./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash edb6f856db72a43ad08c83ff0e1ee56d288f58300ccdf5a7b1b400a926b63cbe --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:07:02,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:07:02,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:07:02,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:07:02,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:07:02,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:07:02,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:07:02,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:07:02,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:07:02,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:07:02,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:07:02,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:07:02,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:07:02,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:07:02,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:07:02,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:07:02,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:07:02,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:07:02,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:07:02,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:07:02,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:07:02,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:07:02,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:07:02,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:07:02,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:07:02,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:07:02,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:07:02,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:07:02,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:07:02,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:07:02,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:07:02,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:07:02,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:07:02,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:07:02,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:07:02,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:07:02,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:07:02,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:07:02,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:07:02,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:07:02,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:07:02,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:07:02,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:07:02,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:07:02,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:07:02,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:07:02,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:07:02,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:07:02,937 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:07:02,937 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:07:02,938 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:07:02,938 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:07:02,938 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:07:02,938 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:07:02,939 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:07:02,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:07:02,939 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:07:02,939 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:07:02,940 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:07:02,940 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:07:02,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:07:02,941 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:07:02,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:07:02,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:07:02,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:07:02,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:07:02,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:07:02,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:07:02,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:07:02,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:07:02,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:07:02,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:07:02,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:07:02,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:07:02,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:07:02,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:07:02,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:07:02,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:07:02,945 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:07:02,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:07:02,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:07:02,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:07:02,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:07:02,946 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edb6f856db72a43ad08c83ff0e1ee56d288f58300ccdf5a7b1b400a926b63cbe [2021-11-23 17:07:03,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:07:03,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:07:03,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:07:03,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:07:03,232 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:07:03,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem11_label54.c [2021-11-23 17:07:03,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data/96c29c02d/11a045abbdb84e41b5d0f6c0c65fc76a/FLAGfcdd0edc1 [2021-11-23 17:07:03,978 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:07:03,979 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/sv-benchmarks/c/eca-rers2012/Problem11_label54.c [2021-11-23 17:07:03,999 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data/96c29c02d/11a045abbdb84e41b5d0f6c0c65fc76a/FLAGfcdd0edc1 [2021-11-23 17:07:04,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data/96c29c02d/11a045abbdb84e41b5d0f6c0c65fc76a [2021-11-23 17:07:04,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:07:04,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:07:04,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:07:04,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:07:04,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:07:04,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:07:04" (1/1) ... [2021-11-23 17:07:04,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0d8fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:04, skipping insertion in model container [2021-11-23 17:07:04,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:07:04" (1/1) ... [2021-11-23 17:07:04,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:07:04,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:07:04,487 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/sv-benchmarks/c/eca-rers2012/Problem11_label54.c[5423,5436] [2021-11-23 17:07:04,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:07:04,828 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:07:04,853 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/sv-benchmarks/c/eca-rers2012/Problem11_label54.c[5423,5436] [2021-11-23 17:07:05,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:07:05,032 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:07:05,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05 WrapperNode [2021-11-23 17:07:05,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:07:05,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:07:05,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:07:05,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:07:05,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,196 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-11-23 17:07:05,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:07:05,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:07:05,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:07:05,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:07:05,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:07:05,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:07:05,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:07:05,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:07:05,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:05" (1/1) ... [2021-11-23 17:07:05,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:07:05,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:07:05,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:07:05,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:07:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:07:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:07:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:07:05,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:07:05,510 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:07:05,511 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:07:07,277 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:07:07,319 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:07:07,325 INFO L158 Benchmark]: Toolchain (without parser) took 3167.87ms. Allocated memory was 115.3MB in the beginning and 192.9MB in the end (delta: 77.6MB). Free memory was 81.8MB in the beginning and 116.0MB in the end (delta: -34.2MB). Peak memory consumption was 62.5MB. Max. memory is 16.1GB. [2021-11-23 17:07:07,326 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 115.3MB. Free memory is still 68.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:07:07,327 INFO L158 Benchmark]: CACSL2BoogieTranslator took 872.08ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 81.8MB in the beginning and 108.4MB in the end (delta: -26.6MB). Peak memory consumption was 31.4MB. Max. memory is 16.1GB. [2021-11-23 17:07:07,327 INFO L158 Benchmark]: Boogie Procedure Inliner took 162.76ms. Allocated memory is still 138.4MB. Free memory was 108.4MB in the beginning and 92.1MB in the end (delta: 16.3MB). Peak memory consumption was 20.1MB. Max. memory is 16.1GB. [2021-11-23 17:07:07,328 INFO L158 Benchmark]: Boogie Preprocessor took 130.41ms. Allocated memory is still 138.4MB. Free memory was 92.1MB in the beginning and 82.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:07:07,329 INFO L158 Benchmark]: RCFGBuilder took 1994.28ms. Allocated memory was 138.4MB in the beginning and 192.9MB in the end (delta: 54.5MB). Free memory was 82.4MB in the beginning and 116.0MB in the end (delta: -33.6MB). Peak memory consumption was 40.3MB. Max. memory is 16.1GB. [2021-11-23 17:07:07,333 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 115.3MB. Free memory is still 68.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 872.08ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 81.8MB in the beginning and 108.4MB in the end (delta: -26.6MB). Peak memory consumption was 31.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 162.76ms. Allocated memory is still 138.4MB. Free memory was 108.4MB in the beginning and 92.1MB in the end (delta: 16.3MB). Peak memory consumption was 20.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 130.41ms. Allocated memory is still 138.4MB. Free memory was 92.1MB in the beginning and 82.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * RCFGBuilder took 1994.28ms. Allocated memory was 138.4MB in the beginning and 192.9MB in the end (delta: 54.5MB). Free memory was 82.4MB in the beginning and 116.0MB in the end (delta: -33.6MB). Peak memory consumption was 40.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:07:07,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash edb6f856db72a43ad08c83ff0e1ee56d288f58300ccdf5a7b1b400a926b63cbe --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:07:09,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:07:09,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:07:09,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:07:09,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:07:09,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:07:09,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:07:09,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:07:09,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:07:09,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:07:09,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:07:09,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:07:09,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:07:09,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:07:09,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:07:09,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:07:09,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:07:09,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:07:09,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:07:09,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:07:09,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:07:09,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:07:09,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:07:09,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:07:09,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:07:09,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:07:09,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:07:09,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:07:09,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:07:09,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:07:09,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:07:09,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:07:09,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:07:09,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:07:09,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:07:09,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:07:09,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:07:09,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:07:09,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:07:09,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:07:09,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:07:09,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:07:09,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:07:09,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:07:09,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:07:09,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:07:09,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:07:09,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:07:09,958 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:07:09,958 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:07:09,958 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:07:09,958 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:07:09,959 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:07:09,959 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:07:09,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:07:09,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:07:09,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:07:09,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:07:09,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:07:09,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:07:09,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:07:09,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:07:09,964 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:07:09,964 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:07:09,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:07:09,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:07:09,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:07:09,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:07:09,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:07:09,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:07:09,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:07:09,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:07:09,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:07:09,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:07:09,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:07:09,968 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:07:09,968 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:07:09,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:07:09,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:07:09,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:07:09,970 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edb6f856db72a43ad08c83ff0e1ee56d288f58300ccdf5a7b1b400a926b63cbe [2021-11-23 17:07:10,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:07:10,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:07:10,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:07:10,399 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:07:10,400 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:07:10,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem11_label54.c [2021-11-23 17:07:10,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data/506807215/dfe6b89a8756459fbea6fec705860bb0/FLAG72a444adf [2021-11-23 17:07:11,198 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:07:11,200 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/sv-benchmarks/c/eca-rers2012/Problem11_label54.c [2021-11-23 17:07:11,216 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data/506807215/dfe6b89a8756459fbea6fec705860bb0/FLAG72a444adf [2021-11-23 17:07:11,363 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/data/506807215/dfe6b89a8756459fbea6fec705860bb0 [2021-11-23 17:07:11,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:07:11,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:07:11,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:07:11,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:07:11,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:07:11,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:07:11" (1/1) ... [2021-11-23 17:07:11,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4973e872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:11, skipping insertion in model container [2021-11-23 17:07:11,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:07:11" (1/1) ... [2021-11-23 17:07:11,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:07:11,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:07:11,882 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/sv-benchmarks/c/eca-rers2012/Problem11_label54.c[5423,5436] [2021-11-23 17:07:12,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:07:12,221 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:07:12,251 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/sv-benchmarks/c/eca-rers2012/Problem11_label54.c[5423,5436] [2021-11-23 17:07:12,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:07:12,476 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:07:12,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12 WrapperNode [2021-11-23 17:07:12,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:07:12,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:07:12,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:07:12,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:07:12,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,616 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 997 [2021-11-23 17:07:12,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:07:12,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:07:12,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:07:12,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:07:12,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:07:12,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:07:12,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:07:12,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:07:12,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:07:12,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:07:12,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:07:12,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:07:12,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:07:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:07:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:07:12,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:07:12,950 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:07:12,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:07:20,959 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:07:20,973 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:07:20,973 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:07:20,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:07:20 BoogieIcfgContainer [2021-11-23 17:07:20,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:07:20,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:07:20,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:07:20,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:07:20,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:07:11" (1/3) ... [2021-11-23 17:07:20,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37779d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:07:20, skipping insertion in model container [2021-11-23 17:07:20,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (2/3) ... [2021-11-23 17:07:20,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37779d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:07:20, skipping insertion in model container [2021-11-23 17:07:20,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:07:20" (3/3) ... [2021-11-23 17:07:20,986 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label54.c [2021-11-23 17:07:20,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:07:20,993 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:07:21,046 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:07:21,053 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=FINITE_AUTOMATA, 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 [2021-11-23 17:07:21,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:07:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 17:07:21,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:21,090 INFO L514 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] [2021-11-23 17:07:21,090 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:07:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times [2021-11-23 17:07:21,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:21,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58356618] [2021-11-23 17:07:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:21,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:21,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:21,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:07:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:07:21,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:07:21,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:07:21,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:21,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58356618] [2021-11-23 17:07:21,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58356618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:07:21,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:07:21,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:07:21,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796310570] [2021-11-23 17:07:21,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:21,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:07:21,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:21,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:07:21,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:21,625 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 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 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:29,989 INFO L93 Difference]: Finished difference Result 775 states and 1362 transitions. [2021-11-23 17:07:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:07:29,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-23 17:07:30,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:30,019 INFO L225 Difference]: With dead ends: 775 [2021-11-23 17:07:30,019 INFO L226 Difference]: Without dead ends: 412 [2021-11-23 17:07:30,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:30,030 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 188 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:30,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 196 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2021-11-23 17:07:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-23 17:07:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 409. [2021-11-23 17:07:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.4583333333333333) internal successors, (595), 408 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 595 transitions. [2021-11-23 17:07:30,117 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 595 transitions. Word has length 37 [2021-11-23 17:07:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:30,118 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 595 transitions. [2021-11-23 17:07:30,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:30,119 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 595 transitions. [2021-11-23 17:07:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 17:07:30,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:30,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:07:30,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:07:30,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:30,327 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:07:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:30,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1017074320, now seen corresponding path program 1 times [2021-11-23 17:07:30,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:30,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966279513] [2021-11-23 17:07:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:30,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:30,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:30,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:07:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:30,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:07:30,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:07:30,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:07:30,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:30,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966279513] [2021-11-23 17:07:30,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966279513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:07:30,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:07:30,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:07:30,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732037036] [2021-11-23 17:07:30,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:30,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:07:30,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:30,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:07:30,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:30,946 INFO L87 Difference]: Start difference. First operand 409 states and 595 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:41,198 INFO L93 Difference]: Finished difference Result 1199 states and 1751 transitions. [2021-11-23 17:07:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:07:41,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-11-23 17:07:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:41,210 INFO L225 Difference]: With dead ends: 1199 [2021-11-23 17:07:41,211 INFO L226 Difference]: Without dead ends: 792 [2021-11-23 17:07:41,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:41,215 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 132 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:41,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 183 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-23 17:07:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-11-23 17:07:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 781. [2021-11-23 17:07:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 1.3474358974358975) internal successors, (1051), 780 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1051 transitions. [2021-11-23 17:07:41,260 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1051 transitions. Word has length 105 [2021-11-23 17:07:41,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:41,261 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1051 transitions. [2021-11-23 17:07:41,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1051 transitions. [2021-11-23 17:07:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 17:07:41,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:41,266 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:07:41,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:41,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:41,481 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:07:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash 297441333, now seen corresponding path program 1 times [2021-11-23 17:07:41,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:41,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845218932] [2021-11-23 17:07:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:41,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:41,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:41,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:41,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:07:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:07:41,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:07:42,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:07:42,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:42,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845218932] [2021-11-23 17:07:42,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845218932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:07:42,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:07:42,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:07:42,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781136568] [2021-11-23 17:07:42,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:42,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:07:42,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:42,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:07:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:42,018 INFO L87 Difference]: Start difference. First operand 781 states and 1051 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:50,200 INFO L93 Difference]: Finished difference Result 1929 states and 2651 transitions. [2021-11-23 17:07:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:07:50,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-11-23 17:07:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:50,221 INFO L225 Difference]: With dead ends: 1929 [2021-11-23 17:07:50,221 INFO L226 Difference]: Without dead ends: 1150 [2021-11-23 17:07:50,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:50,231 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 148 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:50,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 154 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 17:07:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-11-23 17:07:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2021-11-23 17:07:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.2567449956483898) internal successors, (1444), 1149 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1444 transitions. [2021-11-23 17:07:50,309 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1444 transitions. Word has length 108 [2021-11-23 17:07:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:50,310 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1444 transitions. [2021-11-23 17:07:50,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1444 transitions. [2021-11-23 17:07:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 17:07:50,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:50,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:07:50,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:50,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:50,543 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:07:50,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:50,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1041606763, now seen corresponding path program 1 times [2021-11-23 17:07:50,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:50,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734197071] [2021-11-23 17:07:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:50,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:50,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:50,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:50,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:07:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:07:50,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:07:51,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:07:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:07:52,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:52,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734197071] [2021-11-23 17:07:52,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734197071] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:07:52,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:07:52,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:07:52,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119880439] [2021-11-23 17:07:52,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:52,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:07:52,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:07:52,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:07:52,176 INFO L87 Difference]: Start difference. First operand 1150 states and 1444 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:29,539 INFO L93 Difference]: Finished difference Result 2674 states and 3494 transitions. [2021-11-23 17:08:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:29,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2021-11-23 17:08:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:29,560 INFO L225 Difference]: With dead ends: 2674 [2021-11-23 17:08:29,561 INFO L226 Difference]: Without dead ends: 1894 [2021-11-23 17:08:29,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:08:29,564 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 199 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:29,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 65 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 37.3s Time] [2021-11-23 17:08:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-11-23 17:08:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1891. [2021-11-23 17:08:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 1.2671957671957672) internal successors, (2395), 1890 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 2395 transitions. [2021-11-23 17:08:29,619 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 2395 transitions. Word has length 164 [2021-11-23 17:08:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:29,620 INFO L470 AbstractCegarLoop]: Abstraction has 1891 states and 2395 transitions. [2021-11-23 17:08:29,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 2395 transitions. [2021-11-23 17:08:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-23 17:08:29,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:29,625 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:29,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:29,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:29,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash 629777389, now seen corresponding path program 1 times [2021-11-23 17:08:29,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:29,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457192064] [2021-11-23 17:08:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:29,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:29,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:29,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:29,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:08:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:30,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:08:30,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 69 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:32,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:08:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:35,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:35,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457192064] [2021-11-23 17:08:35,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457192064] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:08:35,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:08:35,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:08:35,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460053053] [2021-11-23 17:08:35,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:35,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:08:35,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:08:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:08:35,916 INFO L87 Difference]: Start difference. First operand 1891 states and 2395 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:53,190 INFO L93 Difference]: Finished difference Result 3408 states and 4571 transitions. [2021-11-23 17:08:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:53,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 218 [2021-11-23 17:08:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:53,213 INFO L225 Difference]: With dead ends: 3408 [2021-11-23 17:08:53,213 INFO L226 Difference]: Without dead ends: 2629 [2021-11-23 17:08:53,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:08:53,216 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:53,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 49 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2021-11-23 17:08:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-11-23 17:08:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 2629. [2021-11-23 17:08:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 1.295281582952816) internal successors, (3404), 2628 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 3404 transitions. [2021-11-23 17:08:53,290 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 3404 transitions. Word has length 218 [2021-11-23 17:08:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:53,291 INFO L470 AbstractCegarLoop]: Abstraction has 2629 states and 3404 transitions. [2021-11-23 17:08:53,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 3404 transitions. [2021-11-23 17:08:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-23 17:08:53,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:53,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:53,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:53,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:53,510 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1345713297, now seen corresponding path program 1 times [2021-11-23 17:08:53,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:53,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809501545] [2021-11-23 17:08:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:53,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:53,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:53,515 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:53,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:08:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:08:53,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 48 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:57,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 127 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:37,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:37,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809501545] [2021-11-23 17:09:37,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809501545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:09:37,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1831043998] [2021-11-23 17:09:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:37,965 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:09:37,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:09:37,970 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:09:37,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:09:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:09:38,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 17:09:38,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:09:38,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1831043998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:09:38,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:09:38,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2021-11-23 17:09:38,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51710259] [2021-11-23 17:09:38,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:09:38,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:09:38,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:09:38,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:09:38,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:09:38,592 INFO L87 Difference]: Start difference. First operand 2629 states and 3404 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:09:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:09:48,040 INFO L93 Difference]: Finished difference Result 5631 states and 7446 transitions. [2021-11-23 17:09:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:09:48,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 229 [2021-11-23 17:09:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:09:48,061 INFO L225 Difference]: With dead ends: 5631 [2021-11-23 17:09:48,061 INFO L226 Difference]: Without dead ends: 3372 [2021-11-23 17:09:48,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 677 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:09:48,066 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 160 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:09:48,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 385 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2021-11-23 17:09:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-11-23 17:09:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3366. [2021-11-23 17:09:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 1.2716196136701337) internal successors, (4279), 3365 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:09:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4279 transitions. [2021-11-23 17:09:48,177 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4279 transitions. Word has length 229 [2021-11-23 17:09:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:09:48,178 INFO L470 AbstractCegarLoop]: Abstraction has 3366 states and 4279 transitions. [2021-11-23 17:09:48,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:09:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4279 transitions. [2021-11-23 17:09:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-23 17:09:48,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:09:48,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:09:48,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:09:48,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:09:48,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:09:48,602 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:09:48,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:09:48,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1645985453, now seen corresponding path program 1 times [2021-11-23 17:09:48,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:09:48,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272521870] [2021-11-23 17:09:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:48,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:09:48,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:09:48,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:09:48,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:09:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:48,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:09:48,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 69 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:52,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 148 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:09:58,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:58,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272521870] [2021-11-23 17:09:58,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272521870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:09:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [490121281] [2021-11-23 17:09:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:58,821 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:09:58,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:09:58,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:09:58,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:09:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:09:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 17:09:59,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:09:59,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [490121281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:09:59,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:09:59,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2021-11-23 17:09:59,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57604732] [2021-11-23 17:09:59,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:09:59,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:09:59,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:09:59,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:09:59,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:09:59,893 INFO L87 Difference]: Start difference. First operand 3366 states and 4279 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:25,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:10:33,106 INFO L93 Difference]: Finished difference Result 8223 states and 10796 transitions. [2021-11-23 17:10:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:10:33,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 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 246 [2021-11-23 17:10:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:10:33,136 INFO L225 Difference]: With dead ends: 8223 [2021-11-23 17:10:33,136 INFO L226 Difference]: Without dead ends: 5043 [2021-11-23 17:10:33,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:10:33,142 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 398 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:10:33,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 58 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 33.1s Time] [2021-11-23 17:10:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2021-11-23 17:10:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 4470. [2021-11-23 17:10:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4470 states, 4469 states have (on average 1.2848511971358245) internal successors, (5742), 4469 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4470 states to 4470 states and 5742 transitions. [2021-11-23 17:10:33,280 INFO L78 Accepts]: Start accepts. Automaton has 4470 states and 5742 transitions. Word has length 246 [2021-11-23 17:10:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:10:33,281 INFO L470 AbstractCegarLoop]: Abstraction has 4470 states and 5742 transitions. [2021-11-23 17:10:33,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4470 states and 5742 transitions. [2021-11-23 17:10:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-23 17:10:33,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:33,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:10:33,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:33,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:33,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:33,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1789936803, now seen corresponding path program 1 times [2021-11-23 17:10:33,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:33,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030949173] [2021-11-23 17:10:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:33,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:33,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:33,710 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:33,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:10:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:33,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:10:33,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:36,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 139 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:10:38,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:10:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030949173] [2021-11-23 17:10:38,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030949173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1919691583] [2021-11-23 17:10:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:38,393 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:10:38,394 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:10:38,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:10:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:38,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:10:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 17:10:40,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 17:10:41,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1919691583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:41,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791853370] [2021-11-23 17:10:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:41,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:10:41,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:10:41,460 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:10:41,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 17:10:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:10:41,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 17:10:42,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 17:10:44,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791853370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:44,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:10:44,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 3, 3] total 14 [2021-11-23 17:10:44,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762789771] [2021-11-23 17:10:44,781 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:10:44,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 17:10:44,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:10:44,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 17:10:44,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:10:44,785 INFO L87 Difference]: Start difference. First operand 4470 states and 5742 transitions. Second operand has 15 states, 15 states have (on average 67.93333333333334) internal successors, (1019), 14 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:05,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:22,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:24,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:28,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:45,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:35,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:14:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:10,095 INFO L93 Difference]: Finished difference Result 22290 states and 29813 transitions. [2021-11-23 17:14:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 17:14:10,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 67.93333333333334) internal successors, (1019), 14 states have internal predecessors, (1019), 0 states have call successors, (0), 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 320 [2021-11-23 17:14:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:10,197 INFO L225 Difference]: With dead ends: 22290 [2021-11-23 17:14:10,197 INFO L226 Difference]: Without dead ends: 15375 [2021-11-23 17:14:10,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1943 GetRequests, 1901 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=494, Invalid=1398, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 17:14:10,215 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 4949 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 14955 mSolverCounterSat, 3102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4949 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 18057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3102 IncrementalHoareTripleChecker+Valid, 14955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 203.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:10,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4949 Valid, 428 Invalid, 18057 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3102 Valid, 14955 Invalid, 0 Unknown, 0 Unchecked, 203.2s Time] [2021-11-23 17:14:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15375 states. [2021-11-23 17:14:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15375 to 11290. [2021-11-23 17:14:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11290 states, 11289 states have (on average 1.2389051288865267) internal successors, (13986), 11289 states have internal predecessors, (13986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 13986 transitions. [2021-11-23 17:14:10,617 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 13986 transitions. Word has length 320 [2021-11-23 17:14:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:10,618 INFO L470 AbstractCegarLoop]: Abstraction has 11290 states and 13986 transitions. [2021-11-23 17:14:10,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 67.93333333333334) internal successors, (1019), 14 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 13986 transitions. [2021-11-23 17:14:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-11-23 17:14:10,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:10,648 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:10,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:10,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:11,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:11,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:11,274 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:11,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:11,276 INFO L85 PathProgramCache]: Analyzing trace with hash -993773348, now seen corresponding path program 1 times [2021-11-23 17:14:11,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:11,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949335044] [2021-11-23 17:14:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:11,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:11,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:11,280 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:11,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:14:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:11,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:14:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 277 proven. 96 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 17:14:13,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 356 proven. 17 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 17:14:17,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:17,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949335044] [2021-11-23 17:14:17,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949335044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:14:17,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1470051481] [2021-11-23 17:14:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:17,188 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:14:17,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:14:17,191 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:14:17,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:14:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:17,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:14:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 280 proven. 32 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 17:14:20,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 280 proven. 32 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 17:14:24,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1470051481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:14:24,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87277105] [2021-11-23 17:14:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:24,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:14:24,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:14:24,040 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:14:24,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:14:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:24,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:14:24,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 17:14:25,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:25,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87277105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:25,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:14:25,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 5, 5] total 10 [2021-11-23 17:14:25,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887409183] [2021-11-23 17:14:25,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:25,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:25,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:14:25,709 INFO L87 Difference]: Start difference. First operand 11290 states and 13986 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:32,950 INFO L93 Difference]: Finished difference Result 24968 states and 31163 transitions. [2021-11-23 17:14:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:32,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 406 [2021-11-23 17:14:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:32,979 INFO L225 Difference]: With dead ends: 24968 [2021-11-23 17:14:32,979 INFO L226 Difference]: Without dead ends: 12758 [2021-11-23 17:14:33,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2025 GetRequests, 2017 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:14:33,034 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:33,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 131 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-11-23 17:14:33,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12758 states. [2021-11-23 17:14:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12758 to 12203. [2021-11-23 17:14:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12203 states, 12202 states have (on average 1.1716112112768398) internal successors, (14296), 12202 states have internal predecessors, (14296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12203 states to 12203 states and 14296 transitions. [2021-11-23 17:14:33,433 INFO L78 Accepts]: Start accepts. Automaton has 12203 states and 14296 transitions. Word has length 406 [2021-11-23 17:14:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:33,434 INFO L470 AbstractCegarLoop]: Abstraction has 12203 states and 14296 transitions. [2021-11-23 17:14:33,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 12203 states and 14296 transitions. [2021-11-23 17:14:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-11-23 17:14:33,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:33,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 17:14:33,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:33,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:33,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:34,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:14:34,102 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:34,103 INFO L85 PathProgramCache]: Analyzing trace with hash 468565791, now seen corresponding path program 1 times [2021-11-23 17:14:34,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:34,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697705783] [2021-11-23 17:14:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:34,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:34,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:34,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:34,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:14:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:34,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:14:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 17:14:35,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:35,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:35,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697705783] [2021-11-23 17:14:35,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697705783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:35,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:35,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:14:35,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173574796] [2021-11-23 17:14:35,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:35,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:35,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:35,193 INFO L87 Difference]: Start difference. First operand 12203 states and 14296 transitions. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:43,854 INFO L93 Difference]: Finished difference Result 25335 states and 29794 transitions. [2021-11-23 17:14:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:43,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 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 448 [2021-11-23 17:14:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:43,901 INFO L225 Difference]: With dead ends: 25335 [2021-11-23 17:14:43,927 INFO L226 Difference]: Without dead ends: 13502 [2021-11-23 17:14:43,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:43,953 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:43,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 327 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-11-23 17:14:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13502 states. [2021-11-23 17:14:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13502 to 12755. [2021-11-23 17:14:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12755 states, 12754 states have (on average 1.1461502273796456) internal successors, (14618), 12754 states have internal predecessors, (14618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12755 states to 12755 states and 14618 transitions. [2021-11-23 17:14:44,275 INFO L78 Accepts]: Start accepts. Automaton has 12755 states and 14618 transitions. Word has length 448 [2021-11-23 17:14:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:44,276 INFO L470 AbstractCegarLoop]: Abstraction has 12755 states and 14618 transitions. [2021-11-23 17:14:44,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 12755 states and 14618 transitions. [2021-11-23 17:14:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-11-23 17:14:44,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:44,290 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 17:14:44,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:44,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:44,516 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:44,517 INFO L85 PathProgramCache]: Analyzing trace with hash 451140152, now seen corresponding path program 1 times [2021-11-23 17:14:44,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:44,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807882093] [2021-11-23 17:14:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:44,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:44,523 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:44,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:14:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:44,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:14:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-23 17:14:45,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:45,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:45,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807882093] [2021-11-23 17:14:45,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807882093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:45,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:45,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:14:45,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091151000] [2021-11-23 17:14:45,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:45,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:45,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:45,843 INFO L87 Difference]: Start difference. First operand 12755 states and 14618 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:54,455 INFO L93 Difference]: Finished difference Result 24600 states and 28233 transitions. [2021-11-23 17:14:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:54,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 458 [2021-11-23 17:14:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:54,480 INFO L225 Difference]: With dead ends: 24600 [2021-11-23 17:14:54,481 INFO L226 Difference]: Without dead ends: 12215 [2021-11-23 17:14:54,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:54,494 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 39 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:54,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 344 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-11-23 17:14:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12215 states. [2021-11-23 17:14:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12215 to 12017. [2021-11-23 17:14:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12017 states, 12016 states have (on average 1.1195073235685753) internal successors, (13452), 12016 states have internal predecessors, (13452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12017 states to 12017 states and 13452 transitions. [2021-11-23 17:14:54,780 INFO L78 Accepts]: Start accepts. Automaton has 12017 states and 13452 transitions. Word has length 458 [2021-11-23 17:14:54,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:54,781 INFO L470 AbstractCegarLoop]: Abstraction has 12017 states and 13452 transitions. [2021-11-23 17:14:54,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:14:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 12017 states and 13452 transitions. [2021-11-23 17:14:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2021-11-23 17:14:54,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:54,802 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:14:54,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:55,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:55,022 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:55,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1953895983, now seen corresponding path program 1 times [2021-11-23 17:14:55,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:55,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815244620] [2021-11-23 17:14:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:55,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:55,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:55,075 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:55,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:14:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:55,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:14:55,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 631 proven. 97 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-23 17:14:56,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 728 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-23 17:14:58,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:58,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815244620] [2021-11-23 17:14:58,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815244620] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:14:58,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:14:58,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:14:58,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300179768] [2021-11-23 17:14:58,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:58,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:14:58,313 INFO L87 Difference]: Start difference. First operand 12017 states and 13452 transitions. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:13,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:15:20,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:15:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:20,228 INFO L93 Difference]: Finished difference Result 26791 states and 29969 transitions. [2021-11-23 17:15:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:20,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 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 573 [2021-11-23 17:15:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:20,253 INFO L225 Difference]: With dead ends: 26791 [2021-11-23 17:15:20,253 INFO L226 Difference]: Without dead ends: 15144 [2021-11-23 17:15:20,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:15:20,266 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 103 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 123 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:20,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 325 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 485 Invalid, 1 Unknown, 0 Unchecked, 21.8s Time] [2021-11-23 17:15:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15144 states. [2021-11-23 17:15:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15144 to 13487. [2021-11-23 17:15:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13487 states, 13486 states have (on average 1.1007711701023284) internal successors, (14845), 13486 states have internal predecessors, (14845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13487 states to 13487 states and 14845 transitions. [2021-11-23 17:15:20,543 INFO L78 Accepts]: Start accepts. Automaton has 13487 states and 14845 transitions. Word has length 573 [2021-11-23 17:15:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:20,544 INFO L470 AbstractCegarLoop]: Abstraction has 13487 states and 14845 transitions. [2021-11-23 17:15:20,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:20,545 INFO L276 IsEmpty]: Start isEmpty. Operand 13487 states and 14845 transitions. [2021-11-23 17:15:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-11-23 17:15:20,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:20,566 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:20,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:20,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:20,782 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash -630965213, now seen corresponding path program 1 times [2021-11-23 17:15:20,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:20,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608364136] [2021-11-23 17:15:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:20,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:20,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:20,787 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:20,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:15:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:15:21,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 548 proven. 451 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 17:15:22,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:15:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 828 proven. 171 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 17:15:32,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:32,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608364136] [2021-11-23 17:15:32,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608364136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:15:32,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [543716619] [2021-11-23 17:15:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:32,431 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:15:32,432 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:15:32,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:15:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:33,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:15:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 0 proven. 923 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-23 17:15:35,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:15:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 0 proven. 923 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-23 17:15:57,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [543716619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:15:57,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231346837] [2021-11-23 17:15:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:57,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:15:57,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:57,056 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:15:57,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 17:15:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:15:57,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 682 proven. 282 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 17:15:58,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1119 backedges. 853 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-23 17:16:00,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231346837] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:16:00,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:16:00,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 6, 7, 4] total 19 [2021-11-23 17:16:00,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980807736] [2021-11-23 17:16:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:00,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:00,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:00,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:00,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:16:00,355 INFO L87 Difference]: Start difference. First operand 13487 states and 14845 transitions. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:11,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:16:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:16,364 INFO L93 Difference]: Finished difference Result 27517 states and 30284 transitions. [2021-11-23 17:16:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:16,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 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 587 [2021-11-23 17:16:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:16,392 INFO L225 Difference]: With dead ends: 27517 [2021-11-23 17:16:16,393 INFO L226 Difference]: Without dead ends: 15694 [2021-11-23 17:16:16,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3516 GetRequests, 3499 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:16:16,401 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 134 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:16,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 82 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2021-11-23 17:16:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15694 states. [2021-11-23 17:16:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15694 to 13852. [2021-11-23 17:16:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13852 states, 13851 states have (on average 1.0930618727889683) internal successors, (15140), 13851 states have internal predecessors, (15140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13852 states to 13852 states and 15140 transitions. [2021-11-23 17:16:16,671 INFO L78 Accepts]: Start accepts. Automaton has 13852 states and 15140 transitions. Word has length 587 [2021-11-23 17:16:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:16,672 INFO L470 AbstractCegarLoop]: Abstraction has 13852 states and 15140 transitions. [2021-11-23 17:16:16,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 13852 states and 15140 transitions. [2021-11-23 17:16:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2021-11-23 17:16:16,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:16,694 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 17:16:16,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:16,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:17,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:17,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:17,313 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -830228521, now seen corresponding path program 1 times [2021-11-23 17:16:17,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:17,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252317058] [2021-11-23 17:16:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:17,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:17,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:17,319 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:17,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:16:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:17,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:16:17,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 864 proven. 722 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-23 17:16:21,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 984 proven. 602 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-23 17:16:58,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252317058] [2021-11-23 17:16:58,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252317058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830641677] [2021-11-23 17:16:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:58,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:58,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:58,266 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:58,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 17:16:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 720 proven. 0 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2021-11-23 17:16:59,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:59,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [830641677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:59,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:16:59,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 6] total 11 [2021-11-23 17:16:59,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504479901] [2021-11-23 17:16:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:59,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:59,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:59,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:59,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:16:59,914 INFO L87 Difference]: Start difference. First operand 13852 states and 15140 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:06,990 INFO L93 Difference]: Finished difference Result 25855 states and 28301 transitions. [2021-11-23 17:17:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:06,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 728 [2021-11-23 17:17:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:07,011 INFO L225 Difference]: With dead ends: 25855 [2021-11-23 17:17:07,011 INFO L226 Difference]: Without dead ends: 13851 [2021-11-23 17:17:07,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2181 GetRequests, 2172 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:17:07,017 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 84 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:07,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 284 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2021-11-23 17:17:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13851 states. [2021-11-23 17:17:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13851 to 12929. [2021-11-23 17:17:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12929 states, 12928 states have (on average 1.0829981435643565) internal successors, (14001), 12928 states have internal predecessors, (14001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12929 states to 12929 states and 14001 transitions. [2021-11-23 17:17:07,312 INFO L78 Accepts]: Start accepts. Automaton has 12929 states and 14001 transitions. Word has length 728 [2021-11-23 17:17:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:07,313 INFO L470 AbstractCegarLoop]: Abstraction has 12929 states and 14001 transitions. [2021-11-23 17:17:07,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 12929 states and 14001 transitions. [2021-11-23 17:17:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2021-11-23 17:17:07,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:07,337 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 17:17:07,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:07,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-23 17:17:07,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:07,739 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:07,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1306890472, now seen corresponding path program 1 times [2021-11-23 17:17:07,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:07,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724927493] [2021-11-23 17:17:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:07,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:07,746 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:07,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:17:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:08,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:08,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 992 proven. 264 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2021-11-23 17:17:09,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 1179 proven. 77 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2021-11-23 17:17:36,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:36,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724927493] [2021-11-23 17:17:36,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724927493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:36,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659082679] [2021-11-23 17:17:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:36,812 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:36,813 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:36,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:17:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:37,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:17:37,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-11-23 17:17:40,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:18:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-11-23 17:18:00,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1659082679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:18:00,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202164087] [2021-11-23 17:18:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:00,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:18:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:18:00,941 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:18:00,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e10150d7-d4d9-41d5-9916-3afed5aae882/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:18:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:18:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-11-23 17:18:03,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:18:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-11-23 17:18:35,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202164087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:18:35,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:18:35,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 7, 5, 5] total 20 [2021-11-23 17:18:35,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814274669] [2021-11-23 17:18:35,648 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:18:35,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 17:18:35,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 17:18:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:18:35,653 INFO L87 Difference]: Start difference. First operand 12929 states and 14001 transitions. Second operand has 20 states, 20 states have (on average 92.05) internal successors, (1841), 20 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)