./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4e7fbc69 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_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:28:36,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:28:36,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:28:36,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:28:36,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:28:36,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:28:36,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:28:36,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:28:36,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:28:36,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:28:36,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:28:36,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:28:36,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:28:36,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:28:36,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:28:36,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:28:36,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:28:36,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:28:36,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:28:36,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:28:36,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:28:36,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:28:36,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:28:36,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:28:36,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:28:36,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:28:36,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:28:36,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:28:36,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:28:36,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:28:36,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:28:36,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:28:36,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:28:36,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:28:36,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:28:36,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:28:36,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:28:36,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:28:36,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:28:36,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:28:36,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:28:36,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-23 03:28:36,426 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:28:36,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:28:36,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:28:36,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:28:36,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:28:36,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:28:36,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:28:36,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:28:36,430 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:28:36,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:28:36,431 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:28:36,431 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:28:36,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:28:36,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:28:36,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:28:36,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:28:36,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:28:36,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:28:36,433 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-23 03:28:36,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:28:36,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:28:36,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:28:36,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:28:36,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:28:36,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:28:36,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:28:36,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:28:36,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:28:36,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:28:36,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:28:36,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:28:36,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:28:36,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:28:36,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:28:36,437 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:28:36,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:28:36,438 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_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 [2022-11-23 03:28:36,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:28:36,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:28:36,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:28:36,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:28:36,812 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:28:36,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2022-11-23 03:28:39,883 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:28:40,113 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:28:40,114 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2022-11-23 03:28:40,120 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/data/8a71afe07/9c5036ddd3a24d46adf5baff65660612/FLAG039fe4f18 [2022-11-23 03:28:40,135 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/data/8a71afe07/9c5036ddd3a24d46adf5baff65660612 [2022-11-23 03:28:40,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:28:40,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:28:40,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:28:40,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:28:40,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:28:40,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7ffb70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40, skipping insertion in model container [2022-11-23 03:28:40,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:28:40,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:28:40,434 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_c50da1fb-f148-49a7-ade2-8f2befe9bee7/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-11-23 03:28:40,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:28:40,452 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:28:40,496 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_c50da1fb-f148-49a7-ade2-8f2befe9bee7/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-11-23 03:28:40,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:28:40,517 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:28:40,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40 WrapperNode [2022-11-23 03:28:40,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:28:40,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:28:40,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:28:40,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:28:40,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,573 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-11-23 03:28:40,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:28:40,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:28:40,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:28:40,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:28:40,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,624 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:28:40,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:28:40,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:28:40,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:28:40,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (1/1) ... [2022-11-23 03:28:40,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:28:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:40,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:28:40,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:28:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:28:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:28:40,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:28:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:28:40,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:28:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 03:28:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 03:28:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:28:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:28:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:28:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:28:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:28:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:28:40,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:28:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:28:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:28:40,725 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:28:40,855 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:28:40,857 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:28:41,252 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:28:41,316 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:28:41,316 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 03:28:41,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:28:41 BoogieIcfgContainer [2022-11-23 03:28:41,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:28:41,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:28:41,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:28:41,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:28:41,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:28:40" (1/3) ... [2022-11-23 03:28:41,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760a1036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:28:41, skipping insertion in model container [2022-11-23 03:28:41,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:40" (2/3) ... [2022-11-23 03:28:41,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760a1036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:28:41, skipping insertion in model container [2022-11-23 03:28:41,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:28:41" (3/3) ... [2022-11-23 03:28:41,343 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2022-11-23 03:28:41,354 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:28:41,365 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:28:41,366 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-23 03:28:41,366 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:28:41,452 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 03:28:41,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 140 transitions, 304 flow [2022-11-23 03:28:41,564 INFO L130 PetriNetUnfolder]: 16/137 cut-off events. [2022-11-23 03:28:41,569 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 03:28:41,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 16/137 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 198 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2022-11-23 03:28:41,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 140 transitions, 304 flow [2022-11-23 03:28:41,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 116 transitions, 247 flow [2022-11-23 03:28:41,591 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:28:41,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 116 transitions, 247 flow [2022-11-23 03:28:41,630 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 116 transitions, 247 flow [2022-11-23 03:28:41,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 247 flow [2022-11-23 03:28:41,690 INFO L130 PetriNetUnfolder]: 15/116 cut-off events. [2022-11-23 03:28:41,697 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:28:41,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 116 events. 15/116 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 196 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2022-11-23 03:28:41,705 INFO L119 LiptonReduction]: Number of co-enabled transitions 4158 [2022-11-23 03:28:47,113 INFO L134 LiptonReduction]: Checked pairs total: 4303 [2022-11-23 03:28:47,114 INFO L136 LiptonReduction]: Total number of compositions: 116 [2022-11-23 03:28:47,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:28:47,135 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@897a2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:28:47,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2022-11-23 03:28:47,139 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-23 03:28:47,139 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:28:47,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:28:47,140 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:28:47,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:28:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:47,145 INFO L85 PathProgramCache]: Analyzing trace with hash 591083, now seen corresponding path program 1 times [2022-11-23 03:28:47,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:47,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110139447] [2022-11-23 03:28:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:47,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110139447] [2022-11-23 03:28:47,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110139447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:47,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:47,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:28:47,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038935553] [2022-11-23 03:28:47,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:47,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:28:47,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:28:47,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:28:47,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 256 [2022-11-23 03:28:47,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:47,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:28:47,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 256 [2022-11-23 03:28:47,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:28:47,857 INFO L130 PetriNetUnfolder]: 1473/2114 cut-off events. [2022-11-23 03:28:47,857 INFO L131 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2022-11-23 03:28:47,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4379 conditions, 2114 events. 1473/2114 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 9655 event pairs, 573 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 3776. Up to 2037 conditions per place. [2022-11-23 03:28:47,881 INFO L137 encePairwiseOnDemand]: 240/256 looper letters, 40 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2022-11-23 03:28:47,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 203 flow [2022-11-23 03:28:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:28:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:28:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2022-11-23 03:28:47,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5026041666666666 [2022-11-23 03:28:47,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2022-11-23 03:28:47,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2022-11-23 03:28:47,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:28:47,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2022-11-23 03:28:47,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:47,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:47,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:47,913 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 73 flow. Second operand 3 states and 386 transitions. [2022-11-23 03:28:47,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 203 flow [2022-11-23 03:28:47,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 187 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-23 03:28:47,919 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 112 flow [2022-11-23 03:28:47,921 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2022-11-23 03:28:47,924 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-11-23 03:28:47,925 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 112 flow [2022-11-23 03:28:47,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:47,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:28:47,926 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 03:28:47,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:28:47,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:28:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash 18325004, now seen corresponding path program 1 times [2022-11-23 03:28:47,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:47,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92766915] [2022-11-23 03:28:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:48,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:48,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92766915] [2022-11-23 03:28:48,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92766915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:48,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:48,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:28:48,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041361834] [2022-11-23 03:28:48,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:48,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:28:48,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:28:48,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:28:48,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 256 [2022-11-23 03:28:48,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:48,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:28:48,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 256 [2022-11-23 03:28:48,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:28:48,275 INFO L130 PetriNetUnfolder]: 926/1337 cut-off events. [2022-11-23 03:28:48,275 INFO L131 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2022-11-23 03:28:48,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3609 conditions, 1337 events. 926/1337 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5180 event pairs, 702 based on Foata normal form. 0/755 useless extension candidates. Maximal degree in co-relation 3261. Up to 1337 conditions per place. [2022-11-23 03:28:48,307 INFO L137 encePairwiseOnDemand]: 252/256 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-11-23 03:28:48,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 158 flow [2022-11-23 03:28:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:28:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:28:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2022-11-23 03:28:48,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4752604166666667 [2022-11-23 03:28:48,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2022-11-23 03:28:48,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2022-11-23 03:28:48,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:28:48,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2022-11-23 03:28:48,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:48,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:48,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:48,319 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 112 flow. Second operand 3 states and 365 transitions. [2022-11-23 03:28:48,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 158 flow [2022-11-23 03:28:48,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:28:48,322 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 98 flow [2022-11-23 03:28:48,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2022-11-23 03:28:48,323 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2022-11-23 03:28:48,323 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 98 flow [2022-11-23 03:28:48,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:48,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:28:48,325 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 03:28:48,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:28:48,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:28:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 18325005, now seen corresponding path program 1 times [2022-11-23 03:28:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:48,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355712932] [2022-11-23 03:28:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:48,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:48,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:48,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355712932] [2022-11-23 03:28:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355712932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275440738] [2022-11-23 03:28:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:48,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:48,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:48,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:48,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:28:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:28:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:48,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:28:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:49,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275440738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:28:49,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:28:49,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-23 03:28:49,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810067178] [2022-11-23 03:28:49,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:28:49,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:28:49,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:28:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:28:49,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 256 [2022-11-23 03:28:49,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 102.5) internal successors, (820), 8 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:49,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:28:49,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 256 [2022-11-23 03:28:49,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:28:50,119 INFO L130 PetriNetUnfolder]: 2157/3254 cut-off events. [2022-11-23 03:28:50,119 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2022-11-23 03:28:50,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8562 conditions, 3254 events. 2157/3254 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 17258 event pairs, 103 based on Foata normal form. 14/1978 useless extension candidates. Maximal degree in co-relation 8554. Up to 1917 conditions per place. [2022-11-23 03:28:50,140 INFO L137 encePairwiseOnDemand]: 242/256 looper letters, 90 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2022-11-23 03:28:50,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 126 transitions, 647 flow [2022-11-23 03:28:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:28:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:28:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 955 transitions. [2022-11-23 03:28:50,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46630859375 [2022-11-23 03:28:50,144 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 955 transitions. [2022-11-23 03:28:50,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 955 transitions. [2022-11-23 03:28:50,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:28:50,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 955 transitions. [2022-11-23 03:28:50,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.375) internal successors, (955), 8 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:50,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:50,152 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:50,153 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 98 flow. Second operand 8 states and 955 transitions. [2022-11-23 03:28:50,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 126 transitions, 647 flow [2022-11-23 03:28:50,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 126 transitions, 646 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:28:50,158 INFO L231 Difference]: Finished difference. Result has 44 places, 65 transitions, 443 flow [2022-11-23 03:28:50,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=443, PETRI_PLACES=44, PETRI_TRANSITIONS=65} [2022-11-23 03:28:50,160 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2022-11-23 03:28:50,161 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 65 transitions, 443 flow [2022-11-23 03:28:50,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.5) internal successors, (820), 8 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:50,161 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:28:50,162 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 03:28:50,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 03:28:50,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:50,367 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:28:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash 18325000, now seen corresponding path program 1 times [2022-11-23 03:28:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270356387] [2022-11-23 03:28:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:50,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270356387] [2022-11-23 03:28:50,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270356387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:50,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658477912] [2022-11-23 03:28:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:50,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:50,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:50,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:50,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:28:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:28:50,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:50,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:28:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:50,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658477912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:28:50,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:28:50,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-23 03:28:50,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163740266] [2022-11-23 03:28:50,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:28:50,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:28:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:28:50,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:28:50,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 256 [2022-11-23 03:28:50,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 65 transitions, 443 flow. Second operand has 8 states, 8 states have (on average 100.5) internal successors, (804), 8 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:50,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:28:50,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 256 [2022-11-23 03:28:50,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:28:51,878 INFO L130 PetriNetUnfolder]: 3514/5317 cut-off events. [2022-11-23 03:28:51,878 INFO L131 PetriNetUnfolder]: For 7632/7632 co-relation queries the response was YES. [2022-11-23 03:28:51,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20733 conditions, 5317 events. 3514/5317 cut-off events. For 7632/7632 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 30309 event pairs, 245 based on Foata normal form. 292/5095 useless extension candidates. Maximal degree in co-relation 20718. Up to 3087 conditions per place. [2022-11-23 03:28:51,992 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 111 selfloop transitions, 51 changer transitions 0/162 dead transitions. [2022-11-23 03:28:51,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 162 transitions, 1325 flow [2022-11-23 03:28:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:28:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:28:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 793 transitions. [2022-11-23 03:28:51,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44252232142857145 [2022-11-23 03:28:51,996 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 793 transitions. [2022-11-23 03:28:51,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 793 transitions. [2022-11-23 03:28:51,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:28:51,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 793 transitions. [2022-11-23 03:28:52,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.28571428571429) internal successors, (793), 7 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:52,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 256.0) internal successors, (2048), 8 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:52,006 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 256.0) internal successors, (2048), 8 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:52,006 INFO L175 Difference]: Start difference. First operand has 44 places, 65 transitions, 443 flow. Second operand 7 states and 793 transitions. [2022-11-23 03:28:52,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 162 transitions, 1325 flow [2022-11-23 03:28:52,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 162 transitions, 1279 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-11-23 03:28:52,043 INFO L231 Difference]: Finished difference. Result has 51 places, 102 transitions, 946 flow [2022-11-23 03:28:52,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=946, PETRI_PLACES=51, PETRI_TRANSITIONS=102} [2022-11-23 03:28:52,045 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2022-11-23 03:28:52,045 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 102 transitions, 946 flow [2022-11-23 03:28:52,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.5) internal successors, (804), 8 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:52,046 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:28:52,046 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:52,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:52,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:52,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:28:52,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:52,253 INFO L85 PathProgramCache]: Analyzing trace with hash 445336853, now seen corresponding path program 1 times [2022-11-23 03:28:52,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:52,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130525675] [2022-11-23 03:28:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:52,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:52,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:52,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130525675] [2022-11-23 03:28:52,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130525675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:52,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638280418] [2022-11-23 03:28:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:52,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:52,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:52,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:52,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:28:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:52,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:28:52,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:52,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:28:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:53,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638280418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:28:53,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:28:53,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2022-11-23 03:28:53,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070469964] [2022-11-23 03:28:53,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:28:53,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:28:53,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:53,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:28:53,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:28:53,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 256 [2022-11-23 03:28:53,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 102 transitions, 946 flow. Second operand has 10 states, 10 states have (on average 98.0) internal successors, (980), 10 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:53,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:28:53,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 256 [2022-11-23 03:28:53,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:28:55,470 INFO L130 PetriNetUnfolder]: 6420/9147 cut-off events. [2022-11-23 03:28:55,471 INFO L131 PetriNetUnfolder]: For 24901/24901 co-relation queries the response was YES. [2022-11-23 03:28:55,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41220 conditions, 9147 events. 6420/9147 cut-off events. For 24901/24901 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 49400 event pairs, 199 based on Foata normal form. 616/9457 useless extension candidates. Maximal degree in co-relation 41202. Up to 5135 conditions per place. [2022-11-23 03:28:55,567 INFO L137 encePairwiseOnDemand]: 242/256 looper letters, 174 selfloop transitions, 170 changer transitions 0/344 dead transitions. [2022-11-23 03:28:55,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 344 transitions, 3338 flow [2022-11-23 03:28:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:28:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 03:28:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1465 transitions. [2022-11-23 03:28:55,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4402043269230769 [2022-11-23 03:28:55,573 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1465 transitions. [2022-11-23 03:28:55,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1465 transitions. [2022-11-23 03:28:55,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:28:55,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1465 transitions. [2022-11-23 03:28:55,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.6923076923077) internal successors, (1465), 13 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:55,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 256.0) internal successors, (3584), 14 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:55,585 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 256.0) internal successors, (3584), 14 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:55,586 INFO L175 Difference]: Start difference. First operand has 51 places, 102 transitions, 946 flow. Second operand 13 states and 1465 transitions. [2022-11-23 03:28:55,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 344 transitions, 3338 flow [2022-11-23 03:28:55,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 344 transitions, 3215 flow, removed 57 selfloop flow, removed 3 redundant places. [2022-11-23 03:28:55,705 INFO L231 Difference]: Finished difference. Result has 68 places, 233 transitions, 2794 flow [2022-11-23 03:28:55,705 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2794, PETRI_PLACES=68, PETRI_TRANSITIONS=233} [2022-11-23 03:28:55,707 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2022-11-23 03:28:55,708 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 233 transitions, 2794 flow [2022-11-23 03:28:55,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.0) internal successors, (980), 10 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:55,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:28:55,709 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 03:28:55,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:55,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:55,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:28:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash 430007648, now seen corresponding path program 1 times [2022-11-23 03:28:55,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:55,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733133564] [2022-11-23 03:28:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:55,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:56,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:56,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733133564] [2022-11-23 03:28:56,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733133564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:56,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814405317] [2022-11-23 03:28:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:56,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:56,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:56,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:56,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:28:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:28:56,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:56,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:28:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:56,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814405317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:28:56,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:28:56,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-23 03:28:56,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203330901] [2022-11-23 03:28:56,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:28:56,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:28:56,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:28:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:28:56,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 256 [2022-11-23 03:28:56,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 233 transitions, 2794 flow. Second operand has 8 states, 8 states have (on average 101.25) internal successors, (810), 8 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:56,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:28:56,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 256 [2022-11-23 03:28:56,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:28:58,319 INFO L130 PetriNetUnfolder]: 6854/9871 cut-off events. [2022-11-23 03:28:58,320 INFO L131 PetriNetUnfolder]: For 47089/47089 co-relation queries the response was YES. [2022-11-23 03:28:58,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54912 conditions, 9871 events. 6854/9871 cut-off events. For 47089/47089 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 55163 event pairs, 325 based on Foata normal form. 652/10181 useless extension candidates. Maximal degree in co-relation 54886. Up to 4869 conditions per place. [2022-11-23 03:28:58,417 INFO L137 encePairwiseOnDemand]: 242/256 looper letters, 180 selfloop transitions, 182 changer transitions 0/362 dead transitions. [2022-11-23 03:28:58,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 362 transitions, 4767 flow [2022-11-23 03:28:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:28:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:28:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 787 transitions. [2022-11-23 03:28:58,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43917410714285715 [2022-11-23 03:28:58,421 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 787 transitions. [2022-11-23 03:28:58,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 787 transitions. [2022-11-23 03:28:58,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:28:58,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 787 transitions. [2022-11-23 03:28:58,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.42857142857143) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:58,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 256.0) internal successors, (2048), 8 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:58,433 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 256.0) internal successors, (2048), 8 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:58,433 INFO L175 Difference]: Start difference. First operand has 68 places, 233 transitions, 2794 flow. Second operand 7 states and 787 transitions. [2022-11-23 03:28:58,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 362 transitions, 4767 flow [2022-11-23 03:28:58,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 362 transitions, 4605 flow, removed 79 selfloop flow, removed 1 redundant places. [2022-11-23 03:28:58,893 INFO L231 Difference]: Finished difference. Result has 78 places, 309 transitions, 4493 flow [2022-11-23 03:28:58,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4493, PETRI_PLACES=78, PETRI_TRANSITIONS=309} [2022-11-23 03:28:58,894 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2022-11-23 03:28:58,895 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 309 transitions, 4493 flow [2022-11-23 03:28:58,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.25) internal successors, (810), 8 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:58,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:28:58,895 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:58,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:59,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:59,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:28:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:59,102 INFO L85 PathProgramCache]: Analyzing trace with hash 920541856, now seen corresponding path program 1 times [2022-11-23 03:28:59,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:59,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137464792] [2022-11-23 03:28:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:59,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:59,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137464792] [2022-11-23 03:28:59,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137464792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089845401] [2022-11-23 03:28:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:59,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:59,346 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:59,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:28:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:59,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:28:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:59,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:00,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089845401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:29:00,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:29:00,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-23 03:29:00,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599101230] [2022-11-23 03:29:00,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:29:00,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:29:00,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:29:00,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:29:00,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 256 [2022-11-23 03:29:00,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 309 transitions, 4493 flow. Second operand has 14 states, 14 states have (on average 93.71428571428571) internal successors, (1312), 14 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:00,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:29:00,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 256 [2022-11-23 03:29:00,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:29:04,879 INFO L130 PetriNetUnfolder]: 13436/19023 cut-off events. [2022-11-23 03:29:04,880 INFO L131 PetriNetUnfolder]: For 163978/163978 co-relation queries the response was YES. [2022-11-23 03:29:04,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121180 conditions, 19023 events. 13436/19023 cut-off events. For 163978/163978 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 111238 event pairs, 591 based on Foata normal form. 1094/19435 useless extension candidates. Maximal degree in co-relation 121148. Up to 8021 conditions per place. [2022-11-23 03:29:05,073 INFO L137 encePairwiseOnDemand]: 242/256 looper letters, 334 selfloop transitions, 616 changer transitions 0/950 dead transitions. [2022-11-23 03:29:05,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 950 transitions, 14705 flow [2022-11-23 03:29:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 03:29:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 03:29:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1837 transitions. [2022-11-23 03:29:05,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4221047794117647 [2022-11-23 03:29:05,080 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1837 transitions. [2022-11-23 03:29:05,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1837 transitions. [2022-11-23 03:29:05,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:29:05,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1837 transitions. [2022-11-23 03:29:05,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 108.05882352941177) internal successors, (1837), 17 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:05,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:05,093 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:05,093 INFO L175 Difference]: Start difference. First operand has 78 places, 309 transitions, 4493 flow. Second operand 17 states and 1837 transitions. [2022-11-23 03:29:05,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 950 transitions, 14705 flow [2022-11-23 03:29:06,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 950 transitions, 14578 flow, removed 61 selfloop flow, removed 2 redundant places. [2022-11-23 03:29:06,911 INFO L231 Difference]: Finished difference. Result has 105 places, 789 transitions, 14607 flow [2022-11-23 03:29:06,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=14607, PETRI_PLACES=105, PETRI_TRANSITIONS=789} [2022-11-23 03:29:06,912 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 69 predicate places. [2022-11-23 03:29:06,912 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 789 transitions, 14607 flow [2022-11-23 03:29:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 93.71428571428571) internal successors, (1312), 14 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:06,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:29:06,913 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:06,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 03:29:07,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 03:29:07,114 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:29:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:07,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1527048403, now seen corresponding path program 1 times [2022-11-23 03:29:07,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:07,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972119221] [2022-11-23 03:29:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:07,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:29:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972119221] [2022-11-23 03:29:07,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972119221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:29:07,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:29:07,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:29:07,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439519230] [2022-11-23 03:29:07,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:29:07,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:29:07,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:29:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:29:07,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 256 [2022-11-23 03:29:07,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 789 transitions, 14607 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:07,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:29:07,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 256 [2022-11-23 03:29:07,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:29:11,559 INFO L130 PetriNetUnfolder]: 11926/17041 cut-off events. [2022-11-23 03:29:11,559 INFO L131 PetriNetUnfolder]: For 223414/223414 co-relation queries the response was YES. [2022-11-23 03:29:11,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124549 conditions, 17041 events. 11926/17041 cut-off events. For 223414/223414 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 99565 event pairs, 4616 based on Foata normal form. 828/17295 useless extension candidates. Maximal degree in co-relation 124504. Up to 17041 conditions per place. [2022-11-23 03:29:11,796 INFO L137 encePairwiseOnDemand]: 254/256 looper letters, 722 selfloop transitions, 1 changer transitions 0/723 dead transitions. [2022-11-23 03:29:11,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 723 transitions, 14627 flow [2022-11-23 03:29:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:29:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:29:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2022-11-23 03:29:11,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4440104166666667 [2022-11-23 03:29:11,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2022-11-23 03:29:11,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2022-11-23 03:29:11,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:29:11,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2022-11-23 03:29:11,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:11,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:11,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:11,804 INFO L175 Difference]: Start difference. First operand has 105 places, 789 transitions, 14607 flow. Second operand 3 states and 341 transitions. [2022-11-23 03:29:11,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 723 transitions, 14627 flow [2022-11-23 03:29:14,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 723 transitions, 13998 flow, removed 310 selfloop flow, removed 3 redundant places. [2022-11-23 03:29:14,982 INFO L231 Difference]: Finished difference. Result has 103 places, 723 transitions, 12554 flow [2022-11-23 03:29:14,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=12552, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=12554, PETRI_PLACES=103, PETRI_TRANSITIONS=723} [2022-11-23 03:29:14,983 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 67 predicate places. [2022-11-23 03:29:14,983 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 723 transitions, 12554 flow [2022-11-23 03:29:14,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:14,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:29:14,983 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:14,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:29:14,984 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:29:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:14,984 INFO L85 PathProgramCache]: Analyzing trace with hash 70944361, now seen corresponding path program 1 times [2022-11-23 03:29:14,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:14,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130770445] [2022-11-23 03:29:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:29:15,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130770445] [2022-11-23 03:29:15,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130770445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:29:15,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:29:15,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:29:15,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321078492] [2022-11-23 03:29:15,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:29:15,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:29:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:15,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:29:15,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:29:15,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 256 [2022-11-23 03:29:15,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 723 transitions, 12554 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:15,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:29:15,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 256 [2022-11-23 03:29:15,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:29:18,381 INFO L130 PetriNetUnfolder]: 10755/15500 cut-off events. [2022-11-23 03:29:18,381 INFO L131 PetriNetUnfolder]: For 173259/173259 co-relation queries the response was YES. [2022-11-23 03:29:18,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105899 conditions, 15500 events. 10755/15500 cut-off events. For 173259/173259 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 90774 event pairs, 4314 based on Foata normal form. 42/15542 useless extension candidates. Maximal degree in co-relation 105854. Up to 15500 conditions per place. [2022-11-23 03:29:18,609 INFO L137 encePairwiseOnDemand]: 254/256 looper letters, 687 selfloop transitions, 1 changer transitions 0/688 dead transitions. [2022-11-23 03:29:18,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 688 transitions, 13193 flow [2022-11-23 03:29:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:29:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:29:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2022-11-23 03:29:18,612 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4427083333333333 [2022-11-23 03:29:18,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2022-11-23 03:29:18,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2022-11-23 03:29:18,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:29:18,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2022-11-23 03:29:18,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:18,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:18,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:18,616 INFO L175 Difference]: Start difference. First operand has 103 places, 723 transitions, 12554 flow. Second operand 3 states and 340 transitions. [2022-11-23 03:29:18,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 688 transitions, 13193 flow [2022-11-23 03:29:20,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 688 transitions, 13192 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:29:20,785 INFO L231 Difference]: Finished difference. Result has 103 places, 688 transitions, 11818 flow [2022-11-23 03:29:20,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=11816, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=11818, PETRI_PLACES=103, PETRI_TRANSITIONS=688} [2022-11-23 03:29:20,786 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 67 predicate places. [2022-11-23 03:29:20,786 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 688 transitions, 11818 flow [2022-11-23 03:29:20,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:20,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:29:20,787 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:20,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 03:29:20,787 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:29:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash 70944365, now seen corresponding path program 1 times [2022-11-23 03:29:20,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:20,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924181833] [2022-11-23 03:29:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:20,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:21,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924181833] [2022-11-23 03:29:21,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924181833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:29:21,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224013005] [2022-11-23 03:29:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:21,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:21,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:29:21,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:29:21,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:29:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:21,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 03:29:21,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:29:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:22,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:29:22,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224013005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:29:22,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:29:22,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 14 [2022-11-23 03:29:22,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95291032] [2022-11-23 03:29:22,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:29:22,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:29:22,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:29:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:29:23,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 256 [2022-11-23 03:29:23,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 688 transitions, 11818 flow. Second operand has 16 states, 16 states have (on average 94.6875) internal successors, (1515), 16 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:23,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:29:23,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 256 [2022-11-23 03:29:23,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:29:30,357 INFO L130 PetriNetUnfolder]: 20184/28523 cut-off events. [2022-11-23 03:29:30,357 INFO L131 PetriNetUnfolder]: For 344267/344267 co-relation queries the response was YES. [2022-11-23 03:29:30,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197973 conditions, 28523 events. 20184/28523 cut-off events. For 344267/344267 co-relation queries the response was YES. Maximal size of possible extension queue 1445. Compared 175687 event pairs, 751 based on Foata normal form. 1008/29531 useless extension candidates. Maximal degree in co-relation 197927. Up to 7853 conditions per place. [2022-11-23 03:29:30,728 INFO L137 encePairwiseOnDemand]: 244/256 looper letters, 643 selfloop transitions, 1111 changer transitions 0/1754 dead transitions. [2022-11-23 03:29:30,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 1754 transitions, 31452 flow [2022-11-23 03:29:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 03:29:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-23 03:29:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2390 transitions. [2022-11-23 03:29:30,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42436079545454547 [2022-11-23 03:29:30,738 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2390 transitions. [2022-11-23 03:29:30,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2390 transitions. [2022-11-23 03:29:30,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:29:30,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2390 transitions. [2022-11-23 03:29:30,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 108.63636363636364) internal successors, (2390), 22 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:30,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 256.0) internal successors, (5888), 23 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:30,761 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 256.0) internal successors, (5888), 23 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:30,761 INFO L175 Difference]: Start difference. First operand has 103 places, 688 transitions, 11818 flow. Second operand 22 states and 2390 transitions. [2022-11-23 03:29:30,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 1754 transitions, 31452 flow [2022-11-23 03:29:37,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 1754 transitions, 31413 flow, removed 19 selfloop flow, removed 1 redundant places. [2022-11-23 03:29:37,654 INFO L231 Difference]: Finished difference. Result has 142 places, 1458 transitions, 30163 flow [2022-11-23 03:29:37,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=11431, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=30163, PETRI_PLACES=142, PETRI_TRANSITIONS=1458} [2022-11-23 03:29:37,655 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 106 predicate places. [2022-11-23 03:29:37,656 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 1458 transitions, 30163 flow [2022-11-23 03:29:37,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 94.6875) internal successors, (1515), 16 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:37,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:29:37,657 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:37,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:29:37,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 03:29:37,862 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:29:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash 920571627, now seen corresponding path program 2 times [2022-11-23 03:29:37,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:37,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521973952] [2022-11-23 03:29:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:37,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:29:38,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:38,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521973952] [2022-11-23 03:29:38,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521973952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:29:38,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131396047] [2022-11-23 03:29:38,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:29:38,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:38,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:29:38,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:29:38,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:29:38,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:29:38,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:29:38,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:29:38,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:29:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:38,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:38,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131396047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:29:38,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:29:38,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2022-11-23 03:29:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646075934] [2022-11-23 03:29:38,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:29:38,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:29:38,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:38,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:29:38,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:29:39,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 256 [2022-11-23 03:29:39,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 1458 transitions, 30163 flow. Second operand has 13 states, 13 states have (on average 92.84615384615384) internal successors, (1207), 13 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:39,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:29:39,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 256 [2022-11-23 03:29:39,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:29:54,200 INFO L130 PetriNetUnfolder]: 26457/38024 cut-off events. [2022-11-23 03:29:54,200 INFO L131 PetriNetUnfolder]: For 708208/708208 co-relation queries the response was YES. [2022-11-23 03:29:54,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295017 conditions, 38024 events. 26457/38024 cut-off events. For 708208/708208 co-relation queries the response was YES. Maximal size of possible extension queue 2125. Compared 253956 event pairs, 2449 based on Foata normal form. 3426/41450 useless extension candidates. Maximal degree in co-relation 294951. Up to 16549 conditions per place. [2022-11-23 03:29:54,754 INFO L137 encePairwiseOnDemand]: 245/256 looper letters, 1136 selfloop transitions, 1285 changer transitions 0/2421 dead transitions. [2022-11-23 03:29:54,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 2421 transitions, 52373 flow [2022-11-23 03:29:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:29:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:29:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1879 transitions. [2022-11-23 03:29:54,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4077690972222222 [2022-11-23 03:29:54,762 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1879 transitions. [2022-11-23 03:29:54,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1879 transitions. [2022-11-23 03:29:54,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:29:54,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1879 transitions. [2022-11-23 03:29:54,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.38888888888889) internal successors, (1879), 18 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:54,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:54,776 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:54,777 INFO L175 Difference]: Start difference. First operand has 142 places, 1458 transitions, 30163 flow. Second operand 18 states and 1879 transitions. [2022-11-23 03:29:54,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 2421 transitions, 52373 flow [2022-11-23 03:30:22,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 2421 transitions, 51157 flow, removed 602 selfloop flow, removed 3 redundant places. [2022-11-23 03:30:22,765 INFO L231 Difference]: Finished difference. Result has 170 places, 2003 transitions, 45122 flow [2022-11-23 03:30:22,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=27525, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=684, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=45122, PETRI_PLACES=170, PETRI_TRANSITIONS=2003} [2022-11-23 03:30:22,766 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 134 predicate places. [2022-11-23 03:30:22,766 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 2003 transitions, 45122 flow [2022-11-23 03:30:22,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 92.84615384615384) internal successors, (1207), 13 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:30:22,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:30:22,767 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-23 03:30:22,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:30:22,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:30:22,971 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2022-11-23 03:30:22,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:30:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1527049334, now seen corresponding path program 2 times [2022-11-23 03:30:22,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:30:22,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605984361] [2022-11-23 03:30:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:30:22,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:30:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:30:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:30:23,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:30:23,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605984361] [2022-11-23 03:30:23,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605984361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:30:23,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839565443] [2022-11-23 03:30:23,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:30:23,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:30:23,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:30:23,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:30:23,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c50da1fb-f148-49a7-ade2-8f2befe9bee7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:30:23,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:30:23,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:30:23,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:30:23,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:30:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:30:23,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:30:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:30:24,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839565443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:30:24,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:30:24,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-23 03:30:24,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407381734] [2022-11-23 03:30:24,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:30:24,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:30:24,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:30:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:30:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:30:24,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 256 [2022-11-23 03:30:24,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 2003 transitions, 45122 flow. Second operand has 15 states, 15 states have (on average 92.73333333333333) internal successors, (1391), 15 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:30:24,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:30:24,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 256 [2022-11-23 03:30:24,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand