./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU --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 627e95ce3a908cf8985afa07449131ce92a9d6017f92545ce88054687d02ef64 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:07:39,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:07:39,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:07:39,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:07:39,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:07:39,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:07:39,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:07:39,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:07:39,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:07:39,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:07:39,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:07:39,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:07:39,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:07:39,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:07:39,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:07:39,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:07:39,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:07:39,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:07:39,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:07:39,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:07:39,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:07:39,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:07:39,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:07:39,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:07:39,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:07:39,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:07:39,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:07:39,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:07:39,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:07:39,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:07:39,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:07:39,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:07:39,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:07:39,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:07:39,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:07:39,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:07:39,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:07:39,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:07:39,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:07:39,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:07:39,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:07:39,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:07:39,930 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:07:39,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:07:39,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:07:39,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:07:39,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:07:39,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:07:39,942 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:07:39,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:07:39,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:07:39,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:07:39,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:07:39,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:07:39,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:07:39,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:07:39,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:07:39,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:07:39,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:07:39,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:07:39,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:07:39,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:07:39,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:07:39,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:07:39,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:07:39,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:07:39,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:07:39,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:07:39,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:07:39,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:07:39,949 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:07:39,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:07:39,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:07:39,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:07:39,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 627e95ce3a908cf8985afa07449131ce92a9d6017f92545ce88054687d02ef64 [2021-11-02 23:07:40,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:07:40,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:07:40,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:07:40,277 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:07:40,278 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:07:40,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label05.c [2021-11-02 23:07:40,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/data/f2cf408ed/e4b77f2fcb2a48d481d095a2b0d4c037/FLAG4c442a745 [2021-11-02 23:07:41,247 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:07:41,249 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label05.c [2021-11-02 23:07:41,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/data/f2cf408ed/e4b77f2fcb2a48d481d095a2b0d4c037/FLAG4c442a745 [2021-11-02 23:07:41,741 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/data/f2cf408ed/e4b77f2fcb2a48d481d095a2b0d4c037 [2021-11-02 23:07:41,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:07:41,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:07:41,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:07:41,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:07:41,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:07:41,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:07:41" (1/1) ... [2021-11-02 23:07:41,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43403c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:41, skipping insertion in model container [2021-11-02 23:07:41,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:07:41" (1/1) ... [2021-11-02 23:07:41,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:07:41,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:07:42,337 WARN L228 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_14cca778-6e4e-4573-acff-4d981b8ab1b0/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label05.c[6412,6425] [2021-11-02 23:07:42,402 WARN L228 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_14cca778-6e4e-4573-acff-4d981b8ab1b0/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label05.c[13105,13118] [2021-11-02 23:07:43,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:07:43,414 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:07:43,466 WARN L228 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_14cca778-6e4e-4573-acff-4d981b8ab1b0/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label05.c[6412,6425] [2021-11-02 23:07:43,489 WARN L228 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_14cca778-6e4e-4573-acff-4d981b8ab1b0/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label05.c[13105,13118] [2021-11-02 23:07:44,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:07:44,134 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:07:44,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44 WrapperNode [2021-11-02 23:07:44,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:07:44,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:07:44,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:07:44,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:07:44,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:44,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:44,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:07:44,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:07:44,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:07:44,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:07:44,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:44,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:45,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:45,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:45,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:45,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:45,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:45,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:07:45,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:07:45,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:07:45,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:07:45,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (1/1) ... [2021-11-02 23:07:45,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:07:45,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:45,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:07:45,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:07:45,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:07:45,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:07:45,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:07:45,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:07:50,871 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:07:50,871 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-11-02 23:07:50,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:07:50 BoogieIcfgContainer [2021-11-02 23:07:50,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:07:50,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:07:50,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:07:50,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:07:50,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:07:41" (1/3) ... [2021-11-02 23:07:50,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9be774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:07:50, skipping insertion in model container [2021-11-02 23:07:50,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:07:44" (2/3) ... [2021-11-02 23:07:50,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9be774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:07:50, skipping insertion in model container [2021-11-02 23:07:50,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:07:50" (3/3) ... [2021-11-02 23:07:50,885 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label05.c [2021-11-02 23:07:50,896 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:07:50,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 23:07:50,968 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:07:50,977 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:07:50,977 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 23:07:51,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:07:51,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:51,035 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:51,035 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2021-11-02 23:07:51,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:51,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709935795] [2021-11-02 23:07:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:51,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:51,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:51,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709935795] [2021-11-02 23:07:51,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709935795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:51,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:51,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:07:51,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953725229] [2021-11-02 23:07:51,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 23:07:51,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 23:07:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:07:51,302 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:51,394 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2021-11-02 23:07:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:07:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 23:07:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:51,421 INFO L225 Difference]: With dead ends: 1734 [2021-11-02 23:07:51,421 INFO L226 Difference]: Without dead ends: 812 [2021-11-02 23:07:51,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:07:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-02 23:07:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2021-11-02 23:07:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2021-11-02 23:07:51,535 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2021-11-02 23:07:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:51,535 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2021-11-02 23:07:51,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2021-11-02 23:07:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:07:51,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:51,538 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:51,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:07:51,539 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-11-02 23:07:51,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:51,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299806185] [2021-11-02 23:07:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:51,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:51,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:51,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299806185] [2021-11-02 23:07:51,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299806185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:51,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:51,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:07:51,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669535314] [2021-11-02 23:07:51,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:07:51,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:51,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:07:51,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:07:51,716 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:51,843 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2021-11-02 23:07:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:07:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 23:07:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:51,850 INFO L225 Difference]: With dead ends: 888 [2021-11-02 23:07:51,851 INFO L226 Difference]: Without dead ends: 848 [2021-11-02 23:07:51,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:07:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-02 23:07:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2021-11-02 23:07:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2021-11-02 23:07:51,892 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2021-11-02 23:07:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:51,893 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2021-11-02 23:07:51,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2021-11-02 23:07:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:07:51,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:51,901 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:51,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:07:51,902 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-11-02 23:07:51,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:51,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900484056] [2021-11-02 23:07:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:51,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:51,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:51,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900484056] [2021-11-02 23:07:51,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900484056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:51,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:51,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:51,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894031456] [2021-11-02 23:07:51,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:51,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:51,998 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:52,031 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2021-11-02 23:07:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:52,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:07:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:52,037 INFO L225 Difference]: With dead ends: 878 [2021-11-02 23:07:52,038 INFO L226 Difference]: Without dead ends: 842 [2021-11-02 23:07:52,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-11-02 23:07:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2021-11-02 23:07:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.8627684964200477) internal successors, (1561), 839 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2021-11-02 23:07:52,067 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2021-11-02 23:07:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:52,068 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2021-11-02 23:07:52,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2021-11-02 23:07:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:07:52,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:52,070 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:52,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:07:52,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-11-02 23:07:52,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:52,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970523094] [2021-11-02 23:07:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:52,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:52,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:52,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970523094] [2021-11-02 23:07:52,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970523094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:52,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:52,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:07:52,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635599669] [2021-11-02 23:07:52,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:07:52,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:07:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:07:52,160 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:52,297 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2021-11-02 23:07:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:07:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:07:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:52,307 INFO L225 Difference]: With dead ends: 1224 [2021-11-02 23:07:52,307 INFO L226 Difference]: Without dead ends: 1160 [2021-11-02 23:07:52,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:07:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-11-02 23:07:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2021-11-02 23:07:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.84) internal successors, (1656), 901 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2021-11-02 23:07:52,344 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2021-11-02 23:07:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:52,345 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2021-11-02 23:07:52,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2021-11-02 23:07:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:07:52,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:52,347 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:52,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:07:52,348 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-11-02 23:07:52,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:52,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662497134] [2021-11-02 23:07:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:52,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:52,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:52,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662497134] [2021-11-02 23:07:52,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662497134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:52,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:52,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:52,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446237779] [2021-11-02 23:07:52,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:52,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:52,408 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:52,445 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2021-11-02 23:07:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:52,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 23:07:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:52,453 INFO L225 Difference]: With dead ends: 1089 [2021-11-02 23:07:52,453 INFO L226 Difference]: Without dead ends: 963 [2021-11-02 23:07:52,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-02 23:07:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-11-02 23:07:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8185610010427529) internal successors, (1744), 960 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2021-11-02 23:07:52,489 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2021-11-02 23:07:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:52,490 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2021-11-02 23:07:52,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2021-11-02 23:07:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:07:52,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:52,492 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:52,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:07:52,492 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:52,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-11-02 23:07:52,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:52,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210802905] [2021-11-02 23:07:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:52,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:52,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:52,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210802905] [2021-11-02 23:07:52,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210802905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:52,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:52,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:07:52,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841809637] [2021-11-02 23:07:52,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:07:52,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:52,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:07:52,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:07:52,624 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:52,784 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2021-11-02 23:07:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:07:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 23:07:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:52,800 INFO L225 Difference]: With dead ends: 1146 [2021-11-02 23:07:52,800 INFO L226 Difference]: Without dead ends: 963 [2021-11-02 23:07:52,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:07:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-02 23:07:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-11-02 23:07:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8154327424400416) internal successors, (1741), 960 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2021-11-02 23:07:52,834 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2021-11-02 23:07:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:52,834 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2021-11-02 23:07:52,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2021-11-02 23:07:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:07:52,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:52,836 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:52,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:07:52,837 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-11-02 23:07:52,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:52,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489960705] [2021-11-02 23:07:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:52,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:52,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:52,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489960705] [2021-11-02 23:07:52,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489960705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:52,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:52,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:52,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588423015] [2021-11-02 23:07:52,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:52,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:52,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:52,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:52,891 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:52,929 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2021-11-02 23:07:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 23:07:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:52,938 INFO L225 Difference]: With dead ends: 1291 [2021-11-02 23:07:52,938 INFO L226 Difference]: Without dead ends: 1108 [2021-11-02 23:07:52,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-11-02 23:07:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2021-11-02 23:07:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 1.7681159420289856) internal successors, (1952), 1105 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2021-11-02 23:07:52,980 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2021-11-02 23:07:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:52,981 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2021-11-02 23:07:52,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2021-11-02 23:07:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:07:52,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:52,982 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:52,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:07:52,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:52,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-11-02 23:07:52,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:52,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311579389] [2021-11-02 23:07:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:52,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:53,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:53,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311579389] [2021-11-02 23:07:53,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311579389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:53,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:53,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:53,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568012439] [2021-11-02 23:07:53,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:53,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:53,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:53,054 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:53,101 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2021-11-02 23:07:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:53,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 23:07:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:53,111 INFO L225 Difference]: With dead ends: 1690 [2021-11-02 23:07:53,111 INFO L226 Difference]: Without dead ends: 1362 [2021-11-02 23:07:53,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:53,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-11-02 23:07:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2021-11-02 23:07:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1358 states have (on average 1.6995581737849779) internal successors, (2308), 1359 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2021-11-02 23:07:53,170 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2021-11-02 23:07:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:53,171 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2021-11-02 23:07:53,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2021-11-02 23:07:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:07:53,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:53,172 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:53,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:07:53,172 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-11-02 23:07:53,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:53,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551787982] [2021-11-02 23:07:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:53,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:53,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:53,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551787982] [2021-11-02 23:07:53,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551787982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:53,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:53,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:07:53,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237939427] [2021-11-02 23:07:53,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:07:53,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:07:53,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:07:53,274 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:53,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:53,409 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2021-11-02 23:07:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:07:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 23:07:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:53,423 INFO L225 Difference]: With dead ends: 1883 [2021-11-02 23:07:53,423 INFO L226 Difference]: Without dead ends: 1881 [2021-11-02 23:07:53,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:07:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-11-02 23:07:53,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2021-11-02 23:07:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1406 states have (on average 1.6728307254623045) internal successors, (2352), 1407 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2021-11-02 23:07:53,495 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2021-11-02 23:07:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:53,495 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2021-11-02 23:07:53,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2021-11-02 23:07:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:07:53,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:53,497 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:07:53,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:07:53,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:53,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:53,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1100178715, now seen corresponding path program 1 times [2021-11-02 23:07:53,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:53,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455352093] [2021-11-02 23:07:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:53,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:53,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:53,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455352093] [2021-11-02 23:07:53,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455352093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:53,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:53,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:53,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624317741] [2021-11-02 23:07:53,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:07:53,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:53,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:07:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:07:53,630 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:01,464 INFO L93 Difference]: Finished difference Result 3663 states and 6661 transitions. [2021-11-02 23:08:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:08:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 23:08:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:01,482 INFO L225 Difference]: With dead ends: 3663 [2021-11-02 23:08:01,482 INFO L226 Difference]: Without dead ends: 2910 [2021-11-02 23:08:01,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:08:01,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-11-02 23:08:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2910. [2021-11-02 23:08:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2908 states have (on average 1.5357634112792298) internal successors, (4466), 2909 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4466 transitions. [2021-11-02 23:08:01,605 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4466 transitions. Word has length 60 [2021-11-02 23:08:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:01,607 INFO L470 AbstractCegarLoop]: Abstraction has 2910 states and 4466 transitions. [2021-11-02 23:08:01,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4466 transitions. [2021-11-02 23:08:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:08:01,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:01,609 INFO L513 BasicCegarLoop]: trace histogram [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, 1] [2021-11-02 23:08:01,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:08:01,609 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-11-02 23:08:01,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:01,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354418015] [2021-11-02 23:08:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:01,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 23:08:01,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:01,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354418015] [2021-11-02 23:08:01,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354418015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:01,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:01,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:08:01,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837501787] [2021-11-02 23:08:01,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:08:01,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:08:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:08:01,715 INFO L87 Difference]: Start difference. First operand 2910 states and 4466 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:01,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:01,928 INFO L93 Difference]: Finished difference Result 4938 states and 7314 transitions. [2021-11-02 23:08:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:08:01,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:08:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:01,954 INFO L225 Difference]: With dead ends: 4938 [2021-11-02 23:08:01,955 INFO L226 Difference]: Without dead ends: 4308 [2021-11-02 23:08:01,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:08:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2021-11-02 23:08:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 3538. [2021-11-02 23:08:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3536 states have (on average 1.5107466063348416) internal successors, (5342), 3537 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 5342 transitions. [2021-11-02 23:08:02,116 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 5342 transitions. Word has length 64 [2021-11-02 23:08:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:02,117 INFO L470 AbstractCegarLoop]: Abstraction has 3538 states and 5342 transitions. [2021-11-02 23:08:02,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 5342 transitions. [2021-11-02 23:08:02,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:08:02,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:02,119 INFO L513 BasicCegarLoop]: trace histogram [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, 1] [2021-11-02 23:08:02,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:08:02,119 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:02,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-11-02 23:08:02,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:02,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061389438] [2021-11-02 23:08:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:02,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:08:02,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:02,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061389438] [2021-11-02 23:08:02,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061389438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:02,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:02,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:08:02,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482458731] [2021-11-02 23:08:02,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:08:02,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:08:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:08:02,201 INFO L87 Difference]: Start difference. First operand 3538 states and 5342 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:02,436 INFO L93 Difference]: Finished difference Result 5566 states and 8190 transitions. [2021-11-02 23:08:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:08:02,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:08:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:02,464 INFO L225 Difference]: With dead ends: 5566 [2021-11-02 23:08:02,465 INFO L226 Difference]: Without dead ends: 4936 [2021-11-02 23:08:02,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:08:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2021-11-02 23:08:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4482. [2021-11-02 23:08:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 4480 states have (on average 1.4834821428571427) internal successors, (6646), 4481 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6646 transitions. [2021-11-02 23:08:02,791 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6646 transitions. Word has length 64 [2021-11-02 23:08:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:02,791 INFO L470 AbstractCegarLoop]: Abstraction has 4482 states and 6646 transitions. [2021-11-02 23:08:02,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6646 transitions. [2021-11-02 23:08:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:08:02,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:02,793 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:08:02,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:08:02,794 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:02,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-11-02 23:08:02,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:02,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484468331] [2021-11-02 23:08:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:02,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:02,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:02,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484468331] [2021-11-02 23:08:02,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484468331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:02,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:02,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:08:02,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761500145] [2021-11-02 23:08:02,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:08:02,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:08:02,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:08:02,868 INFO L87 Difference]: Start difference. First operand 4482 states and 6646 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:03,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:03,133 INFO L93 Difference]: Finished difference Result 5834 states and 8570 transitions. [2021-11-02 23:08:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:08:03,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:08:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:03,165 INFO L225 Difference]: With dead ends: 5834 [2021-11-02 23:08:03,172 INFO L226 Difference]: Without dead ends: 5384 [2021-11-02 23:08:03,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:08:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2021-11-02 23:08:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4930. [2021-11-02 23:08:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4768668831168832) internal successors, (7278), 4929 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7278 transitions. [2021-11-02 23:08:03,448 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7278 transitions. Word has length 64 [2021-11-02 23:08:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:03,449 INFO L470 AbstractCegarLoop]: Abstraction has 4930 states and 7278 transitions. [2021-11-02 23:08:03,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7278 transitions. [2021-11-02 23:08:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 23:08:03,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:03,458 INFO L513 BasicCegarLoop]: 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] [2021-11-02 23:08:03,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:08:03,458 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:03,459 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-11-02 23:08:03,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:03,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754801954] [2021-11-02 23:08:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:03,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:03,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:03,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754801954] [2021-11-02 23:08:03,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754801954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:03,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:03,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:08:03,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090832775] [2021-11-02 23:08:03,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:08:03,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:03,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:08:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:03,526 INFO L87 Difference]: Start difference. First operand 4930 states and 7278 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:03,723 INFO L93 Difference]: Finished difference Result 7582 states and 10980 transitions. [2021-11-02 23:08:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:08:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 23:08:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:03,734 INFO L225 Difference]: With dead ends: 7582 [2021-11-02 23:08:03,735 INFO L226 Difference]: Without dead ends: 4932 [2021-11-02 23:08:03,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2021-11-02 23:08:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4930. [2021-11-02 23:08:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4667207792207793) internal successors, (7228), 4929 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7228 transitions. [2021-11-02 23:08:03,976 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7228 transitions. Word has length 65 [2021-11-02 23:08:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:03,977 INFO L470 AbstractCegarLoop]: Abstraction has 4930 states and 7228 transitions. [2021-11-02 23:08:03,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7228 transitions. [2021-11-02 23:08:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 23:08:03,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:03,979 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 23:08:03,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:08:03,979 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-11-02 23:08:03,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:03,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599149936] [2021-11-02 23:08:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:03,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:04,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:04,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599149936] [2021-11-02 23:08:04,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599149936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:04,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:04,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:08:04,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217855947] [2021-11-02 23:08:04,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:08:04,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:08:04,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:04,029 INFO L87 Difference]: Start difference. First operand 4930 states and 7228 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:04,193 INFO L93 Difference]: Finished difference Result 6258 states and 9055 transitions. [2021-11-02 23:08:04,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:08:04,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 23:08:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:04,202 INFO L225 Difference]: With dead ends: 6258 [2021-11-02 23:08:04,202 INFO L226 Difference]: Without dead ends: 3608 [2021-11-02 23:08:04,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2021-11-02 23:08:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3606. [2021-11-02 23:08:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3604 states have (on average 1.4922308546059933) internal successors, (5378), 3605 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5378 transitions. [2021-11-02 23:08:04,337 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5378 transitions. Word has length 65 [2021-11-02 23:08:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:04,337 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 5378 transitions. [2021-11-02 23:08:04,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5378 transitions. [2021-11-02 23:08:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 23:08:04,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:04,339 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:04,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 23:08:04,339 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-11-02 23:08:04,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:04,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771921321] [2021-11-02 23:08:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:04,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:04,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:04,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771921321] [2021-11-02 23:08:04,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771921321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:04,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186946920] [2021-11-02 23:08:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:04,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:04,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:04,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:04,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:08:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:08:04,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:05,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186946920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:05,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:05,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2021-11-02 23:08:05,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244586470] [2021-11-02 23:08:05,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:08:05,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:05,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:08:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:05,059 INFO L87 Difference]: Start difference. First operand 3606 states and 5378 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:05,381 INFO L93 Difference]: Finished difference Result 5620 states and 8128 transitions. [2021-11-02 23:08:05,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:08:05,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 23:08:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:05,392 INFO L225 Difference]: With dead ends: 5620 [2021-11-02 23:08:05,392 INFO L226 Difference]: Without dead ends: 4610 [2021-11-02 23:08:05,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:08:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-11-02 23:08:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4412. [2021-11-02 23:08:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4410 states have (on average 1.4589569160997733) internal successors, (6434), 4411 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 6434 transitions. [2021-11-02 23:08:05,617 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 6434 transitions. Word has length 65 [2021-11-02 23:08:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:05,618 INFO L470 AbstractCegarLoop]: Abstraction has 4412 states and 6434 transitions. [2021-11-02 23:08:05,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 6434 transitions. [2021-11-02 23:08:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:08:05,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:05,620 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-11-02 23:08:05,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:05,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:08:05,840 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2021-11-02 23:08:05,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:05,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401662806] [2021-11-02 23:08:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:05,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:06,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:06,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401662806] [2021-11-02 23:08:06,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401662806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:06,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137489693] [2021-11-02 23:08:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:06,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:06,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:06,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:06,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:08:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:06,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:08:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:07,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137489693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:07,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:07,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-02 23:08:07,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099063696] [2021-11-02 23:08:07,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:08:07,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:08:07,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:08:07,707 INFO L87 Difference]: Start difference. First operand 4412 states and 6434 transitions. Second operand has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:14,628 INFO L93 Difference]: Finished difference Result 29016 states and 38936 transitions. [2021-11-02 23:08:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-02 23:08:14,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:08:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:14,695 INFO L225 Difference]: With dead ends: 29016 [2021-11-02 23:08:14,695 INFO L226 Difference]: Without dead ends: 26884 [2021-11-02 23:08:14,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1545, Invalid=8355, Unknown=0, NotChecked=0, Total=9900 [2021-11-02 23:08:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26884 states. [2021-11-02 23:08:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26884 to 12386. [2021-11-02 23:08:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12386 states, 12384 states have (on average 1.3597383720930232) internal successors, (16839), 12385 states have internal predecessors, (16839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12386 states to 12386 states and 16839 transitions. [2021-11-02 23:08:15,713 INFO L78 Accepts]: Start accepts. Automaton has 12386 states and 16839 transitions. Word has length 66 [2021-11-02 23:08:15,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:15,714 INFO L470 AbstractCegarLoop]: Abstraction has 12386 states and 16839 transitions. [2021-11-02 23:08:15,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 12386 states and 16839 transitions. [2021-11-02 23:08:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:08:15,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:15,717 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:15,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:15,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:08:15,932 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:15,933 INFO L85 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2021-11-02 23:08:15,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:15,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514527411] [2021-11-02 23:08:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:15,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:16,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:16,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514527411] [2021-11-02 23:08:16,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514527411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:16,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46371067] [2021-11-02 23:08:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:16,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:16,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:16,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:08:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:08:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:17,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46371067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:17,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:17,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-02 23:08:17,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940192693] [2021-11-02 23:08:17,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:08:17,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:08:17,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:08:17,350 INFO L87 Difference]: Start difference. First operand 12386 states and 16839 transitions. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:21,320 INFO L93 Difference]: Finished difference Result 55180 states and 72175 transitions. [2021-11-02 23:08:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:08:21,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:08:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:21,429 INFO L225 Difference]: With dead ends: 55180 [2021-11-02 23:08:21,429 INFO L226 Difference]: Without dead ends: 45074 [2021-11-02 23:08:21,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=987, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:08:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45074 states. [2021-11-02 23:08:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45074 to 29822. [2021-11-02 23:08:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29822 states, 29820 states have (on average 1.3168008048289739) internal successors, (39267), 29821 states have internal predecessors, (39267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29822 states to 29822 states and 39267 transitions. [2021-11-02 23:08:24,153 INFO L78 Accepts]: Start accepts. Automaton has 29822 states and 39267 transitions. Word has length 66 [2021-11-02 23:08:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:24,153 INFO L470 AbstractCegarLoop]: Abstraction has 29822 states and 39267 transitions. [2021-11-02 23:08:24,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 29822 states and 39267 transitions. [2021-11-02 23:08:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:08:24,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:24,157 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-11-02 23:08:24,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:24,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:08:24,372 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2021-11-02 23:08:24,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:24,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075411085] [2021-11-02 23:08:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:24,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:24,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:24,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075411085] [2021-11-02 23:08:24,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075411085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:24,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:24,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:08:24,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751386185] [2021-11-02 23:08:24,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:08:24,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:08:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:24,579 INFO L87 Difference]: Start difference. First operand 29822 states and 39267 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:25,699 INFO L93 Difference]: Finished difference Result 41818 states and 54797 transitions. [2021-11-02 23:08:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:08:25,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:08:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:25,746 INFO L225 Difference]: With dead ends: 41818 [2021-11-02 23:08:25,747 INFO L226 Difference]: Without dead ends: 14276 [2021-11-02 23:08:25,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14276 states. [2021-11-02 23:08:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14276 to 13224. [2021-11-02 23:08:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13224 states, 13222 states have (on average 1.3277870216306156) internal successors, (17556), 13223 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13224 states to 13224 states and 17556 transitions. [2021-11-02 23:08:26,888 INFO L78 Accepts]: Start accepts. Automaton has 13224 states and 17556 transitions. Word has length 66 [2021-11-02 23:08:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:26,889 INFO L470 AbstractCegarLoop]: Abstraction has 13224 states and 17556 transitions. [2021-11-02 23:08:26,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand 13224 states and 17556 transitions. [2021-11-02 23:08:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:08:26,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:26,892 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:26,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 23:08:26,892 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:26,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2021-11-02 23:08:26,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:26,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303899020] [2021-11-02 23:08:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:26,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:08:26,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:26,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303899020] [2021-11-02 23:08:26,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303899020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:26,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:26,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:08:26,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317580251] [2021-11-02 23:08:26,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:08:26,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:08:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:08:26,962 INFO L87 Difference]: Start difference. First operand 13224 states and 17556 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:28,072 INFO L93 Difference]: Finished difference Result 22289 states and 29203 transitions. [2021-11-02 23:08:28,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:08:28,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:08:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:28,094 INFO L225 Difference]: With dead ends: 22289 [2021-11-02 23:08:28,095 INFO L226 Difference]: Without dead ends: 11422 [2021-11-02 23:08:28,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:28,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11422 states. [2021-11-02 23:08:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11422 to 11422. [2021-11-02 23:08:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11422 states, 11420 states have (on average 1.31646234676007) internal successors, (15034), 11421 states have internal predecessors, (15034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11422 states to 11422 states and 15034 transitions. [2021-11-02 23:08:29,078 INFO L78 Accepts]: Start accepts. Automaton has 11422 states and 15034 transitions. Word has length 66 [2021-11-02 23:08:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:29,078 INFO L470 AbstractCegarLoop]: Abstraction has 11422 states and 15034 transitions. [2021-11-02 23:08:29,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 11422 states and 15034 transitions. [2021-11-02 23:08:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:08:29,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:29,081 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:29,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 23:08:29,081 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:29,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2021-11-02 23:08:29,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:29,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587533934] [2021-11-02 23:08:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:29,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:08:29,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:29,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587533934] [2021-11-02 23:08:29,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587533934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:29,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:29,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:08:29,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124701456] [2021-11-02 23:08:29,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:08:29,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:08:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:08:29,153 INFO L87 Difference]: Start difference. First operand 11422 states and 15034 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:30,025 INFO L93 Difference]: Finished difference Result 18199 states and 23570 transitions. [2021-11-02 23:08:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:08:30,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:08:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:30,040 INFO L225 Difference]: With dead ends: 18199 [2021-11-02 23:08:30,040 INFO L226 Difference]: Without dead ends: 9170 [2021-11-02 23:08:30,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2021-11-02 23:08:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 9170. [2021-11-02 23:08:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9170 states, 9168 states have (on average 1.3160994764397906) internal successors, (12066), 9169 states have internal predecessors, (12066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9170 states to 9170 states and 12066 transitions. [2021-11-02 23:08:30,903 INFO L78 Accepts]: Start accepts. Automaton has 9170 states and 12066 transitions. Word has length 66 [2021-11-02 23:08:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:30,904 INFO L470 AbstractCegarLoop]: Abstraction has 9170 states and 12066 transitions. [2021-11-02 23:08:30,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 9170 states and 12066 transitions. [2021-11-02 23:08:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:08:30,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:30,905 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:30,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 23:08:30,906 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-11-02 23:08:30,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:30,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313036300] [2021-11-02 23:08:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:30,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:08:30,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:30,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313036300] [2021-11-02 23:08:30,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313036300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:30,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:30,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:08:30,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051075829] [2021-11-02 23:08:30,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:08:30,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:08:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:08:30,965 INFO L87 Difference]: Start difference. First operand 9170 states and 12066 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:31,702 INFO L93 Difference]: Finished difference Result 14520 states and 18723 transitions. [2021-11-02 23:08:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:08:31,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:08:31,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:31,714 INFO L225 Difference]: With dead ends: 14520 [2021-11-02 23:08:31,714 INFO L226 Difference]: Without dead ends: 7666 [2021-11-02 23:08:31,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7666 states. [2021-11-02 23:08:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7666 to 7666. [2021-11-02 23:08:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 7664 states have (on average 1.325678496868476) internal successors, (10160), 7665 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 10160 transitions. [2021-11-02 23:08:32,275 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 10160 transitions. Word has length 66 [2021-11-02 23:08:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:32,276 INFO L470 AbstractCegarLoop]: Abstraction has 7666 states and 10160 transitions. [2021-11-02 23:08:32,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 10160 transitions. [2021-11-02 23:08:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:08:32,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:32,278 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:32,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 23:08:32,278 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2021-11-02 23:08:32,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:32,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145210907] [2021-11-02 23:08:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:32,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:32,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:32,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145210907] [2021-11-02 23:08:32,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145210907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:32,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259239057] [2021-11-02 23:08:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:32,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:32,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:32,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:32,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:08:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:33,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:08:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:34,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259239057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:34,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:34,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-11-02 23:08:34,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171285057] [2021-11-02 23:08:34,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:08:34,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:08:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:08:34,762 INFO L87 Difference]: Start difference. First operand 7666 states and 10160 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:37,098 INFO L93 Difference]: Finished difference Result 11323 states and 14631 transitions. [2021-11-02 23:08:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:08:37,099 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 23:08:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:37,109 INFO L225 Difference]: With dead ends: 11323 [2021-11-02 23:08:37,110 INFO L226 Difference]: Without dead ends: 9072 [2021-11-02 23:08:37,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=341, Invalid=1219, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:08:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9072 states. [2021-11-02 23:08:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9072 to 6944. [2021-11-02 23:08:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6944 states, 6942 states have (on average 1.3377989052146355) internal successors, (9287), 6943 states have internal predecessors, (9287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6944 states to 6944 states and 9287 transitions. [2021-11-02 23:08:37,664 INFO L78 Accepts]: Start accepts. Automaton has 6944 states and 9287 transitions. Word has length 67 [2021-11-02 23:08:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:37,664 INFO L470 AbstractCegarLoop]: Abstraction has 6944 states and 9287 transitions. [2021-11-02 23:08:37,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6944 states and 9287 transitions. [2021-11-02 23:08:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:08:37,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:37,667 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:37,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:37,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:37,876 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2021-11-02 23:08:37,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:37,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490088327] [2021-11-02 23:08:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:37,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:38,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:38,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490088327] [2021-11-02 23:08:38,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490088327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:38,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366373832] [2021-11-02 23:08:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:38,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:38,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:38,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:38,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:08:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:38,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:08:38,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:40,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366373832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:40,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:40,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-02 23:08:40,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090650083] [2021-11-02 23:08:40,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:08:40,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:40,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:08:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:08:40,285 INFO L87 Difference]: Start difference. First operand 6944 states and 9287 transitions. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:42,762 INFO L93 Difference]: Finished difference Result 11680 states and 15331 transitions. [2021-11-02 23:08:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:08:42,762 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 23:08:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:42,772 INFO L225 Difference]: With dead ends: 11680 [2021-11-02 23:08:42,772 INFO L226 Difference]: Without dead ends: 9426 [2021-11-02 23:08:42,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=421, Invalid=1471, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:08:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9426 states. [2021-11-02 23:08:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9426 to 5916. [2021-11-02 23:08:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5916 states, 5914 states have (on average 1.361007778153534) internal successors, (8049), 5915 states have internal predecessors, (8049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5916 states to 5916 states and 8049 transitions. [2021-11-02 23:08:43,288 INFO L78 Accepts]: Start accepts. Automaton has 5916 states and 8049 transitions. Word has length 67 [2021-11-02 23:08:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:43,288 INFO L470 AbstractCegarLoop]: Abstraction has 5916 states and 8049 transitions. [2021-11-02 23:08:43,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5916 states and 8049 transitions. [2021-11-02 23:08:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:08:43,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:43,290 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:43,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:43,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:43,508 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:43,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2021-11-02 23:08:43,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:43,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723560499] [2021-11-02 23:08:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:43,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:44,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:44,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723560499] [2021-11-02 23:08:44,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723560499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:44,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503299871] [2021-11-02 23:08:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:44,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:44,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:44,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:44,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:08:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:08:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:50,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503299871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:50,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:50,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-11-02 23:08:50,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136965029] [2021-11-02 23:08:50,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 23:08:50,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 23:08:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:08:50,433 INFO L87 Difference]: Start difference. First operand 5916 states and 8049 transitions. Second operand has 44 states, 44 states have (on average 2.840909090909091) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:54,824 INFO L93 Difference]: Finished difference Result 9724 states and 12900 transitions. [2021-11-02 23:08:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:08:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.840909090909091) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 23:08:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:54,835 INFO L225 Difference]: With dead ends: 9724 [2021-11-02 23:08:54,835 INFO L226 Difference]: Without dead ends: 8896 [2021-11-02 23:08:54,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=736, Invalid=3956, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:08:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2021-11-02 23:08:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 5867. [2021-11-02 23:08:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5867 states, 5865 states have (on average 1.3633418584825234) internal successors, (7996), 5866 states have internal predecessors, (7996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 7996 transitions. [2021-11-02 23:08:55,279 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 7996 transitions. Word has length 68 [2021-11-02 23:08:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:55,279 INFO L470 AbstractCegarLoop]: Abstraction has 5867 states and 7996 transitions. [2021-11-02 23:08:55,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.840909090909091) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 7996 transitions. [2021-11-02 23:08:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 23:08:55,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:55,280 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:55,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:55,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:08:55,508 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:55,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1643110011, now seen corresponding path program 1 times [2021-11-02 23:08:55,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:55,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466825127] [2021-11-02 23:08:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:55,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:55,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:55,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466825127] [2021-11-02 23:08:55,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466825127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:55,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336424112] [2021-11-02 23:08:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:55,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:55,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:55,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:55,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:08:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:08:56,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:57,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336424112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:57,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:57,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-02 23:08:57,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037506606] [2021-11-02 23:08:57,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:08:57,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:08:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:08:57,960 INFO L87 Difference]: Start difference. First operand 5867 states and 7996 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:59,325 INFO L93 Difference]: Finished difference Result 7495 states and 10072 transitions. [2021-11-02 23:08:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:08:59,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 23:08:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:59,334 INFO L225 Difference]: With dead ends: 7495 [2021-11-02 23:08:59,334 INFO L226 Difference]: Without dead ends: 5602 [2021-11-02 23:08:59,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:08:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2021-11-02 23:08:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 4944. [2021-11-02 23:08:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4942 states have (on average 1.3885066774585189) internal successors, (6862), 4943 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 6862 transitions. [2021-11-02 23:08:59,700 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 6862 transitions. Word has length 69 [2021-11-02 23:08:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:59,700 INFO L470 AbstractCegarLoop]: Abstraction has 4944 states and 6862 transitions. [2021-11-02 23:08:59,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 6862 transitions. [2021-11-02 23:08:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-02 23:08:59,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:59,702 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-11-02 23:08:59,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:59,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:08:59,903 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash 212235404, now seen corresponding path program 1 times [2021-11-02 23:08:59,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:59,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79534359] [2021-11-02 23:08:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:59,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:00,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:00,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79534359] [2021-11-02 23:09:00,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79534359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:00,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199217879] [2021-11-02 23:09:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:00,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:00,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:00,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:09:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:09:00,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 24 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:03,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199217879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:03,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:03,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-02 23:09:03,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610867688] [2021-11-02 23:09:03,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:09:03,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:03,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:09:03,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:09:03,231 INFO L87 Difference]: Start difference. First operand 4944 states and 6862 transitions. Second operand has 21 states, 21 states have (on average 10.0) internal successors, (210), 20 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:15,674 INFO L93 Difference]: Finished difference Result 7422 states and 9945 transitions. [2021-11-02 23:09:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:09:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 10.0) internal successors, (210), 20 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-02 23:09:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:15,680 INFO L225 Difference]: With dead ends: 7422 [2021-11-02 23:09:15,681 INFO L226 Difference]: Without dead ends: 5284 [2021-11-02 23:09:15,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=805, Invalid=2735, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:09:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-11-02 23:09:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4944. [2021-11-02 23:09:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4942 states have (on average 1.377984621610684) internal successors, (6810), 4943 states have internal predecessors, (6810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 6810 transitions. [2021-11-02 23:09:16,168 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 6810 transitions. Word has length 112 [2021-11-02 23:09:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:16,169 INFO L470 AbstractCegarLoop]: Abstraction has 4944 states and 6810 transitions. [2021-11-02 23:09:16,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.0) internal successors, (210), 20 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 6810 transitions. [2021-11-02 23:09:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 23:09:16,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:16,171 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1] [2021-11-02 23:09:16,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:16,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 23:09:16,372 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:16,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1117709487, now seen corresponding path program 1 times [2021-11-02 23:09:16,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:16,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701697833] [2021-11-02 23:09:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:16,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:16,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:16,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701697833] [2021-11-02 23:09:16,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701697833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:16,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573213393] [2021-11-02 23:09:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:16,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:16,942 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:16,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:09:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:09:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 26 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:19,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573213393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:19,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:19,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-11-02 23:09:19,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042527379] [2021-11-02 23:09:19,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:09:19,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:09:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:09:19,899 INFO L87 Difference]: Start difference. First operand 4944 states and 6810 transitions. Second operand has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:26,230 INFO L93 Difference]: Finished difference Result 9256 states and 12093 transitions. [2021-11-02 23:09:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-02 23:09:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-02 23:09:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:26,242 INFO L225 Difference]: With dead ends: 9256 [2021-11-02 23:09:26,243 INFO L226 Difference]: Without dead ends: 8358 [2021-11-02 23:09:26,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=747, Invalid=7263, Unknown=0, NotChecked=0, Total=8010 [2021-11-02 23:09:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-11-02 23:09:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 5975. [2021-11-02 23:09:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 5973 states have (on average 1.345722417545622) internal successors, (8038), 5974 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 8038 transitions. [2021-11-02 23:09:27,033 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 8038 transitions. Word has length 113 [2021-11-02 23:09:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:27,033 INFO L470 AbstractCegarLoop]: Abstraction has 5975 states and 8038 transitions. [2021-11-02 23:09:27,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 8038 transitions. [2021-11-02 23:09:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 23:09:27,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:27,037 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-02 23:09:27,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:27,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:09:27,250 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:27,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1433585956, now seen corresponding path program 1 times [2021-11-02 23:09:27,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:27,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748227784] [2021-11-02 23:09:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:27,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:27,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:27,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748227784] [2021-11-02 23:09:27,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748227784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:27,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829580868] [2021-11-02 23:09:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:27,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:27,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:27,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:09:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:29,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:09:29,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 14 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:09:29,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829580868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:29,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:29,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 25 [2021-11-02 23:09:29,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114417654] [2021-11-02 23:09:29,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:09:29,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:29,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:09:29,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:09:29,691 INFO L87 Difference]: Start difference. First operand 5975 states and 8038 transitions. Second operand has 25 states, 25 states have (on average 8.32) internal successors, (208), 25 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:45,000 INFO L93 Difference]: Finished difference Result 13534 states and 17135 transitions. [2021-11-02 23:09:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-11-02 23:09:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.32) internal successors, (208), 25 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-02 23:09:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:45,011 INFO L225 Difference]: With dead ends: 13534 [2021-11-02 23:09:45,011 INFO L226 Difference]: Without dead ends: 10053 [2021-11-02 23:09:45,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15573 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=4451, Invalid=33379, Unknown=0, NotChecked=0, Total=37830 [2021-11-02 23:09:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10053 states. [2021-11-02 23:09:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10053 to 8152. [2021-11-02 23:09:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8150 states have (on average 1.2995092024539878) internal successors, (10591), 8151 states have internal predecessors, (10591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 10591 transitions. [2021-11-02 23:09:46,246 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 10591 transitions. Word has length 113 [2021-11-02 23:09:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:46,246 INFO L470 AbstractCegarLoop]: Abstraction has 8152 states and 10591 transitions. [2021-11-02 23:09:46,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.32) internal successors, (208), 25 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 10591 transitions. [2021-11-02 23:09:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 23:09:46,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:46,250 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1] [2021-11-02 23:09:46,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:46,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:09:46,476 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:46,477 INFO L85 PathProgramCache]: Analyzing trace with hash 588226190, now seen corresponding path program 1 times [2021-11-02 23:09:46,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:46,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710150549] [2021-11-02 23:09:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:46,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:47,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:47,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710150549] [2021-11-02 23:09:47,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710150549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:47,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247468413] [2021-11-02 23:09:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:47,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:47,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:47,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:47,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:09:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:48,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:09:48,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:50,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247468413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:50,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:50,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2021-11-02 23:09:50,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294220298] [2021-11-02 23:09:50,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:09:50,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:09:50,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:09:50,574 INFO L87 Difference]: Start difference. First operand 8152 states and 10591 transitions. Second operand has 38 states, 38 states have (on average 5.578947368421052) internal successors, (212), 38 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:03,886 INFO L93 Difference]: Finished difference Result 19901 states and 24815 transitions. [2021-11-02 23:10:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-11-02 23:10:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.578947368421052) internal successors, (212), 38 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-02 23:10:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:03,903 INFO L225 Difference]: With dead ends: 19901 [2021-11-02 23:10:03,903 INFO L226 Difference]: Without dead ends: 17810 [2021-11-02 23:10:03,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8958 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2797, Invalid=25933, Unknown=0, NotChecked=0, Total=28730 [2021-11-02 23:10:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17810 states. [2021-11-02 23:10:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17810 to 11881. [2021-11-02 23:10:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11881 states, 11879 states have (on average 1.2701405842242612) internal successors, (15088), 11880 states have internal predecessors, (15088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11881 states to 11881 states and 15088 transitions. [2021-11-02 23:10:05,955 INFO L78 Accepts]: Start accepts. Automaton has 11881 states and 15088 transitions. Word has length 113 [2021-11-02 23:10:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:05,955 INFO L470 AbstractCegarLoop]: Abstraction has 11881 states and 15088 transitions. [2021-11-02 23:10:05,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.578947368421052) internal successors, (212), 38 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11881 states and 15088 transitions. [2021-11-02 23:10:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 23:10:05,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:05,958 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1] [2021-11-02 23:10:05,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:06,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:06,168 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash -959943598, now seen corresponding path program 1 times [2021-11-02 23:10:06,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:06,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547021772] [2021-11-02 23:10:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:06,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:07,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:07,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547021772] [2021-11-02 23:10:07,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547021772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:07,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503272460] [2021-11-02 23:10:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:07,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:07,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:07,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:07,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cca778-6e4e-4573-acff-4d981b8ab1b0/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:10:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:08,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:10:08,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 76 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:13,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503272460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:13,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:13,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 43 [2021-11-02 23:11:13,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317883367] [2021-11-02 23:11:13,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 23:11:13,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 23:11:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1670, Unknown=30, NotChecked=0, Total=1806 [2021-11-02 23:11:13,067 INFO L87 Difference]: Start difference. First operand 11881 states and 15088 transitions. Second operand has 43 states, 43 states have (on average 5.023255813953488) internal successors, (216), 43 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)