./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS --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 ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:31:35,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:31:35,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:31:35,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:31:35,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:31:35,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:31:35,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:31:35,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:31:35,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:31:35,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:31:35,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:31:35,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:31:35,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:31:35,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:31:35,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:31:35,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:31:35,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:31:35,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:31:35,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:31:35,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:31:35,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:31:35,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:31:35,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:31:35,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:31:35,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:31:35,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:31:35,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:31:35,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:31:35,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:31:35,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:31:35,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:31:35,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:31:35,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:31:35,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:31:35,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:31:35,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:31:35,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:31:35,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:31:35,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:31:35,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:31:35,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:31:35,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:31:35,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:31:35,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:31:35,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:31:35,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:31:35,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:31:35,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:31:35,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:31:35,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:31:35,947 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:31:35,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:31:35,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:31:35,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:31:35,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:31:35,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:31:35,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:31:35,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:31:35,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:31:35,950 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:31:35,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:31:35,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:31:35,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:31:35,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:31:35,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:31:35,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:31:35,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:31:35,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:31:35,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:31:35,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:31:35,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:31:35,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:31:35,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:31:35,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:31:35,954 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:31:35,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:31:35,954 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_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 [2022-11-23 02:31:36,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:31:36,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:31:36,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:31:36,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:31:36,318 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:31:36,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2022-11-23 02:31:39,424 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:31:39,661 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:31:39,661 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2022-11-23 02:31:39,678 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/data/61d52052d/55139e97b11349688d3e1b7538201ba5/FLAGb0dc7d891 [2022-11-23 02:31:39,693 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/data/61d52052d/55139e97b11349688d3e1b7538201ba5 [2022-11-23 02:31:39,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:31:39,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:31:39,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:31:39,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:31:39,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:31:39,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:31:39" (1/1) ... [2022-11-23 02:31:39,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d91d36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:39, skipping insertion in model container [2022-11-23 02:31:39,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:31:39" (1/1) ... [2022-11-23 02:31:39,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:31:39,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:31:39,991 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[913,926] [2022-11-23 02:31:40,070 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[5977,5990] [2022-11-23 02:31:40,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:31:40,212 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:31:40,231 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[913,926] [2022-11-23 02:31:40,249 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[5977,5990] [2022-11-23 02:31:40,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:31:40,344 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:31:40,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40 WrapperNode [2022-11-23 02:31:40,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:31:40,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:31:40,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:31:40,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:31:40,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,437 INFO L138 Inliner]: procedures = 60, calls = 67, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 712 [2022-11-23 02:31:40,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:31:40,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:31:40,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:31:40,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:31:40,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,476 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:31:40,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:31:40,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:31:40,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:31:40,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (1/1) ... [2022-11-23 02:31:40,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:31:40,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:31:40,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:31:40,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:31:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:31:40,573 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 02:31:40,573 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 02:31:40,573 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-23 02:31:40,573 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-23 02:31:40,574 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 02:31:40,574 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 02:31:40,574 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 02:31:40,574 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 02:31:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 02:31:40,575 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 02:31:40,575 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 02:31:40,575 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 02:31:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 02:31:40,576 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 02:31:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:31:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 02:31:40,576 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 02:31:40,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:31:40,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:31:40,577 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 02:31:40,577 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 02:31:40,577 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-23 02:31:40,577 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-23 02:31:40,751 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:31:40,754 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:31:41,576 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:31:41,587 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:31:41,587 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-23 02:31:41,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:31:41 BoogieIcfgContainer [2022-11-23 02:31:41,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:31:41,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:31:41,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:31:41,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:31:41,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:31:39" (1/3) ... [2022-11-23 02:31:41,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c399500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:31:41, skipping insertion in model container [2022-11-23 02:31:41,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:40" (2/3) ... [2022-11-23 02:31:41,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c399500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:31:41, skipping insertion in model container [2022-11-23 02:31:41,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:31:41" (3/3) ... [2022-11-23 02:31:41,600 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2022-11-23 02:31:41,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:31:41,620 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 02:31:41,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:31:41,702 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;@4836edb4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:31:41,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 02:31:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-23 02:31:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 02:31:41,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:41,732 INFO L195 NwaCegarLoop]: 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] [2022-11-23 02:31:41,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash -953270584, now seen corresponding path program 1 times [2022-11-23 02:31:41,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:41,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053649423] [2022-11-23 02:31:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:41,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:42,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 02:31:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:42,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-23 02:31:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:42,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:42,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053649423] [2022-11-23 02:31:42,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053649423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:42,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:42,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:31:42,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723642831] [2022-11-23 02:31:42,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:42,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:31:42,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:31:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:31:42,202 INFO L87 Difference]: Start difference. First operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:31:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:42,762 INFO L93 Difference]: Finished difference Result 674 states and 1072 transitions. [2022-11-23 02:31:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:31:42,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-23 02:31:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:42,777 INFO L225 Difference]: With dead ends: 674 [2022-11-23 02:31:42,777 INFO L226 Difference]: Without dead ends: 371 [2022-11-23 02:31:42,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:31:42,785 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 597 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:42,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 630 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 02:31:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-23 02:31:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 365. [2022-11-23 02:31:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 320 states have (on average 1.496875) internal successors, (479), 325 states have internal predecessors, (479), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2022-11-23 02:31:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 545 transitions. [2022-11-23 02:31:42,860 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 545 transitions. Word has length 44 [2022-11-23 02:31:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:42,860 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 545 transitions. [2022-11-23 02:31:42,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:31:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 545 transitions. [2022-11-23 02:31:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 02:31:42,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:42,864 INFO L195 NwaCegarLoop]: 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] [2022-11-23 02:31:42,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:31:42,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:42,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:42,865 INFO L85 PathProgramCache]: Analyzing trace with hash 215630895, now seen corresponding path program 1 times [2022-11-23 02:31:42,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:42,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459882889] [2022-11-23 02:31:42,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:42,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:42,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 02:31:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:42,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-23 02:31:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:42,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459882889] [2022-11-23 02:31:42,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459882889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:42,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:42,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:31:42,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198478062] [2022-11-23 02:31:42,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:42,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:31:42,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:42,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:31:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:31:42,957 INFO L87 Difference]: Start difference. First operand 365 states and 545 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:31:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:43,513 INFO L93 Difference]: Finished difference Result 613 states and 885 transitions. [2022-11-23 02:31:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:31:43,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-23 02:31:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:43,521 INFO L225 Difference]: With dead ends: 613 [2022-11-23 02:31:43,521 INFO L226 Difference]: Without dead ends: 489 [2022-11-23 02:31:43,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:31:43,527 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 250 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:43,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 846 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 02:31:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-23 02:31:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 432. [2022-11-23 02:31:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 381 states have (on average 1.4776902887139107) internal successors, (563), 386 states have internal predecessors, (563), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (37), 31 states have call predecessors, (37), 31 states have call successors, (37) [2022-11-23 02:31:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 635 transitions. [2022-11-23 02:31:43,594 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 635 transitions. Word has length 45 [2022-11-23 02:31:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:43,595 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 635 transitions. [2022-11-23 02:31:43,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:31:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 635 transitions. [2022-11-23 02:31:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 02:31:43,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:43,603 INFO L195 NwaCegarLoop]: 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] [2022-11-23 02:31:43,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 02:31:43,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1068726566, now seen corresponding path program 1 times [2022-11-23 02:31:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:43,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146675851] [2022-11-23 02:31:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:43,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:43,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 02:31:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:43,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-23 02:31:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:43,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:43,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146675851] [2022-11-23 02:31:43,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146675851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:43,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:43,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:31:43,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437901336] [2022-11-23 02:31:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:43,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:31:43,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:31:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:31:43,680 INFO L87 Difference]: Start difference. First operand 432 states and 635 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:31:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:44,046 INFO L93 Difference]: Finished difference Result 840 states and 1194 transitions. [2022-11-23 02:31:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:31:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-23 02:31:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:44,050 INFO L225 Difference]: With dead ends: 840 [2022-11-23 02:31:44,051 INFO L226 Difference]: Without dead ends: 649 [2022-11-23 02:31:44,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:31:44,053 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 606 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:44,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 628 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:31:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-23 02:31:44,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 597. [2022-11-23 02:31:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 527 states have (on average 1.4288425047438331) internal successors, (753), 535 states have internal predecessors, (753), 46 states have call successors, (46), 22 states have call predecessors, (46), 22 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2022-11-23 02:31:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 853 transitions. [2022-11-23 02:31:44,116 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 853 transitions. Word has length 45 [2022-11-23 02:31:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:44,117 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 853 transitions. [2022-11-23 02:31:44,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 02:31:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 853 transitions. [2022-11-23 02:31:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 02:31:44,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:44,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 02:31:44,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 02:31:44,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash -642295496, now seen corresponding path program 1 times [2022-11-23 02:31:44,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:44,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137117274] [2022-11-23 02:31:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:44,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:44,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 02:31:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-23 02:31:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:44,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-23 02:31:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 02:31:44,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:44,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137117274] [2022-11-23 02:31:44,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137117274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:44,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:44,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:31:44,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340753389] [2022-11-23 02:31:44,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:44,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:31:44,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:44,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:31:44,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:31:44,243 INFO L87 Difference]: Start difference. First operand 597 states and 853 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 02:31:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:44,775 INFO L93 Difference]: Finished difference Result 1181 states and 1638 transitions. [2022-11-23 02:31:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:31:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-11-23 02:31:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:44,780 INFO L225 Difference]: With dead ends: 1181 [2022-11-23 02:31:44,780 INFO L226 Difference]: Without dead ends: 825 [2022-11-23 02:31:44,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:31:44,791 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 234 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:44,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 898 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 02:31:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-11-23 02:31:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 787. [2022-11-23 02:31:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 693 states have (on average 1.3751803751803753) internal successors, (953), 703 states have internal predecessors, (953), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2022-11-23 02:31:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1091 transitions. [2022-11-23 02:31:44,868 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1091 transitions. Word has length 62 [2022-11-23 02:31:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:44,870 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1091 transitions. [2022-11-23 02:31:44,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 02:31:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1091 transitions. [2022-11-23 02:31:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 02:31:44,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:44,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 02:31:44,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 02:31:44,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:44,880 INFO L85 PathProgramCache]: Analyzing trace with hash -897620696, now seen corresponding path program 1 times [2022-11-23 02:31:44,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:44,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449871298] [2022-11-23 02:31:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:44,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:44,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 02:31:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:44,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-23 02:31:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:44,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-23 02:31:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 02:31:45,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:45,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449871298] [2022-11-23 02:31:45,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449871298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:45,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:45,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:31:45,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242743067] [2022-11-23 02:31:45,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:45,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:31:45,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:45,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:31:45,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:31:45,014 INFO L87 Difference]: Start difference. First operand 787 states and 1091 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 02:31:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:45,390 INFO L93 Difference]: Finished difference Result 1440 states and 1944 transitions. [2022-11-23 02:31:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:31:45,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-11-23 02:31:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:45,398 INFO L225 Difference]: With dead ends: 1440 [2022-11-23 02:31:45,398 INFO L226 Difference]: Without dead ends: 986 [2022-11-23 02:31:45,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:31:45,403 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 593 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:45,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 626 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:31:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-11-23 02:31:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 931. [2022-11-23 02:31:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 821 states have (on average 1.3447015834348355) internal successors, (1104), 833 states have internal predecessors, (1104), 68 states have call successors, (68), 36 states have call predecessors, (68), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2022-11-23 02:31:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1264 transitions. [2022-11-23 02:31:45,487 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1264 transitions. Word has length 67 [2022-11-23 02:31:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:45,488 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1264 transitions. [2022-11-23 02:31:45,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 02:31:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1264 transitions. [2022-11-23 02:31:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-23 02:31:45,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:45,491 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 02:31:45,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 02:31:45,492 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:45,493 INFO L85 PathProgramCache]: Analyzing trace with hash -252493793, now seen corresponding path program 1 times [2022-11-23 02:31:45,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:45,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641320814] [2022-11-23 02:31:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:45,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:45,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 02:31:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:45,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-23 02:31:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:45,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-23 02:31:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:31:45,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:45,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641320814] [2022-11-23 02:31:45,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641320814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:31:45,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182314718] [2022-11-23 02:31:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:45,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:31:45,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:31:45,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:31:45,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:31:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:45,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 02:31:45,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:31:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:45,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:31:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 02:31:46,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182314718] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:31:46,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:31:46,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-23 02:31:46,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707873698] [2022-11-23 02:31:46,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:46,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:31:46,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:46,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:31:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:31:46,011 INFO L87 Difference]: Start difference. First operand 931 states and 1264 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 02:31:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:46,216 INFO L93 Difference]: Finished difference Result 987 states and 1332 transitions. [2022-11-23 02:31:46,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:31:46,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-11-23 02:31:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:46,223 INFO L225 Difference]: With dead ends: 987 [2022-11-23 02:31:46,223 INFO L226 Difference]: Without dead ends: 984 [2022-11-23 02:31:46,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 02:31:46,227 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 811 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:46,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 546 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:31:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-23 02:31:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 930. [2022-11-23 02:31:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 821 states have (on average 1.3422655298416566) internal successors, (1102), 832 states have internal predecessors, (1102), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2022-11-23 02:31:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1261 transitions. [2022-11-23 02:31:46,315 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1261 transitions. Word has length 68 [2022-11-23 02:31:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:46,317 INFO L495 AbstractCegarLoop]: Abstraction has 930 states and 1261 transitions. [2022-11-23 02:31:46,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 02:31:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1261 transitions. [2022-11-23 02:31:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 02:31:46,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:46,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 02:31:46,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:31:46,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:31:46,526 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:46,526 INFO L85 PathProgramCache]: Analyzing trace with hash 761646347, now seen corresponding path program 1 times [2022-11-23 02:31:46,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:46,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661111108] [2022-11-23 02:31:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:46,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:46,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 02:31:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:46,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-23 02:31:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:46,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-23 02:31:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:31:46,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661111108] [2022-11-23 02:31:46,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661111108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:31:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91480333] [2022-11-23 02:31:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:46,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:31:46,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:31:46,715 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:31:46,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:31:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:46,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:31:46,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:31:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:47,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:31:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 02:31:47,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91480333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:31:47,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:31:47,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-23 02:31:47,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484420264] [2022-11-23 02:31:47,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:31:47,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 02:31:47,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:47,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 02:31:47,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-23 02:31:47,270 INFO L87 Difference]: Start difference. First operand 930 states and 1261 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 02:31:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:49,038 INFO L93 Difference]: Finished difference Result 2630 states and 3481 transitions. [2022-11-23 02:31:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 02:31:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-11-23 02:31:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:49,047 INFO L225 Difference]: With dead ends: 2630 [2022-11-23 02:31:49,047 INFO L226 Difference]: Without dead ends: 2086 [2022-11-23 02:31:49,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 02:31:49,051 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 1343 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:49,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1370 Valid, 2597 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 02:31:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2022-11-23 02:31:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1319. [2022-11-23 02:31:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1171 states have (on average 1.3116994022203246) internal successors, (1536), 1190 states have internal predecessors, (1536), 87 states have call successors, (87), 50 states have call predecessors, (87), 59 states have return successors, (126), 79 states have call predecessors, (126), 84 states have call successors, (126) [2022-11-23 02:31:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1749 transitions. [2022-11-23 02:31:49,177 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1749 transitions. Word has length 69 [2022-11-23 02:31:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:49,177 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1749 transitions. [2022-11-23 02:31:49,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 02:31:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1749 transitions. [2022-11-23 02:31:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 02:31:49,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:49,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 02:31:49,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 02:31:49,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 02:31:49,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1915961298, now seen corresponding path program 1 times [2022-11-23 02:31:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:49,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417613086] [2022-11-23 02:31:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:49,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:49,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 02:31:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:49,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-23 02:31:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:49,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-23 02:31:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:49,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-23 02:31:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 02:31:49,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417613086] [2022-11-23 02:31:49,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417613086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:49,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:49,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:31:49,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267207636] [2022-11-23 02:31:49,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:31:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:31:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:31:49,450 INFO L87 Difference]: Start difference. First operand 1319 states and 1749 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 02:31:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:49,897 INFO L93 Difference]: Finished difference Result 2084 states and 2736 transitions. [2022-11-23 02:31:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:31:49,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-11-23 02:31:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:49,905 INFO L225 Difference]: With dead ends: 2084 [2022-11-23 02:31:49,905 INFO L226 Difference]: Without dead ends: 1239 [2022-11-23 02:31:49,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:31:49,911 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 608 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:49,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 640 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:31:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-11-23 02:31:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1182. [2022-11-23 02:31:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1050 states have (on average 1.3123809523809524) internal successors, (1378), 1068 states have internal predecessors, (1378), 79 states have call successors, (79), 44 states have call predecessors, (79), 51 states have return successors, (112), 70 states have call predecessors, (112), 76 states have call successors, (112) [2022-11-23 02:31:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1569 transitions. [2022-11-23 02:31:50,006 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1569 transitions. Word has length 88 [2022-11-23 02:31:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:50,006 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1569 transitions. [2022-11-23 02:31:50,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 02:31:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1569 transitions. [2022-11-23 02:31:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 02:31:50,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:50,016 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 02:31:50,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 02:31:50,017 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1247723609, now seen corresponding path program 1 times [2022-11-23 02:31:50,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:50,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004156995] [2022-11-23 02:31:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:50,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-23 02:31:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-23 02:31:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-23 02:31:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-23 02:31:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-23 02:31:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 02:31:50,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:50,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004156995] [2022-11-23 02:31:50,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004156995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:31:50,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815867573] [2022-11-23 02:31:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:50,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:31:50,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:31:50,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:31:50,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:31:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 02:31:50,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:31:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 02:31:50,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:31:50,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815867573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:50,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:31:50,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 02:31:50,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276956685] [2022-11-23 02:31:50,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:50,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:31:50,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:50,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:31:50,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:31:50,346 INFO L87 Difference]: Start difference. First operand 1182 states and 1569 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 02:31:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:50,436 INFO L93 Difference]: Finished difference Result 1561 states and 2037 transitions. [2022-11-23 02:31:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:31:50,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-11-23 02:31:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:50,439 INFO L225 Difference]: With dead ends: 1561 [2022-11-23 02:31:50,439 INFO L226 Difference]: Without dead ends: 235 [2022-11-23 02:31:50,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:31:50,444 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 62 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:50,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 928 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 02:31:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-23 02:31:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-11-23 02:31:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5533980582524272) internal successors, (320), 208 states have internal predecessors, (320), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 02:31:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 362 transitions. [2022-11-23 02:31:50,461 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 362 transitions. Word has length 103 [2022-11-23 02:31:50,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:50,461 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 362 transitions. [2022-11-23 02:31:50,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 02:31:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 362 transitions. [2022-11-23 02:31:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:31:50,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:50,463 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:31:50,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 02:31:50,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c61080a-3f8b-4b51-8b7b-9244a272e7e2/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:31:50,668 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash 490472779, now seen corresponding path program 1 times [2022-11-23 02:31:50,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:50,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104355085] [2022-11-23 02:31:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:50,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:31:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:31:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:31:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:31:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:31:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:50,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:50,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104355085] [2022-11-23 02:31:50,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104355085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:50,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:50,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 02:31:50,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980191504] [2022-11-23 02:31:50,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:50,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:31:50,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:50,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:31:50,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:31:50,807 INFO L87 Difference]: Start difference. First operand 235 states and 362 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:31:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:51,894 INFO L93 Difference]: Finished difference Result 536 states and 840 transitions. [2022-11-23 02:31:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:31:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:31:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:51,897 INFO L225 Difference]: With dead ends: 536 [2022-11-23 02:31:51,898 INFO L226 Difference]: Without dead ends: 311 [2022-11-23 02:31:51,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:31:51,899 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 595 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:51,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 477 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 02:31:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-23 02:31:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 235. [2022-11-23 02:31:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 208 states have internal predecessors, (319), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 02:31:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 361 transitions. [2022-11-23 02:31:51,931 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 361 transitions. Word has length 113 [2022-11-23 02:31:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:51,931 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 361 transitions. [2022-11-23 02:31:51,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:31:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 361 transitions. [2022-11-23 02:31:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:31:51,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:51,933 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:31:51,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 02:31:51,934 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:51,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1937785843, now seen corresponding path program 1 times [2022-11-23 02:31:51,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:51,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586444424] [2022-11-23 02:31:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:51,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:52,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:31:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:52,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:31:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:52,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:31:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:52,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:31:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:52,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:31:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:52,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:52,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586444424] [2022-11-23 02:31:52,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586444424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:52,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:52,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 02:31:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37037697] [2022-11-23 02:31:52,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:52,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:31:52,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:31:52,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:31:52,117 INFO L87 Difference]: Start difference. First operand 235 states and 361 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:31:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:54,009 INFO L93 Difference]: Finished difference Result 833 states and 1312 transitions. [2022-11-23 02:31:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:31:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:31:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:54,013 INFO L225 Difference]: With dead ends: 833 [2022-11-23 02:31:54,013 INFO L226 Difference]: Without dead ends: 613 [2022-11-23 02:31:54,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-23 02:31:54,015 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 887 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:54,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 835 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 02:31:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-23 02:31:54,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 460. [2022-11-23 02:31:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 409 states have (on average 1.5623471882640587) internal successors, (639), 412 states have internal predecessors, (639), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2022-11-23 02:31:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 714 transitions. [2022-11-23 02:31:54,092 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 714 transitions. Word has length 113 [2022-11-23 02:31:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:54,094 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 714 transitions. [2022-11-23 02:31:54,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:31:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 714 transitions. [2022-11-23 02:31:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:31:54,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:54,096 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:31:54,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 02:31:54,096 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash -943533047, now seen corresponding path program 1 times [2022-11-23 02:31:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:54,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030660191] [2022-11-23 02:31:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:54,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:31:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:54,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:31:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:54,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:31:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:31:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:54,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:31:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:54,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:54,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030660191] [2022-11-23 02:31:54,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030660191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:54,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:54,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:31:54,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592654828] [2022-11-23 02:31:54,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:54,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:31:54,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:31:54,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:31:54,286 INFO L87 Difference]: Start difference. First operand 460 states and 714 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:31:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:56,715 INFO L93 Difference]: Finished difference Result 1366 states and 2152 transitions. [2022-11-23 02:31:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:31:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:31:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:56,731 INFO L225 Difference]: With dead ends: 1366 [2022-11-23 02:31:56,732 INFO L226 Difference]: Without dead ends: 921 [2022-11-23 02:31:56,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:31:56,734 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 896 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:56,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1549 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 02:31:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-11-23 02:31:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 670. [2022-11-23 02:31:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 597 states have (on average 1.5561139028475712) internal successors, (929), 601 states have internal predecessors, (929), 52 states have call successors, (52), 19 states have call predecessors, (52), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2022-11-23 02:31:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1036 transitions. [2022-11-23 02:31:56,845 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1036 transitions. Word has length 113 [2022-11-23 02:31:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:56,845 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1036 transitions. [2022-11-23 02:31:56,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:31:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1036 transitions. [2022-11-23 02:31:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:31:56,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:56,848 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:31:56,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 02:31:56,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash 407852171, now seen corresponding path program 1 times [2022-11-23 02:31:56,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:56,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928178853] [2022-11-23 02:31:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:56,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:56,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:31:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:56,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:31:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:57,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:31:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:57,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:31:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:57,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:31:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:57,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928178853] [2022-11-23 02:31:57,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928178853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:57,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:57,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:31:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047134947] [2022-11-23 02:31:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:57,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:31:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:57,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:31:57,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:31:57,061 INFO L87 Difference]: Start difference. First operand 670 states and 1036 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:31:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:31:59,379 INFO L93 Difference]: Finished difference Result 2151 states and 3382 transitions. [2022-11-23 02:31:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:31:59,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:31:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:31:59,391 INFO L225 Difference]: With dead ends: 2151 [2022-11-23 02:31:59,391 INFO L226 Difference]: Without dead ends: 1496 [2022-11-23 02:31:59,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:31:59,396 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 962 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:31:59,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 1026 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 02:31:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-11-23 02:31:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1091. [2022-11-23 02:31:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 974 states have (on average 1.5503080082135523) internal successors, (1510), 980 states have internal predecessors, (1510), 82 states have call successors, (82), 31 states have call predecessors, (82), 34 states have return successors, (93), 83 states have call predecessors, (93), 80 states have call successors, (93) [2022-11-23 02:31:59,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1685 transitions. [2022-11-23 02:31:59,565 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1685 transitions. Word has length 113 [2022-11-23 02:31:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:31:59,566 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1685 transitions. [2022-11-23 02:31:59,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:31:59,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1685 transitions. [2022-11-23 02:31:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:31:59,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:31:59,568 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:31:59,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 02:31:59,569 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:31:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:31:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1211122743, now seen corresponding path program 1 times [2022-11-23 02:31:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:31:59,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721629792] [2022-11-23 02:31:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:31:59,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:31:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:59,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:31:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:59,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:31:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:59,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:31:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:59,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:31:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:59,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:31:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:31:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:31:59,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:31:59,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721629792] [2022-11-23 02:31:59,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721629792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:31:59,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:31:59,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:31:59,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644567898] [2022-11-23 02:31:59,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:31:59,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:31:59,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:31:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:31:59,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:31:59,746 INFO L87 Difference]: Start difference. First operand 1091 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:32:02,298 INFO L93 Difference]: Finished difference Result 3664 states and 5743 transitions. [2022-11-23 02:32:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:32:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:32:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:32:02,311 INFO L225 Difference]: With dead ends: 3664 [2022-11-23 02:32:02,311 INFO L226 Difference]: Without dead ends: 2588 [2022-11-23 02:32:02,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:32:02,315 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 894 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:32:02,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1547 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 02:32:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-11-23 02:32:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1934. [2022-11-23 02:32:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1729 states have (on average 1.545401966454598) internal successors, (2672), 1739 states have internal predecessors, (2672), 142 states have call successors, (142), 55 states have call predecessors, (142), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2022-11-23 02:32:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2989 transitions. [2022-11-23 02:32:02,570 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2989 transitions. Word has length 113 [2022-11-23 02:32:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:32:02,570 INFO L495 AbstractCegarLoop]: Abstraction has 1934 states and 2989 transitions. [2022-11-23 02:32:02,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2989 transitions. [2022-11-23 02:32:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:32:02,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:32:02,573 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:32:02,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 02:32:02,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:32:02,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:32:02,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2094631733, now seen corresponding path program 1 times [2022-11-23 02:32:02,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:32:02,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287073330] [2022-11-23 02:32:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:32:02,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:32:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:32:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:02,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:32:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:02,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:32:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:02,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:32:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:02,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:32:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:32:02,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:32:02,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287073330] [2022-11-23 02:32:02,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287073330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:32:02,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:32:02,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:32:02,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393473629] [2022-11-23 02:32:02,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:32:02,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:32:02,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:32:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:32:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:32:02,740 INFO L87 Difference]: Start difference. First operand 1934 states and 2989 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:32:05,539 INFO L93 Difference]: Finished difference Result 6682 states and 10469 transitions. [2022-11-23 02:32:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:32:05,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:32:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:32:05,561 INFO L225 Difference]: With dead ends: 6682 [2022-11-23 02:32:05,562 INFO L226 Difference]: Without dead ends: 4763 [2022-11-23 02:32:05,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:32:05,570 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 890 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:32:05,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 1547 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1981 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 02:32:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2022-11-23 02:32:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 3634. [2022-11-23 02:32:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3253 states have (on average 1.5431909007070397) internal successors, (5020), 3271 states have internal predecessors, (5020), 262 states have call successors, (262), 103 states have call predecessors, (262), 118 states have return successors, (357), 275 states have call predecessors, (357), 260 states have call successors, (357) [2022-11-23 02:32:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5639 transitions. [2022-11-23 02:32:06,178 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5639 transitions. Word has length 113 [2022-11-23 02:32:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:32:06,178 INFO L495 AbstractCegarLoop]: Abstraction has 3634 states and 5639 transitions. [2022-11-23 02:32:06,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5639 transitions. [2022-11-23 02:32:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:32:06,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:32:06,182 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:32:06,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 02:32:06,183 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:32:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:32:06,184 INFO L85 PathProgramCache]: Analyzing trace with hash 259753549, now seen corresponding path program 1 times [2022-11-23 02:32:06,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:32:06,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603160042] [2022-11-23 02:32:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:32:06,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:32:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:06,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:32:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:06,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:32:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:06,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:32:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:06,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:32:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:06,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:32:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:32:06,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:32:06,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603160042] [2022-11-23 02:32:06,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603160042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:32:06,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:32:06,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:32:06,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131116347] [2022-11-23 02:32:06,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:32:06,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:32:06,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:32:06,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:32:06,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:32:06,382 INFO L87 Difference]: Start difference. First operand 3634 states and 5639 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:32:09,706 INFO L93 Difference]: Finished difference Result 12736 states and 20013 transitions. [2022-11-23 02:32:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:32:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:32:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:32:09,754 INFO L225 Difference]: With dead ends: 12736 [2022-11-23 02:32:09,754 INFO L226 Difference]: Without dead ends: 9117 [2022-11-23 02:32:09,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:32:09,767 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 889 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:32:09,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 1547 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 02:32:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9117 states. [2022-11-23 02:32:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9117 to 7047. [2022-11-23 02:32:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 6314 states have (on average 1.5416534684827368) internal successors, (9734), 6348 states have internal predecessors, (9734), 502 states have call successors, (502), 199 states have call predecessors, (502), 230 states have return successors, (775), 531 states have call predecessors, (775), 500 states have call successors, (775) [2022-11-23 02:32:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11011 transitions. [2022-11-23 02:32:10,856 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11011 transitions. Word has length 113 [2022-11-23 02:32:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:32:10,857 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11011 transitions. [2022-11-23 02:32:10,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11011 transitions. [2022-11-23 02:32:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:32:10,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:32:10,864 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:32:10,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 02:32:10,864 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:32:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:32:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash 2136816779, now seen corresponding path program 1 times [2022-11-23 02:32:10,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:32:10,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649845675] [2022-11-23 02:32:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:32:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:32:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:32:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:10,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:32:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:11,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:32:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:11,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:32:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:11,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:32:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:32:11,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:32:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649845675] [2022-11-23 02:32:11,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649845675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:32:11,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:32:11,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:32:11,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63909622] [2022-11-23 02:32:11,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:32:11,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:32:11,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:32:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:32:11,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:32:11,055 INFO L87 Difference]: Start difference. First operand 7047 states and 11011 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:32:16,218 INFO L93 Difference]: Finished difference Result 27819 states and 43773 transitions. [2022-11-23 02:32:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:32:16,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:32:16,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:32:16,314 INFO L225 Difference]: With dead ends: 27819 [2022-11-23 02:32:16,314 INFO L226 Difference]: Without dead ends: 20787 [2022-11-23 02:32:16,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:32:16,341 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1140 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:32:16,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 1537 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 02:32:16,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20787 states. [2022-11-23 02:32:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20787 to 13808. [2022-11-23 02:32:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 12403 states have (on average 1.54349754091752) internal successors, (19144), 12469 states have internal predecessors, (19144), 950 states have call successors, (950), 391 states have call predecessors, (950), 454 states have return successors, (1741), 1011 states have call predecessors, (1741), 948 states have call successors, (1741) [2022-11-23 02:32:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 21835 transitions. [2022-11-23 02:32:18,561 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 21835 transitions. Word has length 113 [2022-11-23 02:32:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:32:18,561 INFO L495 AbstractCegarLoop]: Abstraction has 13808 states and 21835 transitions. [2022-11-23 02:32:18,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 21835 transitions. [2022-11-23 02:32:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:32:18,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:32:18,573 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:32:18,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 02:32:18,574 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:32:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:32:18,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1366083213, now seen corresponding path program 1 times [2022-11-23 02:32:18,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:32:18,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093255279] [2022-11-23 02:32:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:32:18,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:32:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:18,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:32:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:18,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:32:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:18,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:32:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:18,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:32:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:18,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:32:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:32:18,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:32:18,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093255279] [2022-11-23 02:32:18,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093255279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:32:18,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:32:18,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:32:18,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370803362] [2022-11-23 02:32:18,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:32:18,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:32:18,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:32:18,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:32:18,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:32:18,741 INFO L87 Difference]: Start difference. First operand 13808 states and 21835 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:32:27,149 INFO L93 Difference]: Finished difference Result 53954 states and 85811 transitions. [2022-11-23 02:32:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:32:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:32:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:32:27,308 INFO L225 Difference]: With dead ends: 53954 [2022-11-23 02:32:27,308 INFO L226 Difference]: Without dead ends: 40161 [2022-11-23 02:32:27,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:32:27,361 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 939 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:32:27,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1533 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 02:32:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40161 states. [2022-11-23 02:32:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40161 to 26657. [2022-11-23 02:32:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26657 states, 23940 states have (on average 1.5389306599832915) internal successors, (36842), 24070 states have internal predecessors, (36842), 1814 states have call successors, (1814), 775 states have call predecessors, (1814), 902 states have return successors, (4127), 1939 states have call predecessors, (4127), 1812 states have call successors, (4127) [2022-11-23 02:32:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26657 states to 26657 states and 42783 transitions. [2022-11-23 02:32:31,406 INFO L78 Accepts]: Start accepts. Automaton has 26657 states and 42783 transitions. Word has length 113 [2022-11-23 02:32:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:32:31,408 INFO L495 AbstractCegarLoop]: Abstraction has 26657 states and 42783 transitions. [2022-11-23 02:32:31,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 26657 states and 42783 transitions. [2022-11-23 02:32:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:32:31,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:32:31,434 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:32:31,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 02:32:31,435 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:32:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:32:31,435 INFO L85 PathProgramCache]: Analyzing trace with hash 371389515, now seen corresponding path program 1 times [2022-11-23 02:32:31,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:32:31,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539011902] [2022-11-23 02:32:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:32:31,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:32:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:31,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:32:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:31,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:32:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:31,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:32:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:31,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:32:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:31,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:32:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:32:31,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:32:31,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539011902] [2022-11-23 02:32:31,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539011902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:32:31,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:32:31,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:32:31,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145772729] [2022-11-23 02:32:31,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:32:31,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:32:31,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:32:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:32:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:32:31,633 INFO L87 Difference]: Start difference. First operand 26657 states and 42783 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:32:45,350 INFO L93 Difference]: Finished difference Result 103121 states and 166425 transitions. [2022-11-23 02:32:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:32:45,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-11-23 02:32:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:32:45,886 INFO L225 Difference]: With dead ends: 103121 [2022-11-23 02:32:45,886 INFO L226 Difference]: Without dead ends: 76479 [2022-11-23 02:32:45,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:32:45,980 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1060 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:32:45,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1537 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 02:32:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76479 states. [2022-11-23 02:32:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76479 to 52930. [2022-11-23 02:32:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52930 states, 47653 states have (on average 1.5413929868004113) internal successors, (73452), 47911 states have internal predecessors, (73452), 3478 states have call successors, (3478), 1543 states have call predecessors, (3478), 1798 states have return successors, (10293), 3731 states have call predecessors, (10293), 3476 states have call successors, (10293) [2022-11-23 02:32:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52930 states to 52930 states and 87223 transitions. [2022-11-23 02:32:54,238 INFO L78 Accepts]: Start accepts. Automaton has 52930 states and 87223 transitions. Word has length 113 [2022-11-23 02:32:54,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:32:54,239 INFO L495 AbstractCegarLoop]: Abstraction has 52930 states and 87223 transitions. [2022-11-23 02:32:54,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 02:32:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 52930 states and 87223 transitions. [2022-11-23 02:32:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:32:54,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:32:54,273 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 02:32:54,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 02:32:54,274 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:32:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:32:54,274 INFO L85 PathProgramCache]: Analyzing trace with hash -214886707, now seen corresponding path program 1 times [2022-11-23 02:32:54,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:32:54,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995530044] [2022-11-23 02:32:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:32:54,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:32:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:54,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 02:32:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:54,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-23 02:32:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:54,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-23 02:32:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:54,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-23 02:32:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:54,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-23 02:32:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:32:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:32:54,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:32:54,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995530044] [2022-11-23 02:32:54,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995530044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:32:54,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:32:54,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:32:54,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127527780] [2022-11-23 02:32:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:32:54,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:32:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:32:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:32:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:32:54,761 INFO L87 Difference]: Start difference. First operand 52930 states and 87223 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)