 15:49:00,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:49:00,851 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 180 flow [2022-12-13 15:49:00,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-12-13 15:49:00,851 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -16 predicate places. [2022-12-13 15:49:00,851 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 180 flow [2022-12-13 15:49:00,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.75) internal successors, (719), 4 states have internal predecessors, (719), 0 states have call successors, (0), 0 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 15:49:00,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:49:00,852 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:49:00,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 15:49:01,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:01,053 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:49:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:01,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1171064388, now seen corresponding path program 1 times [2022-12-13 15:49:01,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:49:01,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571002106] [2022-12-13 15:49:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:01,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:01,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:49:01,058 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:49:01,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 15:49:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:49:01,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:49:01,228 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 15:49:01,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:49:01,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:49:01,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571002106] [2022-12-13 15:49:01,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571002106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:49:01,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:49:01,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:49:01,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4968430] [2022-12-13 15:49:01,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:49:01,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:49:01,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:49:01,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:49:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:49:01,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 463 [2022-12-13 15:49:01,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 15:49:01,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:49:01,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 463 [2022-12-13 15:49:01,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:49:02,192 INFO L130 PetriNetUnfolder]: 5986/9250 cut-off events. [2022-12-13 15:49:02,192 INFO L131 PetriNetUnfolder]: For 1658/1658 co-relation queries the response was YES. [2022-12-13 15:49:02,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19956 conditions, 9250 events. 5986/9250 cut-off events. For 1658/1658 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 52643 event pairs, 5059 based on Foata normal form. 1/7559 useless extension candidates. Maximal degree in co-relation 19946. Up to 8076 conditions per place. [2022-12-13 15:49:02,223 INFO L137 encePairwiseOnDemand]: 460/463 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2022-12-13 15:49:02,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 279 flow [2022-12-13 15:49:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:49:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:49:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2022-12-13 15:49:02,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326853851691865 [2022-12-13 15:49:02,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2022-12-13 15:49:02,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2022-12-13 15:49:02,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:49:02,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2022-12-13 15:49:02,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 15:49:02,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:49:02,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:49:02,228 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 180 flow. Second operand 3 states and 601 transitions. [2022-12-13 15:49:02,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 279 flow [2022-12-13 15:49:02,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 273 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:49:02,233 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 167 flow [2022-12-13 15:49:02,233 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2022-12-13 15:49:02,233 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -17 predicate places. [2022-12-13 15:49:02,233 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 167 flow [2022-12-13 15:49:02,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 15:49:02,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:49:02,233 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:49:02,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 15:49:02,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:02,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:49:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1171050398, now seen corresponding path program 1 times [2022-12-13 15:49:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:49:02,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255086890] [2022-12-13 15:49:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:02,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:49:02,440 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:49:02,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 15:49:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:49:02,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:49:02,585 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 15:49:02,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:49:02,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:49:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255086890] [2022-12-13 15:49:02,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255086890] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:49:02,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:49:02,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:49:02,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904221434] [2022-12-13 15:49:02,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:49:02,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:49:02,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:49:02,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:49:02,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:49:02,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 463 [2022-12-13 15:49:02,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:49:02,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:49:02,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 463 [2022-12-13 15:49:02,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:49:03,302 INFO L130 PetriNetUnfolder]: 5797/8888 cut-off events. [2022-12-13 15:49:03,303 INFO L131 PetriNetUnfolder]: For 2579/2579 co-relation queries the response was YES. [2022-12-13 15:49:03,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19665 conditions, 8888 events. 5797/8888 cut-off events. For 2579/2579 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 49781 event pairs, 1890 based on Foata normal form. 0/7331 useless extension candidates. Maximal degree in co-relation 19655. Up to 8146 conditions per place. [2022-12-13 15:49:03,332 INFO L137 encePairwiseOnDemand]: 458/463 looper letters, 63 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2022-12-13 15:49:03,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 72 transitions, 394 flow [2022-12-13 15:49:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:49:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:49:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2022-12-13 15:49:03,335 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46004319654427644 [2022-12-13 15:49:03,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2022-12-13 15:49:03,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2022-12-13 15:49:03,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:49:03,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2022-12-13 15:49:03,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 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 15:49:03,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:49:03,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 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 15:49:03,337 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 167 flow. Second operand 3 states and 639 transitions. [2022-12-13 15:49:03,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 72 transitions, 394 flow [2022-12-13 15:49:03,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:49:03,348 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 184 flow [2022-12-13 15:49:03,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-12-13 15:49:03,349 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -16 predicate places. [2022-12-13 15:49:03,349 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 184 flow [2022-12-13 15:49:03,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:49:03,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:49:03,349 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:49:03,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-13 15:49:03,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:03,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:49:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1961821630, now seen corresponding path program 1 times [2022-12-13 15:49:03,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:49:03,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104695827] [2022-12-13 15:49:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:03,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:49:03,555 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:49:03,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 15:49:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:03,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:49:03,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:49:03,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:49:03,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-13 15:49:03,703 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-13 15:49:03,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-12-13 15:49:03,744 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 33 treesize of output 31 [2022-12-13 15:49:03,851 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 15:49:03,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:49:04,150 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 15:49:04,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:49:04,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104695827] [2022-12-13 15:49:04,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104695827] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:49:04,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:49:04,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:49:04,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154042034] [2022-12-13 15:49:04,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:49:04,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:49:04,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:49:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:49:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=31, Unknown=2, NotChecked=0, Total=56 [2022-12-13 15:49:06,136 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 463 [2022-12-13 15:49:06,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 123.25) internal successors, (986), 8 states have internal predecessors, (986), 0 states have call successors, (0), 0 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 15:49:06,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:49:06,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 463 [2022-12-13 15:49:06,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:49:08,014 INFO L130 PetriNetUnfolder]: 5785/9103 cut-off events. [2022-12-13 15:49:08,014 INFO L131 PetriNetUnfolder]: For 3558/3558 co-relation queries the response was YES. [2022-12-13 15:49:08,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22547 conditions, 9103 events. 5785/9103 cut-off events. For 3558/3558 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 53631 event pairs, 2110 based on Foata normal form. 4/8827 useless extension candidates. Maximal degree in co-relation 22536. Up to 7203 conditions per place. [2022-12-13 15:49:08,047 INFO L137 encePairwiseOnDemand]: 451/463 looper letters, 70 selfloop transitions, 14 changer transitions 7/97 dead transitions. [2022-12-13 15:49:08,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 97 transitions, 527 flow [2022-12-13 15:49:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:49:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:49:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1062 transitions. [2022-12-13 15:49:08,051 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2867170626349892 [2022-12-13 15:49:08,051 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1062 transitions. [2022-12-13 15:49:08,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1062 transitions. [2022-12-13 15:49:08,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:49:08,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1062 transitions. [2022-12-13 15:49:08,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.75) internal successors, (1062), 8 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 15:49:08,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 463.0) internal successors, (4167), 9 states have internal predecessors, (4167), 0 states have call successors, (0), 0 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 15:49:08,055 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 463.0) internal successors, (4167), 9 states have internal predecessors, (4167), 0 states have call successors, (0), 0 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 15:49:08,055 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 184 flow. Second operand 8 states and 1062 transitions. [2022-12-13 15:49:08,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 97 transitions, 527 flow [2022-12-13 15:49:08,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 97 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:49:08,059 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 276 flow [2022-12-13 15:49:08,059 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=276, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2022-12-13 15:49:08,060 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2022-12-13 15:49:08,060 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 276 flow [2022-12-13 15:49:08,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 123.25) internal successors, (986), 8 states have internal predecessors, (986), 0 states have call successors, (0), 0 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 15:49:08,060 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:49:08,060 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:49:08,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-13 15:49:08,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:08,261 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:49:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash 97786152, now seen corresponding path program 1 times [2022-12-13 15:49:08,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:49:08,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293271734] [2022-12-13 15:49:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:08,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:49:08,262 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:49:08,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-13 15:49:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:08,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:49:08,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:49:08,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:49:08,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-13 15:49:08,396 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-13 15:49:08,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-12-13 15:49:08,466 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 33 treesize of output 31 [2022-12-13 15:49:08,591 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 15:49:08,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:49:09,008 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 15:49:09,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:49:09,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293271734] [2022-12-13 15:49:09,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293271734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:49:09,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:49:09,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 15:49:09,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408735290] [2022-12-13 15:49:09,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:49:09,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:49:09,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:49:09,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:49:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=53, Unknown=3, NotChecked=0, Total=90 [2022-12-13 15:49:13,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 463 [2022-12-13 15:49:13,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 276 flow. Second operand has 10 states, 10 states have (on average 122.2) internal successors, (1222), 10 states have internal predecessors, (1222), 0 states have call successors, (0), 0 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 15:49:13,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:49:13,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 463 [2022-12-13 15:49:13,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:49:17,397 INFO L130 PetriNetUnfolder]: 5812/9240 cut-off events. [2022-12-13 15:49:17,397 INFO L131 PetriNetUnfolder]: For 5564/5564 co-relation queries the response was YES. [2022-12-13 15:49:17,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25199 conditions, 9240 events. 5812/9240 cut-off events. For 5564/5564 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 55864 event pairs, 2146 based on Foata normal form. 27/9265 useless extension candidates. Maximal degree in co-relation 25183. Up to 5604 conditions per place. [2022-12-13 15:49:17,424 INFO L137 encePairwiseOnDemand]: 450/463 looper letters, 82 selfloop transitions, 18 changer transitions 26/132 dead transitions. [2022-12-13 15:49:17,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 132 transitions, 847 flow [2022-12-13 15:49:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:49:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:49:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1450 transitions. [2022-12-13 15:49:17,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28470449636756334 [2022-12-13 15:49:17,428 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1450 transitions. [2022-12-13 15:49:17,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1450 transitions. [2022-12-13 15:49:17,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:49:17,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1450 transitions. [2022-12-13 15:49:17,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 131.8181818181818) internal successors, (1450), 11 states have internal predecessors, (1450), 0 states have call successors, (0), 0 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 15:49:17,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 463.0) internal successors, (5556), 12 states have internal predecessors, (5556), 0 states have call successors, (0), 0 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 15:49:17,434 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 463.0) internal successors, (5556), 12 states have internal predecessors, (5556), 0 states have call successors, (0), 0 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 15:49:17,434 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 276 flow. Second operand 11 states and 1450 transitions. [2022-12-13 15:49:17,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 132 transitions, 847 flow [2022-12-13 15:49:17,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 132 transitions, 840 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 15:49:17,445 INFO L231 Difference]: Finished difference. Result has 80 places, 64 transitions, 398 flow [2022-12-13 15:49:17,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=398, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2022-12-13 15:49:17,445 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 11 predicate places. [2022-12-13 15:49:17,445 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 398 flow [2022-12-13 15:49:17,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 122.2) internal successors, (1222), 10 states have internal predecessors, (1222), 0 states have call successors, (0), 0 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 15:49:17,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:49:17,445 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:49:17,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-12-13 15:49:17,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:17,646 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:49:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash 686928628, now seen corresponding path program 1 times [2022-12-13 15:49:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:49:17,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111364782] [2022-12-13 15:49:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:17,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:17,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:49:17,652 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:49:17,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-13 15:49:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:17,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:49:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:49:17,866 INFO L321 Elim1Store]: treesize reduction 17, result has 34.6 percent of original size [2022-12-13 15:49:17,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 15 treesize of output 21 [2022-12-13 15:49:17,877 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 15:49:17,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2022-12-13 15:49:17,902 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 26 treesize of output 26 [2022-12-13 15:49:17,956 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 15:49:17,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:49:18,173 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 15:49:18,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:49:18,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111364782] [2022-12-13 15:49:18,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111364782] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:49:18,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:49:18,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:49:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482639237] [2022-12-13 15:49:18,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:49:18,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:49:18,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:49:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:49:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=35, Unknown=1, NotChecked=0, Total=56 [2022-12-13 15:49:20,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 463 [2022-12-13 15:49:20,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 398 flow. Second operand has 8 states, 8 states have (on average 118.5) internal successors, (948), 8 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 15:49:20,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:49:20,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 463 [2022-12-13 15:49:20,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:49:22,620 INFO L130 PetriNetUnfolder]: 6706/10794 cut-off events. [2022-12-13 15:49:22,620 INFO L131 PetriNetUnfolder]: For 16110/16110 co-relation queries the response was YES. [2022-12-13 15:49:22,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35729 conditions, 10794 events. 6706/10794 cut-off events. For 16110/16110 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 66327 event pairs, 683 based on Foata normal form. 102/10882 useless extension candidates. Maximal degree in co-relation 35706. Up to 5302 conditions per place. [2022-12-13 15:49:22,676 INFO L137 encePairwiseOnDemand]: 450/463 looper letters, 117 selfloop transitions, 33 changer transitions 17/173 dead transitions. [2022-12-13 15:49:22,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 173 transitions, 1327 flow [2022-12-13 15:49:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:49:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:49:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1191 transitions. [2022-12-13 15:49:22,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28581713462922964 [2022-12-13 15:49:22,680 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1191 transitions. [2022-12-13 15:49:22,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1191 transitions. [2022-12-13 15:49:22,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:49:22,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1191 transitions. [2022-12-13 15:49:22,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.33333333333334) internal successors, (1191), 9 states have internal predecessors, (1191), 0 states have call successors, (0), 0 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 15:49:22,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 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 15:49:22,685 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 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 15:49:22,685 INFO L175 Difference]: Start difference. First operand has 80 places, 64 transitions, 398 flow. Second operand 9 states and 1191 transitions. [2022-12-13 15:49:22,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 173 transitions, 1327 flow [2022-12-13 15:49:22,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 173 transitions, 1278 flow, removed 23 selfloop flow, removed 1 redundant places. [2022-12-13 15:49:22,904 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 636 flow [2022-12-13 15:49:22,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=636, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2022-12-13 15:49:22,904 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 22 predicate places. [2022-12-13 15:49:22,904 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 636 flow [2022-12-13 15:49:22,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 118.5) internal successors, (948), 8 states have internal predecessors, (948), 0 states have call successors, (0), 0 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 15:49:22,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:49:22,905 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:49:22,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-13 15:49:23,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:23,106 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:49:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1263595158, now seen corresponding path program 1 times [2022-12-13 15:49:23,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:49:23,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976039897] [2022-12-13 15:49:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:23,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:49:23,113 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:49:23,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-13 15:49:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:23,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 15:49:23,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:49:23,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 15:49:23,262 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 6 treesize of output 5 [2022-12-13 15:49:23,270 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 15:49:23,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 17 [2022-12-13 15:49:23,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-13 15:49:23,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-12-13 15:49:23,448 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 15:49:23,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:49:23,784 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 15:49:23,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:49:23,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976039897] [2022-12-13 15:49:23,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976039897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:49:23,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:49:23,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 15:49:23,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321891104] [2022-12-13 15:49:23,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:49:23,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:49:23,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:49:23,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:49:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=59, Unknown=1, NotChecked=0, Total=90 [2022-12-13 15:49:25,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 463 [2022-12-13 15:49:25,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 636 flow. Second operand has 10 states, 10 states have (on average 118.4) internal successors, (1184), 10 states have internal predecessors, (1184), 0 states have call successors, (0), 0 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 15:49:25,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:49:25,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 463 [2022-12-13 15:49:25,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:49:29,471 INFO L130 PetriNetUnfolder]: 6695/10823 cut-off events. [2022-12-13 15:49:29,471 INFO L131 PetriNetUnfolder]: For 30149/30149 co-relation queries the response was YES. [2022-12-13 15:49:29,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39103 conditions, 10823 events. 6695/10823 cut-off events. For 30149/30149 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 67501 event pairs, 1998 based on Foata normal form. 20/10841 useless extension candidates. Maximal degree in co-relation 39075. Up to 7294 conditions per place. [2022-12-13 15:49:29,529 INFO L137 encePairwiseOnDemand]: 450/463 looper letters, 114 selfloop transitions, 29 changer transitions 5/154 dead transitions. [2022-12-13 15:49:29,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 154 transitions, 1317 flow [2022-12-13 15:49:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:49:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:49:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1880 transitions. [2022-12-13 15:49:29,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2706983441324694 [2022-12-13 15:49:29,533 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1880 transitions. [2022-12-13 15:49:29,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1880 transitions. [2022-12-13 15:49:29,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:49:29,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1880 transitions. [2022-12-13 15:49:29,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 125.33333333333333) internal successors, (1880), 15 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 15:49:29,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 463.0) internal successors, (7408), 16 states have internal predecessors, (7408), 0 states have call successors, (0), 0 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 15:49:29,540 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 463.0) internal successors, (7408), 16 states have internal predecessors, (7408), 0 states have call successors, (0), 0 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 15:49:29,540 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 636 flow. Second operand 15 states and 1880 transitions. [2022-12-13 15:49:29,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 154 transitions, 1317 flow [2022-12-13 15:49:29,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 1194 flow, removed 46 selfloop flow, removed 7 redundant places. [2022-12-13 15:49:29,696 INFO L231 Difference]: Finished difference. Result has 98 places, 84 transitions, 677 flow [2022-12-13 15:49:29,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=677, PETRI_PLACES=98, PETRI_TRANSITIONS=84} [2022-12-13 15:49:29,697 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 29 predicate places. [2022-12-13 15:49:29,697 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 84 transitions, 677 flow [2022-12-13 15:49:29,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 118.4) internal successors, (1184), 10 states have internal predecessors, (1184), 0 states have call successors, (0), 0 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 15:49:29,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:49:29,697 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:49:29,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-13 15:49:29,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:29,898 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 15:49:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1230170382, now seen corresponding path program 1 times [2022-12-13 15:49:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:49:29,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270309397] [2022-12-13 15:49:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:29,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:29,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:49:29,904 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:49:29,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-13 15:49:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:49:30,046 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:49:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:49:30,128 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 15:49:30,128 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:49:30,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (33 of 34 remaining) [2022-12-13 15:49:30,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (32 of 34 remaining) [2022-12-13 15:49:30,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2022-12-13 15:49:30,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2022-12-13 15:49:30,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2022-12-13 15:49:30,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2022-12-13 15:49:30,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK (3 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 34 remaining) [2022-12-13 15:49:30,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 34 remaining) [2022-12-13 15:49:30,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-12-13 15:49:30,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:49:30,331 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:49:30,338 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2022-12-13 15:49:30,338 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 15:49:30,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 03:49:30 BasicIcfg [2022-12-13 15:49:30,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 15:49:30,367 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 15:49:30,367 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 15:49:30,367 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 15:49:30,367 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:46:51" (3/4) ... [2022-12-13 15:49:30,369 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 15:49:30,369 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 15:49:30,369 INFO L158 Benchmark]: Toolchain (without parser) took 159978.92ms. Allocated memory was 69.2MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 43.5MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2022-12-13 15:49:30,370 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 54.5MB. Free memory is still 33.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:49:30,370 INFO L158 Benchmark]: CACSL2BoogieTranslator took 546.99ms. Allocated memory is still 69.2MB. Free memory was 43.3MB in the beginning and 36.5MB in the end (delta: 6.9MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2022-12-13 15:49:30,370 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.63ms. Allocated memory is still 69.2MB. Free memory was 36.2MB in the beginning and 33.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 15:49:30,370 INFO L158 Benchmark]: Boogie Preprocessor took 29.20ms. Allocated memory is still 69.2MB. Free memory was 33.5MB in the beginning and 31.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 15:49:30,370 INFO L158 Benchmark]: RCFGBuilder took 600.06ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 31.4MB in the beginning and 37.5MB in the end (delta: -6.1MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. [2022-12-13 15:49:30,370 INFO L158 Benchmark]: TraceAbstraction took 158759.88ms. Allocated memory was 83.9MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 37.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2022-12-13 15:49:30,370 INFO L158 Benchmark]: Witness Printer took 2.37ms. Allocated memory is still 2.2GB. Free memory is still 1.1GB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:49:30,371 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 54.5MB. Free memory is still 33.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 546.99ms. Allocated memory is still 69.2MB. Free memory was 43.3MB in the beginning and 36.5MB in the end (delta: 6.9MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.63ms. Allocated memory is still 69.2MB. Free memory was 36.2MB in the beginning and 33.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.20ms. Allocated memory is still 69.2MB. Free memory was 33.5MB in the beginning and 31.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 600.06ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 31.4MB in the beginning and 37.5MB in the end (delta: -6.1MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. * TraceAbstraction took 158759.88ms. Allocated memory was 83.9MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 37.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Witness Printer took 2.37ms. Allocated memory is still 2.2GB. Free memory is still 1.1GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 34.5s, 191 PlacesBefore, 57 PlacesAfterwards, 203 TransitionsBefore, 56 TransitionsAfterwards, 2694 CoEnabledTransitionPairs, 7 FixpointIterations, 100 TrivialSequentialCompositions, 93 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 13 ChoiceCompositions, 229 TotalNumberOfCompositions, 4251 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3108, independent: 3070, independent conditional: 0, independent unconditional: 3070, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1539, independent: 1532, independent conditional: 0, independent unconditional: 1532, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3108, independent: 1538, independent conditional: 0, independent unconditional: 1538, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 1539, unknown conditional: 0, unknown unconditional: 1539] , Statistics on independence cache: Total cache size (in pairs): 53, Positive cache size: 50, Positive conditional cache size: 0, Positive unconditional cache size: 50, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 62.3s, 210 PlacesBefore, 69 PlacesAfterwards, 223 TransitionsBefore, 68 TransitionsAfterwards, 6052 CoEnabledTransitionPairs, 7 FixpointIterations, 100 TrivialSequentialCompositions, 100 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 26 ConcurrentYvCompositions, 14 ChoiceCompositions, 240 TotalNumberOfCompositions, 11648 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7971, independent: 7892, independent conditional: 0, independent unconditional: 7892, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3512, independent: 3495, independent conditional: 0, independent unconditional: 3495, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7971, independent: 4397, independent conditional: 0, independent unconditional: 4397, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 3512, unknown conditional: 0, unknown unconditional: 3512] , Statistics on independence cache: Total cache size (in pairs): 160, Positive cache size: 155, Positive conditional cache size: 0, Positive unconditional cache size: 155, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1295]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1295. Possible FailurePath: [L1236] 0 static int iSet = 2; [L1237] 0 static int iCheck = 2; [L1238] 0 static int a = 0; [L1239] 0 static int b = 0; [L1245] 0 int i, err; [L1246] COND TRUE 0 argc != 1 [L1247] COND FALSE 0 !(argc != 3) [L1255] EXPR 0 \read(iSet) [L1255] 0 iSet > 100000 || iCheck > 100000 [L1255] EXPR 0 \read(iCheck) [L1255] 0 iSet > 100000 || iCheck > 100000 [L1255] COND FALSE 0 !(iSet > 100000 || iCheck > 100000) [L1258] EXPR 0 \read(iSet) [L1258] 0 pthread_t setPool[iSet]; [L1259] EXPR 0 \read(iCheck) [L1259] 0 pthread_t checkPool[iCheck]; [L1260] 0 i = 0 VAL [\old(argc)=3, \read(iCheck)=2, \read(iSet)=1, a=0, argc=3, argv={14:13}, argv={14:13}, b=0, checkPool={15:0}, fprintf(stderr, "./reorder \n")=16, i=0, iCheck={10:0}, iSet={9:0}, setPool={27:0}] [L1260] EXPR 0 \read(iSet) [L1260] COND TRUE 0 i < iSet [L1261] EXPR, FCALL, FORK 0 pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)) VAL [\old(argc)=3, \read(iCheck)=2, \read(iSet)=1, a=0, argc=3, argv={14:13}, argv={14:13}, b=0, checkPool={15:0}, fprintf(stderr, "./reorder \n")=16, i=0, iCheck={10:0}, iSet={9:0}, param={0:0}, pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0))=8388608, setPool={27:0}] [L1261] EXPR 0 err = pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)) VAL [\old(argc)=3, \read(iCheck)=2, \read(iSet)=1, a=0, argc=3, argv={14:13}, argv={14:13}, b=0, checkPool={15:0}, err=0, fprintf(stderr, "./reorder \n")=16, i=0, iCheck={10:0}, iSet={9:0}, param={0:0}, pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0))=0, pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0))=8388608, setPool={27:0}] [L1261] COND FALSE 0 !(0 != (err = pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)))) [L1260] 0 i++ VAL [\old(argc)=3, \read(iCheck)=2, \read(iSet)=1, a=0, argc=3, argv={14:13}, argv={14:13}, b=0, checkPool={15:0}, err=0, fprintf(stderr, "./reorder \n")=16, fprintf(stderr, "Error [%d] found creating set thread.\n", err)=17, i=1, iCheck={10:0}, iSet={9:0}, param={0:0}, setPool={27:0}] [L1260] EXPR 0 \read(iSet) [L1260] COND FALSE 0 !(i < iSet) [L1266] 0 i = 0 VAL [\old(argc)=3, \read(iCheck)=2, \read(iSet)=1, a=0, argc=3, argv={14:13}, argv={14:13}, b=0, checkPool={15:0}, err=0, fprintf(stderr, "./reorder \n")=16, fprintf(stderr, "Error [%d] found creating set thread.\n", err)=17, i=0, iCheck={10:0}, iSet={9:0}, param={0:0}, setPool={27:0}] [L1288] 1 a = 1 VAL [a=1, b=0, iCheck={10:0}, iSet={9:0}, param={0:0}, param={0:0}] [L1266] EXPR 0 \read(iCheck) [L1266] COND TRUE 0 i < iCheck [L1267-L1268] FCALL, FORK 0 pthread_create(&checkPool[i], ((void *)0), &checkThread, ((void *)0)) VAL [\old(argc)=3, \read(iCheck)=2, \read(iSet)=1, a=1, argc=3, argv={14:13}, argv={14:13}, b=0, checkPool={15:0}, err=0, fprintf(stderr, "./reorder \n")=16, fprintf(stderr, "Error [%d] found creating set thread.\n", err)=17, i=0, iCheck={10:0}, iSet={9:0}, param={0:0}, param={0:0}, param={0:0}, pthread_create(&checkPool[i], ((void *)0), &checkThread, ((void *)0))=8388609, setPool={27:0}] [L1293] COND TRUE 2 ! ((a == 0 && b == 0) || (a == 1 && b == -1)) [L1295] 2 reach_error() VAL [a=1, b=0, iCheck={10:0}, iSet={9:0}, param={0:0}, param={0:0}, param={0:0}, param={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1244]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1261]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1267]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 202 locations, 33 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 53.0s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 11.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 34.6s, HoareTripleCheckerStatistics: 188 mSolverCounterUnknown, 2445 SdHoareTripleChecker+Valid, 10.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1432 mSDsluCounter, 180 SdHoareTripleChecker+Invalid, 9.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 167 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2838 IncrementalHoareTripleChecker+Invalid, 3193 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 167 mSolverCounterUnsat, 138 mSDtfsCounter, 2838 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=337occurred in iteration=14, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 48 ConstructedInterpolants, 8 QuantifiedInterpolants, 1222 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1036 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 17 InterpolantComputations, 11 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 217 locations, 34 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 105.5s, OverallIterations: 16, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 35.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 62.4s, HoareTripleCheckerStatistics: 247 mSolverCounterUnknown, 3925 SdHoareTripleChecker+Valid, 20.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2592 mSDsluCounter, 319 SdHoareTripleChecker+Invalid, 18.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 170 mSDsCounter, 245 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5844 IncrementalHoareTripleChecker+Invalid, 6336 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 245 mSolverCounterUnsat, 149 mSDtfsCounter, 5844 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=677occurred in iteration=15, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 68 ConstructedInterpolants, 10 QuantifiedInterpolants, 1782 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1261 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 19 InterpolantComputations, 11 PerfectInterpolantSequences, 0/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 15:49:30,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aef72f3c-04f2-4091-b6df-cbf5ee1c3ca0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample