./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bf2f5f336333cdf96c271b32cdeb9b70ee932e1c07acf27a63b4425ec902f3e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:37:16,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:37:16,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:37:16,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:37:16,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:37:16,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:37:16,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:37:16,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:37:16,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:37:16,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:37:16,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:37:16,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:37:16,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:37:16,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:37:16,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:37:16,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:37:16,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:37:16,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:37:16,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:37:16,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:37:16,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:37:16,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:37:16,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:37:16,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:37:16,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:37:16,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:37:16,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:37:16,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:37:16,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:37:16,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:37:16,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:37:16,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:37:16,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:37:16,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:37:16,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:37:16,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:37:16,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:37:16,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:37:16,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:37:16,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:37:16,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:37:16,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 17:37:16,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:37:16,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:37:16,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:37:16,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:37:16,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:37:16,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:37:16,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:37:16,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:37:16,370 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:37:16,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:37:16,370 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:37:16,371 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:37:16,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:37:16,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:37:16,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:37:16,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:37:16,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:37:16,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:37:16,373 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 17:37:16,373 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:37:16,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:37:16,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:37:16,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:37:16,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:37:16,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:37:16,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:37:16,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:16,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:37:16,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:37:16,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:37:16,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:37:16,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:37:16,377 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:37:16,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:37:16,377 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:37:16,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:37:16,378 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_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf2f5f336333cdf96c271b32cdeb9b70ee932e1c07acf27a63b4425ec902f3e [2022-11-25 17:37:16,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:37:16,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:37:16,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:37:16,661 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:37:16,661 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:37:16,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i [2022-11-25 17:37:19,834 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:37:20,208 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:37:20,209 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i [2022-11-25 17:37:20,236 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/data/b3ceb236d/259bbb4aacb54fd38fd268f43aa3ee6d/FLAGdefe3f06f [2022-11-25 17:37:20,252 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/data/b3ceb236d/259bbb4aacb54fd38fd268f43aa3ee6d [2022-11-25 17:37:20,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:37:20,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:37:20,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:20,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:37:20,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:37:20,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:20" (1/1) ... [2022-11-25 17:37:20,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ac129b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:20, skipping insertion in model container [2022-11-25 17:37:20,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:20" (1/1) ... [2022-11-25 17:37:20,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:37:20,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:37:21,222 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 17:37:21,227 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,229 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,240 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,248 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,248 WARN L623 FunctionHandler]: Unknown extern function sleep [2022-11-25 17:37:21,251 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 17:37:21,252 WARN L623 FunctionHandler]: Unknown extern function sleep [2022-11-25 17:37:21,254 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,255 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,256 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,257 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,260 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 17:37:21,265 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,266 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,268 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,269 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,270 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,272 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,273 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,274 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:37:21,290 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:37:21,343 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 17:37:21,344 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,345 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,346 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,347 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,348 WARN L623 FunctionHandler]: Unknown extern function sleep [2022-11-25 17:37:21,350 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 17:37:21,350 WARN L623 FunctionHandler]: Unknown extern function sleep [2022-11-25 17:37:21,351 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,352 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,353 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,354 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,357 WARN L623 FunctionHandler]: Unknown extern function time [2022-11-25 17:37:21,359 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,371 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,372 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,373 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,374 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,375 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,376 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:37:21,377 WARN L623 FunctionHandler]: Unknown extern function strerror [2022-11-25 17:37:21,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:37:21,594 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:37:21,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21 WrapperNode [2022-11-25 17:37:21,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:21,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:37:21,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:37:21,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:37:21,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,701 INFO L138 Inliner]: procedures = 524, calls = 61, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 125 [2022-11-25 17:37:21,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:37:21,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:37:21,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:37:21,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:37:21,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,782 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:37:21,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:37:21,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:37:21,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:37:21,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (1/1) ... [2022-11-25 17:37:21,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:21,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:21,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:37:21,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:37:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure counter_thread [2022-11-25 17:37:21,904 INFO L138 BoogieDeclarations]: Found implementation of procedure counter_thread [2022-11-25 17:37:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure sleep [2022-11-25 17:37:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure monitor_thread [2022-11-25 17:37:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure monitor_thread [2022-11-25 17:37:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-11-25 17:37:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:37:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:37:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:37:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:37:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:37:21,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:37:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:37:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-11-25 17:37:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-11-25 17:37:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:37:21,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:37:21,910 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:37:22,299 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:37:22,302 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:37:22,595 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:37:22,605 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:37:22,610 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-25 17:37:22,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:37:22 BoogieIcfgContainer [2022-11-25 17:37:22,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:37:22,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:37:22,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:37:22,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:37:22,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:37:20" (1/3) ... [2022-11-25 17:37:22,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b806d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:37:22, skipping insertion in model container [2022-11-25 17:37:22,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:21" (2/3) ... [2022-11-25 17:37:22,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b806d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:37:22, skipping insertion in model container [2022-11-25 17:37:22,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:37:22" (3/3) ... [2022-11-25 17:37:22,628 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_36-trylock_nr.i [2022-11-25 17:37:22,639 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:37:22,650 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:37:22,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 17:37:22,650 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:37:22,790 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:37:22,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 238 transitions, 492 flow [2022-11-25 17:37:22,990 INFO L130 PetriNetUnfolder]: 32/236 cut-off events. [2022-11-25 17:37:22,990 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:37:22,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 236 events. 32/236 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 493 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 142. Up to 5 conditions per place. [2022-11-25 17:37:23,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 238 transitions, 492 flow [2022-11-25 17:37:23,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 210 transitions, 429 flow [2022-11-25 17:37:23,020 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:37:23,044 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 210 transitions, 429 flow [2022-11-25 17:37:23,047 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 210 transitions, 429 flow [2022-11-25 17:37:23,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 210 transitions, 429 flow [2022-11-25 17:37:23,093 INFO L130 PetriNetUnfolder]: 28/210 cut-off events. [2022-11-25 17:37:23,094 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:37:23,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 210 events. 28/210 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 446 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 138. Up to 5 conditions per place. [2022-11-25 17:37:23,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 11614 [2022-11-25 17:37:35,550 INFO L134 LiptonReduction]: Checked pairs total: 11180 [2022-11-25 17:37:35,550 INFO L136 LiptonReduction]: Total number of compositions: 234 [2022-11-25 17:37:35,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:37:35,591 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;@5fc10da6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:37:35,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-25 17:37:35,595 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:37:35,595 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:35,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:35,597 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:37:35,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:35,607 INFO L85 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2022-11-25 17:37:35,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:35,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310534362] [2022-11-25 17:37:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:35,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:35,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310534362] [2022-11-25 17:37:35,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310534362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:35,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:35,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:37:35,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920390226] [2022-11-25 17:37:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:37:35,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:37:35,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:37:35,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 472 [2022-11-25 17:37:35,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 48 transitions, 105 flow. Second operand has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:35,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:35,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 472 [2022-11-25 17:37:35,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:36,195 INFO L130 PetriNetUnfolder]: 368/595 cut-off events. [2022-11-25 17:37:36,195 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 17:37:36,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 595 events. 368/595 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2403 event pairs, 268 based on Foata normal form. 86/345 useless extension candidates. Maximal degree in co-relation 1111. Up to 575 conditions per place. [2022-11-25 17:37:36,206 INFO L137 encePairwiseOnDemand]: 459/472 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2022-11-25 17:37:36,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 115 flow [2022-11-25 17:37:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:37:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:37:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 453 transitions. [2022-11-25 17:37:36,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4798728813559322 [2022-11-25 17:37:36,230 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 453 transitions. [2022-11-25 17:37:36,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 453 transitions. [2022-11-25 17:37:36,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:36,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 453 transitions. [2022-11-25 17:37:36,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 226.5) internal successors, (453), 2 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 472.0) internal successors, (1416), 3 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,252 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 472.0) internal successors, (1416), 3 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,254 INFO L175 Difference]: Start difference. First operand has 37 places, 48 transitions, 105 flow. Second operand 2 states and 453 transitions. [2022-11-25 17:37:36,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 115 flow [2022-11-25 17:37:36,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:37:36,260 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 58 flow [2022-11-25 17:37:36,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2022-11-25 17:37:36,266 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -9 predicate places. [2022-11-25 17:37:36,267 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 58 flow [2022-11-25 17:37:36,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:36,267 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:37:36,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:37:36,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting counter_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash 927101375, now seen corresponding path program 1 times [2022-11-25 17:37:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:36,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285549992] [2022-11-25 17:37:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:36,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:36,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285549992] [2022-11-25 17:37:36,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285549992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:36,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:36,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:36,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327984180] [2022-11-25 17:37:36,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:36,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:36,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:36,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 472 [2022-11-25 17:37:36,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:36,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 472 [2022-11-25 17:37:36,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:36,705 INFO L130 PetriNetUnfolder]: 506/814 cut-off events. [2022-11-25 17:37:36,706 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:37:36,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1631 conditions, 814 events. 506/814 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3723 event pairs, 268 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 1628. Up to 575 conditions per place. [2022-11-25 17:37:36,711 INFO L137 encePairwiseOnDemand]: 468/472 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-11-25 17:37:36,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 180 flow [2022-11-25 17:37:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2022-11-25 17:37:36,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.461864406779661 [2022-11-25 17:37:36,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2022-11-25 17:37:36,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2022-11-25 17:37:36,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:36,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2022-11-25 17:37:36,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,723 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 58 flow. Second operand 3 states and 654 transitions. [2022-11-25 17:37:36,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 180 flow [2022-11-25 17:37:36,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:37:36,725 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 72 flow [2022-11-25 17:37:36,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2022-11-25 17:37:36,726 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -6 predicate places. [2022-11-25 17:37:36,727 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 72 flow [2022-11-25 17:37:36,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:36,728 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:37:36,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:37:36,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash 927101303, now seen corresponding path program 1 times [2022-11-25 17:37:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898219539] [2022-11-25 17:37:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:36,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:36,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:36,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898219539] [2022-11-25 17:37:36,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898219539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:36,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:36,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:37:36,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915565814] [2022-11-25 17:37:36,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:36,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:36,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:36,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 472 [2022-11-25 17:37:36,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:36,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:36,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 472 [2022-11-25 17:37:36,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:37,091 INFO L130 PetriNetUnfolder]: 690/1089 cut-off events. [2022-11-25 17:37:37,091 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2022-11-25 17:37:37,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2462 conditions, 1089 events. 690/1089 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4966 event pairs, 181 based on Foata normal form. 24/598 useless extension candidates. Maximal degree in co-relation 2457. Up to 822 conditions per place. [2022-11-25 17:37:37,098 INFO L137 encePairwiseOnDemand]: 466/472 looper letters, 44 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-11-25 17:37:37,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 46 transitions, 209 flow [2022-11-25 17:37:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2022-11-25 17:37:37,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646892655367232 [2022-11-25 17:37:37,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2022-11-25 17:37:37,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2022-11-25 17:37:37,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:37,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2022-11-25 17:37:37,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,109 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 72 flow. Second operand 3 states and 658 transitions. [2022-11-25 17:37:37,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 46 transitions, 209 flow [2022-11-25 17:37:37,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 46 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:37,111 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 90 flow [2022-11-25 17:37:37,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2022-11-25 17:37:37,112 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2022-11-25 17:37:37,113 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 90 flow [2022-11-25 17:37:37,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:37,114 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:37:37,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:37:37,114 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1324627559, now seen corresponding path program 1 times [2022-11-25 17:37:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:37,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053419456] [2022-11-25 17:37:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:37,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:37,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:37,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053419456] [2022-11-25 17:37:37,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053419456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:37,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:37,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:37,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786938352] [2022-11-25 17:37:37,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:37,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:37,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:37,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:37,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:37,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 472 [2022-11-25 17:37:37,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:37,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 472 [2022-11-25 17:37:37,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:37,361 INFO L130 PetriNetUnfolder]: 548/864 cut-off events. [2022-11-25 17:37:37,361 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2022-11-25 17:37:37,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 864 events. 548/864 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3547 event pairs, 420 based on Foata normal form. 0/530 useless extension candidates. Maximal degree in co-relation 2087. Up to 864 conditions per place. [2022-11-25 17:37:37,368 INFO L137 encePairwiseOnDemand]: 469/472 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-11-25 17:37:37,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 136 flow [2022-11-25 17:37:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2022-11-25 17:37:37,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4491525423728814 [2022-11-25 17:37:37,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2022-11-25 17:37:37,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2022-11-25 17:37:37,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:37,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2022-11-25 17:37:37,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,378 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 90 flow. Second operand 3 states and 636 transitions. [2022-11-25 17:37:37,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 136 flow [2022-11-25 17:37:37,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:37,382 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 82 flow [2022-11-25 17:37:37,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2022-11-25 17:37:37,384 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2022-11-25 17:37:37,384 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 82 flow [2022-11-25 17:37:37,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:37,385 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:37:37,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:37:37,386 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1324627558, now seen corresponding path program 1 times [2022-11-25 17:37:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433386471] [2022-11-25 17:37:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:37,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:37,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433386471] [2022-11-25 17:37:37,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433386471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:37,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559928872] [2022-11-25 17:37:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:37,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:37,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:37,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:37:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:37,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:37:37,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:37,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:37,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559928872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:37,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:37,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 17:37:37,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449070796] [2022-11-25 17:37:37,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:37,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:37:37,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:37,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:37:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:37:37,806 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 472 [2022-11-25 17:37:37,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 205.42857142857142) internal successors, (1438), 7 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:37,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:37,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 472 [2022-11-25 17:37:37,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:38,229 INFO L130 PetriNetUnfolder]: 1266/1960 cut-off events. [2022-11-25 17:37:38,230 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2022-11-25 17:37:38,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4722 conditions, 1960 events. 1266/1960 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9159 event pairs, 146 based on Foata normal form. 192/1322 useless extension candidates. Maximal degree in co-relation 4716. Up to 645 conditions per place. [2022-11-25 17:37:38,243 INFO L137 encePairwiseOnDemand]: 467/472 looper letters, 96 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2022-11-25 17:37:38,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 107 transitions, 506 flow [2022-11-25 17:37:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:37:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:37:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1327 transitions. [2022-11-25 17:37:38,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4685734463276836 [2022-11-25 17:37:38,248 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1327 transitions. [2022-11-25 17:37:38,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1327 transitions. [2022-11-25 17:37:38,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:38,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1327 transitions. [2022-11-25 17:37:38,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:38,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 472.0) internal successors, (3304), 7 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:38,260 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 472.0) internal successors, (3304), 7 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:38,261 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 82 flow. Second operand 6 states and 1327 transitions. [2022-11-25 17:37:38,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 107 transitions, 506 flow [2022-11-25 17:37:38,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 107 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:38,264 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 179 flow [2022-11-25 17:37:38,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2022-11-25 17:37:38,266 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2022-11-25 17:37:38,266 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 179 flow [2022-11-25 17:37:38,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 205.42857142857142) internal successors, (1438), 7 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:38,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:38,267 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:37:38,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:38,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:38,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting counter_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1324627487, now seen corresponding path program 1 times [2022-11-25 17:37:38,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:38,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300973874] [2022-11-25 17:37:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:38,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:38,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:38,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300973874] [2022-11-25 17:37:38,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300973874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:38,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089652504] [2022-11-25 17:37:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:38,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:38,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:38,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:38,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:37:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:38,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:37:38,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:38,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:38,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089652504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:38,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:37:38,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-25 17:37:38,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804040725] [2022-11-25 17:37:38,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:38,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:37:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:37:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:37:38,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 472 [2022-11-25 17:37:38,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:38,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:38,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 472 [2022-11-25 17:37:38,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:39,140 INFO L130 PetriNetUnfolder]: 1114/1733 cut-off events. [2022-11-25 17:37:39,141 INFO L131 PetriNetUnfolder]: For 673/673 co-relation queries the response was YES. [2022-11-25 17:37:39,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4752 conditions, 1733 events. 1114/1733 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8064 event pairs, 105 based on Foata normal form. 0/1171 useless extension candidates. Maximal degree in co-relation 4743. Up to 1124 conditions per place. [2022-11-25 17:37:39,153 INFO L137 encePairwiseOnDemand]: 469/472 looper letters, 57 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2022-11-25 17:37:39,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 365 flow [2022-11-25 17:37:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:37:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:37:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 870 transitions. [2022-11-25 17:37:39,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4608050847457627 [2022-11-25 17:37:39,156 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 870 transitions. [2022-11-25 17:37:39,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 870 transitions. [2022-11-25 17:37:39,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:39,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 870 transitions. [2022-11-25 17:37:39,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:39,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 472.0) internal successors, (2360), 5 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:39,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 472.0) internal successors, (2360), 5 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:39,163 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 179 flow. Second operand 4 states and 870 transitions. [2022-11-25 17:37:39,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 64 transitions, 365 flow [2022-11-25 17:37:39,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 357 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:39,168 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 160 flow [2022-11-25 17:37:39,169 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2022-11-25 17:37:39,169 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2022-11-25 17:37:39,170 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 160 flow [2022-11-25 17:37:39,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:39,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:39,171 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:37:39,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:39,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:37:39,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1322147845, now seen corresponding path program 1 times [2022-11-25 17:37:39,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:39,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890803389] [2022-11-25 17:37:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:39,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:39,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:39,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890803389] [2022-11-25 17:37:39,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890803389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:39,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:39,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:39,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942085495] [2022-11-25 17:37:39,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:39,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:39,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:39,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:39,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:39,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 472 [2022-11-25 17:37:39,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:39,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:39,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 472 [2022-11-25 17:37:39,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:39,869 INFO L130 PetriNetUnfolder]: 1753/2696 cut-off events. [2022-11-25 17:37:39,869 INFO L131 PetriNetUnfolder]: For 2975/2975 co-relation queries the response was YES. [2022-11-25 17:37:39,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7619 conditions, 2696 events. 1753/2696 cut-off events. For 2975/2975 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13572 event pairs, 836 based on Foata normal form. 0/1812 useless extension candidates. Maximal degree in co-relation 7609. Up to 1734 conditions per place. [2022-11-25 17:37:39,889 INFO L137 encePairwiseOnDemand]: 468/472 looper letters, 56 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-11-25 17:37:39,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 58 transitions, 413 flow [2022-11-25 17:37:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2022-11-25 17:37:39,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4639830508474576 [2022-11-25 17:37:39,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2022-11-25 17:37:39,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2022-11-25 17:37:39,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:39,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2022-11-25 17:37:39,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:39,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:39,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:39,898 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 160 flow. Second operand 3 states and 657 transitions. [2022-11-25 17:37:39,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 58 transitions, 413 flow [2022-11-25 17:37:39,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:39,903 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 167 flow [2022-11-25 17:37:39,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2022-11-25 17:37:39,905 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2022-11-25 17:37:39,905 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 167 flow [2022-11-25 17:37:39,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:39,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:39,906 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:39,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:37:39,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:39,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:39,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1963090646, now seen corresponding path program 1 times [2022-11-25 17:37:39,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:39,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497667536] [2022-11-25 17:37:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:39,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:40,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:40,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497667536] [2022-11-25 17:37:40,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497667536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:40,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719916929] [2022-11-25 17:37:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:40,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:40,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:40,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:37:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:40,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:37:40,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:40,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:40,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719916929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:40,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:37:40,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-25 17:37:40,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829095660] [2022-11-25 17:37:40,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:40,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:37:40,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:40,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:37:40,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:37:40,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 472 [2022-11-25 17:37:40,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:40,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:40,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 472 [2022-11-25 17:37:40,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:40,584 INFO L130 PetriNetUnfolder]: 1621/2488 cut-off events. [2022-11-25 17:37:40,584 INFO L131 PetriNetUnfolder]: For 2958/2958 co-relation queries the response was YES. [2022-11-25 17:37:40,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7255 conditions, 2488 events. 1621/2488 cut-off events. For 2958/2958 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12260 event pairs, 105 based on Foata normal form. 0/1854 useless extension candidates. Maximal degree in co-relation 7243. Up to 1247 conditions per place. [2022-11-25 17:37:40,603 INFO L137 encePairwiseOnDemand]: 469/472 looper letters, 74 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-11-25 17:37:40,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 76 transitions, 553 flow [2022-11-25 17:37:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:37:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:37:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 870 transitions. [2022-11-25 17:37:40,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4608050847457627 [2022-11-25 17:37:40,606 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 870 transitions. [2022-11-25 17:37:40,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 870 transitions. [2022-11-25 17:37:40,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:40,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 870 transitions. [2022-11-25 17:37:40,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:40,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 472.0) internal successors, (2360), 5 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:40,615 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 472.0) internal successors, (2360), 5 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:40,615 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 167 flow. Second operand 4 states and 870 transitions. [2022-11-25 17:37:40,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 76 transitions, 553 flow [2022-11-25 17:37:40,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 551 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:40,622 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 165 flow [2022-11-25 17:37:40,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2022-11-25 17:37:40,625 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2022-11-25 17:37:40,626 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 165 flow [2022-11-25 17:37:40,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:40,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:40,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:40,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:40,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:40,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1963090648, now seen corresponding path program 1 times [2022-11-25 17:37:40,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:40,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306829724] [2022-11-25 17:37:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:40,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:40,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306829724] [2022-11-25 17:37:40,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306829724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:40,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345665354] [2022-11-25 17:37:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:40,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:40,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:40,951 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:40,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:37:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:41,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:37:41,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:41,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:41,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345665354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:41,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:41,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:37:41,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873086414] [2022-11-25 17:37:41,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:41,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:37:41,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:41,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:37:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:37:41,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 472 [2022-11-25 17:37:41,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 206.71428571428572) internal successors, (1447), 7 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:41,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:41,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 472 [2022-11-25 17:37:41,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:41,958 INFO L130 PetriNetUnfolder]: 3538/5377 cut-off events. [2022-11-25 17:37:41,958 INFO L131 PetriNetUnfolder]: For 6393/6393 co-relation queries the response was YES. [2022-11-25 17:37:41,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15449 conditions, 5377 events. 3538/5377 cut-off events. For 6393/6393 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29196 event pairs, 719 based on Foata normal form. 0/4005 useless extension candidates. Maximal degree in co-relation 15437. Up to 1526 conditions per place. [2022-11-25 17:37:42,006 INFO L137 encePairwiseOnDemand]: 469/472 looper letters, 127 selfloop transitions, 5 changer transitions 0/132 dead transitions. [2022-11-25 17:37:42,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 132 transitions, 953 flow [2022-11-25 17:37:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:37:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:37:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1320 transitions. [2022-11-25 17:37:42,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4661016949152542 [2022-11-25 17:37:42,011 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1320 transitions. [2022-11-25 17:37:42,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1320 transitions. [2022-11-25 17:37:42,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:42,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1320 transitions. [2022-11-25 17:37:42,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 220.0) internal successors, (1320), 6 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:42,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 472.0) internal successors, (3304), 7 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:42,025 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 472.0) internal successors, (3304), 7 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:42,025 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 165 flow. Second operand 6 states and 1320 transitions. [2022-11-25 17:37:42,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 132 transitions, 953 flow [2022-11-25 17:37:42,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 132 transitions, 950 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:37:42,034 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 198 flow [2022-11-25 17:37:42,034 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2022-11-25 17:37:42,036 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2022-11-25 17:37:42,036 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 198 flow [2022-11-25 17:37:42,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 206.71428571428572) internal successors, (1447), 7 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:42,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:42,038 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-25 17:37:42,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:42,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:42,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash 183003640, now seen corresponding path program 2 times [2022-11-25 17:37:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:42,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684737988] [2022-11-25 17:37:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:42,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:42,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684737988] [2022-11-25 17:37:42,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684737988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:42,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144467485] [2022-11-25 17:37:42,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:37:42,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:42,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:42,423 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:42,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:37:42,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:37:42,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:37:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:37:42,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:42,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:42,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144467485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:42,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:42,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:37:42,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454926452] [2022-11-25 17:37:42,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:42,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:37:42,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:37:42,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:37:42,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 472 [2022-11-25 17:37:42,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 198 flow. Second operand has 13 states, 13 states have (on average 204.76923076923077) internal successors, (2662), 13 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:42,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:42,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 472 [2022-11-25 17:37:42,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:44,676 INFO L130 PetriNetUnfolder]: 7348/11107 cut-off events. [2022-11-25 17:37:44,676 INFO L131 PetriNetUnfolder]: For 17319/17319 co-relation queries the response was YES. [2022-11-25 17:37:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32788 conditions, 11107 events. 7348/11107 cut-off events. For 17319/17319 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 62802 event pairs, 499 based on Foata normal form. 1248/9667 useless extension candidates. Maximal degree in co-relation 32773. Up to 2253 conditions per place. [2022-11-25 17:37:44,758 INFO L137 encePairwiseOnDemand]: 468/472 looper letters, 236 selfloop transitions, 20 changer transitions 0/256 dead transitions. [2022-11-25 17:37:44,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 256 transitions, 1681 flow [2022-11-25 17:37:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:37:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:37:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2650 transitions. [2022-11-25 17:37:44,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4678672316384181 [2022-11-25 17:37:44,767 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2650 transitions. [2022-11-25 17:37:44,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2650 transitions. [2022-11-25 17:37:44,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:44,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2650 transitions. [2022-11-25 17:37:44,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 220.83333333333334) internal successors, (2650), 12 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:44,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 472.0) internal successors, (6136), 13 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:44,787 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 472.0) internal successors, (6136), 13 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:44,787 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 198 flow. Second operand 12 states and 2650 transitions. [2022-11-25 17:37:44,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 256 transitions, 1681 flow [2022-11-25 17:37:44,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 256 transitions, 1593 flow, removed 33 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:44,813 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 372 flow [2022-11-25 17:37:44,814 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=372, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2022-11-25 17:37:44,815 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2022-11-25 17:37:44,815 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 372 flow [2022-11-25 17:37:44,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 204.76923076923077) internal successors, (2662), 13 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:44,817 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:44,817 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:44,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:45,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:37:45,024 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2135359811, now seen corresponding path program 2 times [2022-11-25 17:37:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:45,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121033112] [2022-11-25 17:37:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:45,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:45,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:45,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121033112] [2022-11-25 17:37:45,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121033112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:45,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820075833] [2022-11-25 17:37:45,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:37:45,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:45,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:45,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:45,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:37:45,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:37:45,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:37:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:37:45,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:45,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:45,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820075833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:45,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:45,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:37:45,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733853057] [2022-11-25 17:37:45,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:45,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:37:45,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:45,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:37:45,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:37:45,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 472 [2022-11-25 17:37:45,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 372 flow. Second operand has 13 states, 13 states have (on average 206.3846153846154) internal successors, (2683), 13 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:45,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:45,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 472 [2022-11-25 17:37:45,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:48,895 INFO L130 PetriNetUnfolder]: 15286/23005 cut-off events. [2022-11-25 17:37:48,895 INFO L131 PetriNetUnfolder]: For 67649/67649 co-relation queries the response was YES. [2022-11-25 17:37:49,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73679 conditions, 23005 events. 15286/23005 cut-off events. For 67649/67649 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 141932 event pairs, 1499 based on Foata normal form. 960/18217 useless extension candidates. Maximal degree in co-relation 73657. Up to 4611 conditions per place. [2022-11-25 17:37:49,103 INFO L137 encePairwiseOnDemand]: 469/472 looper letters, 403 selfloop transitions, 11 changer transitions 0/414 dead transitions. [2022-11-25 17:37:49,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 414 transitions, 4316 flow [2022-11-25 17:37:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:37:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:37:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2649 transitions. [2022-11-25 17:37:49,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4676906779661017 [2022-11-25 17:37:49,110 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2649 transitions. [2022-11-25 17:37:49,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2649 transitions. [2022-11-25 17:37:49,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:49,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2649 transitions. [2022-11-25 17:37:49,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 220.75) internal successors, (2649), 12 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:49,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 472.0) internal successors, (6136), 13 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:49,130 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 472.0) internal successors, (6136), 13 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:49,130 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 372 flow. Second operand 12 states and 2649 transitions. [2022-11-25 17:37:49,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 414 transitions, 4316 flow [2022-11-25 17:37:49,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 414 transitions, 3720 flow, removed 220 selfloop flow, removed 5 redundant places. [2022-11-25 17:37:49,209 INFO L231 Difference]: Finished difference. Result has 77 places, 54 transitions, 400 flow [2022-11-25 17:37:49,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=400, PETRI_PLACES=77, PETRI_TRANSITIONS=54} [2022-11-25 17:37:49,210 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2022-11-25 17:37:49,211 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 54 transitions, 400 flow [2022-11-25 17:37:49,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 206.3846153846154) internal successors, (2683), 13 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:49,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:49,212 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-25 17:37:49,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:49,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:49,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash 853599928, now seen corresponding path program 3 times [2022-11-25 17:37:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:49,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276891931] [2022-11-25 17:37:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:49,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:49,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:49,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276891931] [2022-11-25 17:37:49,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276891931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:49,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166044740] [2022-11-25 17:37:49,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:37:49,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:49,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:49,950 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:49,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:37:50,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:37:50,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:37:50,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:37:50,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:50,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:50,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166044740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:50,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:50,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-25 17:37:50,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061137870] [2022-11-25 17:37:50,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:50,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:37:50,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:37:50,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:37:50,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 472 [2022-11-25 17:37:50,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 54 transitions, 400 flow. Second operand has 25 states, 25 states have (on average 204.4) internal successors, (5110), 25 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:50,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:50,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 472 [2022-11-25 17:37:50,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:57,123 INFO L130 PetriNetUnfolder]: 31114/46705 cut-off events. [2022-11-25 17:37:57,124 INFO L131 PetriNetUnfolder]: For 324805/324805 co-relation queries the response was YES. [2022-11-25 17:37:57,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143419 conditions, 46705 events. 31114/46705 cut-off events. For 324805/324805 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 298353 event pairs, 1057 based on Foata normal form. 5232/40237 useless extension candidates. Maximal degree in co-relation 143391. Up to 9687 conditions per place. [2022-11-25 17:37:57,542 INFO L137 encePairwiseOnDemand]: 468/472 looper letters, 626 selfloop transitions, 44 changer transitions 0/670 dead transitions. [2022-11-25 17:37:57,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 670 transitions, 5541 flow [2022-11-25 17:37:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:37:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:37:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5314 transitions. [2022-11-25 17:37:57,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4691031073446328 [2022-11-25 17:37:57,556 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5314 transitions. [2022-11-25 17:37:57,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5314 transitions. [2022-11-25 17:37:57,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:57,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5314 transitions. [2022-11-25 17:37:57,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 221.41666666666666) internal successors, (5314), 24 states have internal predecessors, (5314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:57,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 472.0) internal successors, (11800), 25 states have internal predecessors, (11800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:57,590 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 472.0) internal successors, (11800), 25 states have internal predecessors, (11800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:57,590 INFO L175 Difference]: Start difference. First operand has 77 places, 54 transitions, 400 flow. Second operand 24 states and 5314 transitions. [2022-11-25 17:37:57,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 670 transitions, 5541 flow [2022-11-25 17:37:57,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 670 transitions, 4713 flow, removed 299 selfloop flow, removed 5 redundant places. [2022-11-25 17:37:57,773 INFO L231 Difference]: Finished difference. Result has 107 places, 78 transitions, 732 flow [2022-11-25 17:37:57,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=732, PETRI_PLACES=107, PETRI_TRANSITIONS=78} [2022-11-25 17:37:57,775 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 70 predicate places. [2022-11-25 17:37:57,775 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 78 transitions, 732 flow [2022-11-25 17:37:57,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 204.4) internal successors, (5110), 25 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:57,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:57,777 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:57,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:57,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:57,988 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:37:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash 992606429, now seen corresponding path program 3 times [2022-11-25 17:37:57,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:57,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789774585] [2022-11-25 17:37:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:57,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:58,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789774585] [2022-11-25 17:37:58,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789774585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720517240] [2022-11-25 17:37:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:37:58,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:58,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:58,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:58,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:37:58,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:37:58,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:37:58,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:37:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:58,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:58,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720517240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:58,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:58,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 17:37:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307030904] [2022-11-25 17:37:58,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:37:58,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:37:58,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:37:58,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 472 [2022-11-25 17:37:58,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 78 transitions, 732 flow. Second operand has 25 states, 25 states have (on average 206.2) internal successors, (5155), 25 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:58,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:58,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 472 [2022-11-25 17:37:58,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:13,131 INFO L130 PetriNetUnfolder]: 63406/94981 cut-off events. [2022-11-25 17:38:13,131 INFO L131 PetriNetUnfolder]: For 577823/577823 co-relation queries the response was YES. [2022-11-25 17:38:13,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309419 conditions, 94981 events. 63406/94981 cut-off events. For 577823/577823 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 650986 event pairs, 3059 based on Foata normal form. 3936/74761 useless extension candidates. Maximal degree in co-relation 309379. Up to 19587 conditions per place. [2022-11-25 17:38:14,172 INFO L137 encePairwiseOnDemand]: 469/472 looper letters, 1387 selfloop transitions, 23 changer transitions 0/1410 dead transitions. [2022-11-25 17:38:14,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 1410 transitions, 17264 flow [2022-11-25 17:38:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:38:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:38:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5307 transitions. [2022-11-25 17:38:14,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4684851694915254 [2022-11-25 17:38:14,188 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5307 transitions. [2022-11-25 17:38:14,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5307 transitions. [2022-11-25 17:38:14,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:14,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5307 transitions. [2022-11-25 17:38:14,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 221.125) internal successors, (5307), 24 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:14,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 472.0) internal successors, (11800), 25 states have internal predecessors, (11800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:14,222 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 472.0) internal successors, (11800), 25 states have internal predecessors, (11800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:14,222 INFO L175 Difference]: Start difference. First operand has 107 places, 78 transitions, 732 flow. Second operand 24 states and 5307 transitions. [2022-11-25 17:38:14,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 1410 transitions, 17264 flow [2022-11-25 17:38:15,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 1410 transitions, 14640 flow, removed 874 selfloop flow, removed 11 redundant places. [2022-11-25 17:38:15,180 INFO L231 Difference]: Finished difference. Result has 131 places, 90 transitions, 784 flow [2022-11-25 17:38:15,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=784, PETRI_PLACES=131, PETRI_TRANSITIONS=90} [2022-11-25 17:38:15,181 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 94 predicate places. [2022-11-25 17:38:15,182 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 90 transitions, 784 flow [2022-11-25 17:38:15,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 206.2) internal successors, (5155), 25 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:15,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:15,183 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1] [2022-11-25 17:38:15,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:15,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:38:15,397 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 17:38:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:15,398 INFO L85 PathProgramCache]: Analyzing trace with hash -6541256, now seen corresponding path program 4 times [2022-11-25 17:38:15,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:15,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300439326] [2022-11-25 17:38:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:15,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:16,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:16,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300439326] [2022-11-25 17:38:16,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300439326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:38:16,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971877751] [2022-11-25 17:38:16,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:38:16,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:38:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:38:16,307 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:38:16,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8921be7a-4f7c-4e92-afdb-b6327f9cc8be/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:38:16,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:38:16,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:38:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:38:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:16,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:38:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:17,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971877751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:38:17,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:38:17,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-11-25 17:38:17,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412268119] [2022-11-25 17:38:17,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:38:17,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 17:38:17,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:17,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 17:38:17,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:38:17,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 472 [2022-11-25 17:38:17,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 90 transitions, 784 flow. Second operand has 49 states, 49 states have (on average 204.20408163265307) internal successors, (10006), 49 states have internal predecessors, (10006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:17,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:17,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 472 [2022-11-25 17:38:17,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand