./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a938b9e3b803ef0b08d2618a78ac055be54a6e48f84c6853aab11e3467af8157 --- 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-dbf71c6-m [2022-10-17 10:18:59,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:18:59,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:18:59,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:18:59,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:18:59,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:18:59,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:18:59,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:18:59,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:18:59,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:18:59,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:18:59,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:18:59,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:18:59,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:18:59,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:18:59,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:18:59,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:18:59,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:18:59,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:18:59,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:18:59,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:18:59,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:18:59,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:18:59,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:18:59,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:18:59,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:18:59,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:18:59,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:18:59,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:18:59,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:18:59,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:18:59,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:18:59,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:18:59,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:18:59,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:18:59,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:18:59,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:18:59,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:18:59,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:18:59,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:18:59,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:18:59,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:18:59,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:18:59,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:18:59,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:18:59,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:18:59,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:18:59,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:18:59,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:18:59,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:18:59,969 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:18:59,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:18:59,971 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:18:59,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:18:59,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:18:59,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:18:59,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:18:59,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:18:59,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:18:59,972 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:18:59,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:18:59,973 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:18:59,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:18:59,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:18:59,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:18:59,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:18:59,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:18:59,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:18:59,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:18:59,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:18:59,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:18:59,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:18:59,975 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:18:59,975 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:18:59,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:18:59,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a938b9e3b803ef0b08d2618a78ac055be54a6e48f84c6853aab11e3467af8157 [2022-10-17 10:19:00,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:19:00,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:19:00,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:19:00,361 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:19:00,362 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:19:00,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread/fib_unsafe-7.i [2022-10-17 10:19:00,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/data/af9eaa31c/ea1fa9747e6e4f07979ff8d49c9c2aab/FLAGe671360f2 [2022-10-17 10:19:00,950 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:19:00,950 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/sv-benchmarks/c/pthread/fib_unsafe-7.i [2022-10-17 10:19:00,973 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/data/af9eaa31c/ea1fa9747e6e4f07979ff8d49c9c2aab/FLAGe671360f2 [2022-10-17 10:19:01,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/data/af9eaa31c/ea1fa9747e6e4f07979ff8d49c9c2aab [2022-10-17 10:19:01,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:19:01,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:19:01,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:19:01,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:19:01,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:19:01,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd7af4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01, skipping insertion in model container [2022-10-17 10:19:01,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:19:01,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:19:01,735 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/sv-benchmarks/c/pthread/fib_unsafe-7.i[30811,30824] [2022-10-17 10:19:01,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:19:01,749 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:19:01,822 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/sv-benchmarks/c/pthread/fib_unsafe-7.i[30811,30824] [2022-10-17 10:19:01,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:19:01,876 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:19:01,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01 WrapperNode [2022-10-17 10:19:01,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:19:01,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:19:01,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:19:01,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:19:01,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,955 INFO L138 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-10-17 10:19:01,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:19:01,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:19:01,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:19:01,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:19:01,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,993 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:01,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:02,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:19:02,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:19:02,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:19:02,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:19:02,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (1/1) ... [2022-10-17 10:19:02,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:19:02,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:19:02,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:19:02,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:19:02,088 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-10-17 10:19:02,088 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-10-17 10:19:02,088 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-10-17 10:19:02,089 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-10-17 10:19:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:19:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 10:19:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:19:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:19:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:19:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:19:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 10:19:02,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:19:02,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:19:02,092 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:19:02,259 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:19:02,261 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:19:02,547 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:19:02,564 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:19:02,564 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 10:19:02,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:19:02 BoogieIcfgContainer [2022-10-17 10:19:02,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:19:02,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:19:02,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:19:02,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:19:02,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:19:01" (1/3) ... [2022-10-17 10:19:02,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac5f983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:19:02, skipping insertion in model container [2022-10-17 10:19:02,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:01" (2/3) ... [2022-10-17 10:19:02,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac5f983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:19:02, skipping insertion in model container [2022-10-17 10:19:02,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:19:02" (3/3) ... [2022-10-17 10:19:02,578 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2022-10-17 10:19:02,591 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:19:02,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:19:02,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:19:02,603 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:19:02,701 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:19:02,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2022-10-17 10:19:02,845 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-10-17 10:19:02,845 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:19:02,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-10-17 10:19:02,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 96 transitions, 202 flow [2022-10-17 10:19:02,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 194 flow [2022-10-17 10:19:02,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:19:02,877 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;@5ff24505, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:19:02,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:19:02,901 INFO L130 PetriNetUnfolder]: 6/84 cut-off events. [2022-10-17 10:19:02,901 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:19:02,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:19:02,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:02,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:19:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:02,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1927097680, now seen corresponding path program 1 times [2022-10-17 10:19:02,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:02,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896545159] [2022-10-17 10:19:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:02,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:03,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:03,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896545159] [2022-10-17 10:19:03,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896545159] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:19:03,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:19:03,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:19:03,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484602122] [2022-10-17 10:19:03,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:19:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:19:03,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:19:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:19:03,263 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 96 [2022-10-17 10:19:03,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:19:03,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 96 [2022-10-17 10:19:03,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:19:03,335 INFO L130 PetriNetUnfolder]: 3/89 cut-off events. [2022-10-17 10:19:03,343 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:19:03,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 3/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 5/90 useless extension candidates. Maximal degree in co-relation 60. Up to 3 conditions per place. [2022-10-17 10:19:03,346 INFO L137 encePairwiseOnDemand]: 92/96 looper letters, 2 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2022-10-17 10:19:03,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 188 flow [2022-10-17 10:19:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:19:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:19:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2022-10-17 10:19:03,366 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2022-10-17 10:19:03,367 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2022-10-17 10:19:03,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2022-10-17 10:19:03,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:19:03,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2022-10-17 10:19:03,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,390 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,392 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 194 flow. Second operand 2 states and 184 transitions. [2022-10-17 10:19:03,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 188 flow [2022-10-17 10:19:03,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-10-17 10:19:03,401 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 182 flow [2022-10-17 10:19:03,404 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2022-10-17 10:19:03,407 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2022-10-17 10:19:03,408 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 182 flow [2022-10-17 10:19:03,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:19:03,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:03,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:19:03,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:19:03,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash 560415153, now seen corresponding path program 1 times [2022-10-17 10:19:03,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:03,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003227001] [2022-10-17 10:19:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:03,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:03,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:03,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003227001] [2022-10-17 10:19:03,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003227001] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:19:03,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:19:03,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:19:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056012078] [2022-10-17 10:19:03,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:19:03,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:19:03,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:03,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:19:03,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:19:03,655 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 96 [2022-10-17 10:19:03,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:19:03,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 96 [2022-10-17 10:19:03,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:19:03,735 INFO L130 PetriNetUnfolder]: 3/95 cut-off events. [2022-10-17 10:19:03,737 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:19:03,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 95 events. 3/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-10-17 10:19:03,741 INFO L137 encePairwiseOnDemand]: 93/96 looper letters, 9 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-10-17 10:19:03,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 210 flow [2022-10-17 10:19:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:19:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:19:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2022-10-17 10:19:03,749 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.90625 [2022-10-17 10:19:03,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2022-10-17 10:19:03,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2022-10-17 10:19:03,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:19:03,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2022-10-17 10:19:03,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,757 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 182 flow. Second operand 3 states and 261 transitions. [2022-10-17 10:19:03,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 210 flow [2022-10-17 10:19:03,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:19:03,762 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 194 flow [2022-10-17 10:19:03,762 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2022-10-17 10:19:03,763 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2022-10-17 10:19:03,764 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 194 flow [2022-10-17 10:19:03,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:03,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:19:03,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:03,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:19:03,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:19:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:03,766 INFO L85 PathProgramCache]: Analyzing trace with hash -951035470, now seen corresponding path program 1 times [2022-10-17 10:19:03,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:03,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199191343] [2022-10-17 10:19:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:03,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:03,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199191343] [2022-10-17 10:19:03,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199191343] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:19:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657570026] [2022-10-17 10:19:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:03,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:19:03,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:19:03,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:19:03,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:19:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:19:04,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:19:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:04,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:19:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657570026] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:19:04,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:19:04,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:19:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637641907] [2022-10-17 10:19:04,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:19:04,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:19:04,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:19:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:19:04,264 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-10-17 10:19:04,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:04,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:19:04,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-10-17 10:19:04,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:19:04,413 INFO L130 PetriNetUnfolder]: 3/104 cut-off events. [2022-10-17 10:19:04,413 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-10-17 10:19:04,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 104 events. 3/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 133. Up to 6 conditions per place. [2022-10-17 10:19:04,418 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2022-10-17 10:19:04,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 250 flow [2022-10-17 10:19:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:19:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-10-17 10:19:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions. [2022-10-17 10:19:04,421 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556 [2022-10-17 10:19:04,421 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions. [2022-10-17 10:19:04,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions. [2022-10-17 10:19:04,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:19:04,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions. [2022-10-17 10:19:04,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.33333333333333) internal successors, (750), 9 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:04,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:04,430 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:04,430 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 194 flow. Second operand 9 states and 750 transitions. [2022-10-17 10:19:04,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 250 flow [2022-10-17 10:19:04,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:19:04,437 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 242 flow [2022-10-17 10:19:04,438 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2022-10-17 10:19:04,442 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2022-10-17 10:19:04,442 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 242 flow [2022-10-17 10:19:04,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:04,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:19:04,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:04,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:19:04,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:19:04,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:19:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:04,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1666707666, now seen corresponding path program 2 times [2022-10-17 10:19:04,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:04,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548043502] [2022-10-17 10:19:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:04,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:04,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548043502] [2022-10-17 10:19:04,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548043502] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:19:04,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646566494] [2022-10-17 10:19:04,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:19:04,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:19:04,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:19:04,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:19:05,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:19:05,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:19:05,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:19:05,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:19:05,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:19:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:05,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:19:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:05,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646566494] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:19:05,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:19:05,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-10-17 10:19:05,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863070982] [2022-10-17 10:19:05,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:19:05,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:19:05,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:05,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:19:05,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:19:05,385 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-10-17 10:19:05,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 242 flow. Second operand has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:05,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:19:05,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-10-17 10:19:05,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:19:05,639 INFO L130 PetriNetUnfolder]: 3/132 cut-off events. [2022-10-17 10:19:05,639 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-10-17 10:19:05,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 132 events. 3/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2022-10-17 10:19:05,642 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 14 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2022-10-17 10:19:05,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 114 transitions, 408 flow [2022-10-17 10:19:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-17 10:19:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-10-17 10:19:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1740 transitions. [2022-10-17 10:19:05,649 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2022-10-17 10:19:05,649 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1740 transitions. [2022-10-17 10:19:05,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1740 transitions. [2022-10-17 10:19:05,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:19:05,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1740 transitions. [2022-10-17 10:19:05,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.85714285714286) internal successors, (1740), 21 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:05,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:05,665 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:05,665 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 242 flow. Second operand 21 states and 1740 transitions. [2022-10-17 10:19:05,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 114 transitions, 408 flow [2022-10-17 10:19:05,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-10-17 10:19:05,672 INFO L231 Difference]: Finished difference. Result has 129 places, 109 transitions, 366 flow [2022-10-17 10:19:05,672 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=366, PETRI_PLACES=129, PETRI_TRANSITIONS=109} [2022-10-17 10:19:05,674 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places. [2022-10-17 10:19:05,674 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 366 flow [2022-10-17 10:19:05,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:05,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:19:05,675 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:05,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:19:05,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:19:05,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:19:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:05,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1283180782, now seen corresponding path program 3 times [2022-10-17 10:19:05,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:05,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035779777] [2022-10-17 10:19:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:05,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:06,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:06,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035779777] [2022-10-17 10:19:06,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035779777] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:19:06,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084847663] [2022-10-17 10:19:06,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:19:06,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:19:06,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:19:06,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:19:06,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:19:06,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-10-17 10:19:06,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:19:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:19:06,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:19:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:06,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:19:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:06,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084847663] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:19:06,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:19:06,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-10-17 10:19:06,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041039886] [2022-10-17 10:19:06,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:19:06,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-17 10:19:06,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-17 10:19:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-10-17 10:19:06,988 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-10-17 10:19:06,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 109 transitions, 366 flow. Second operand has 34 states, 34 states have (on average 83.0) internal successors, (2822), 34 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:06,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:19:06,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-10-17 10:19:06,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:19:07,674 INFO L130 PetriNetUnfolder]: 3/188 cut-off events. [2022-10-17 10:19:07,674 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2022-10-17 10:19:07,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 188 events. 3/188 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 438. Up to 27 conditions per place. [2022-10-17 10:19:07,680 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 22 selfloop transitions, 45 changer transitions 0/146 dead transitions. [2022-10-17 10:19:07,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 146 transitions, 788 flow [2022-10-17 10:19:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-10-17 10:19:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-10-17 10:19:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3720 transitions. [2022-10-17 10:19:07,693 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2022-10-17 10:19:07,693 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3720 transitions. [2022-10-17 10:19:07,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3720 transitions. [2022-10-17 10:19:07,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:19:07,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3720 transitions. [2022-10-17 10:19:07,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 82.66666666666667) internal successors, (3720), 45 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:07,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 96.0) internal successors, (4416), 46 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:07,725 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 96.0) internal successors, (4416), 46 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:07,725 INFO L175 Difference]: Start difference. First operand has 129 places, 109 transitions, 366 flow. Second operand 45 states and 3720 transitions. [2022-10-17 10:19:07,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 146 transitions, 788 flow [2022-10-17 10:19:07,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 146 transitions, 748 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-10-17 10:19:07,746 INFO L231 Difference]: Finished difference. Result has 176 places, 134 transitions, 644 flow [2022-10-17 10:19:07,747 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=644, PETRI_PLACES=176, PETRI_TRANSITIONS=134} [2022-10-17 10:19:07,749 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 82 predicate places. [2022-10-17 10:19:07,750 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 134 transitions, 644 flow [2022-10-17 10:19:07,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 83.0) internal successors, (2822), 34 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:07,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:19:07,753 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:07,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-17 10:19:07,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:19:07,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:19:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:07,969 INFO L85 PathProgramCache]: Analyzing trace with hash 835265426, now seen corresponding path program 4 times [2022-10-17 10:19:07,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:07,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278551416] [2022-10-17 10:19:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:07,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:09,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278551416] [2022-10-17 10:19:09,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278551416] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:19:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751069492] [2022-10-17 10:19:09,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:19:09,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:19:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:19:09,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:19:09,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be1c10b-8939-40b1-9d94-504a8b3333b1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:19:09,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:19:09,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:19:09,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-17 10:19:09,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:19:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 572 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:12,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:19:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:19:16,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751069492] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:19:16,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:19:16,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 51, 51] total 130 [2022-10-17 10:19:16,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395965655] [2022-10-17 10:19:16,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:19:16,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-10-17 10:19:16,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-10-17 10:19:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1428, Invalid=15342, Unknown=0, NotChecked=0, Total=16770 [2022-10-17 10:19:16,546 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 96 [2022-10-17 10:19:16,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 134 transitions, 644 flow. Second operand has 130 states, 130 states have (on average 62.86923076923077) internal successors, (8173), 130 states have internal predecessors, (8173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:19:16,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:19:16,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 96 [2022-10-17 10:19:16,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand